[PATCH for v3.18 00/18] Backport CVE-2017-13166 fixes to Kernel 3.18

[PATCH for v3.18 00/18] Backport CVE-2017-13166 fixes to Kernel 3.18

[Mauro Carvalho Chehab]

Hi Greg,

Those are the backports meant to solve CVE-2017-13166 on Kernel 3.18.

It contains two v4l2-ctrls fixes that are required to avoid crashes
at the test application.

I wrote two patches myself for Kernel 3.18 in order to solve some
issues specific for Kernel 3.18 with aren't needed upstream.
one is actually a one-line change backport. The other one makes
sure that both 32-bits and 64-bits version of some ioctl calls
will return the same value for a reserved field.

I noticed an extra bug while testing it, but the bug also hits upstream,
and should be backported all the way down all stable/LTS versions.
So, I'll send it the usual way, after merging upsream.

Regards,
Mauro


Daniel Mentz (2):
  media: v4l2-compat-ioctl32: Copy v4l2_window->global_alpha
  media: v4l2-compat-ioctl32.c: refactor compat ioctl32 logic

Hans Verkuil (12):
  media: v4l2-ioctl.c: don't copy back the result for -ENOTTY
  media: v4l2-compat-ioctl32.c: add missing VIDIOC_PREPARE_BUF
  media: v4l2-compat-ioctl32.c: fix the indentation
  media: v4l2-compat-ioctl32.c: move 'helper' functions to
    __get/put_v4l2_format32
  media: v4l2-compat-ioctl32.c: avoid sizeof(type)
  media: v4l2-compat-ioctl32.c: copy m.userptr in put_v4l2_plane32
  media: v4l2-compat-ioctl32.c: fix ctrl_is_pointer
  media: v4l2-compat-ioctl32.c: make ctrl_is_pointer work for subdevs
  media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32
  media: v4l2-compat-ioctl32.c: drop pr_info for unknown buffer type
  media: v4l2-compat-ioctl32.c: don't copy back the result for certain
    errors
  media: v4l2-ctrls: fix sparse warning

Mauro Carvalho Chehab (2):
  media: v4l2-compat-ioctl32: use compat_u64 for video standard
  media: v4l2-compat-ioctl32: initialize a reserved field

Ricardo Ribalda (2):
  vb2: V4L2_BUF_FLAG_DONE is set after DQBUF
  media: media/v4l2-ctrls: volatiles should not generate CH_VALUE

 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 1020 +++++++++++++++----------
 drivers/media/v4l2-core/v4l2-ctrls.c          |   96 ++-
 drivers/media/v4l2-core/v4l2-ioctl.c          |    5 +-
 drivers/media/v4l2-core/videobuf2-core.c      |    5 +
 4 files changed, 691 insertions(+), 435 deletions(-)

-- 
2.14.3

[PATCH for v3.18 01/18] media: v4l2-ioctl.c: don't copy back the result for -ENOTTY

[Mauro Carvalho Chehab]

From: Hans Verkuil <hans.verkuil@cisco.com>

commit 181a4a2d5a0a7b43cab08a70710d727e7764ccdd upstream.

If the ioctl returned -ENOTTY, then don't bother copying
back the result as there is no point.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
 drivers/media/v4l2-core/v4l2-ioctl.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 9ccb19a435ef..bb2387fcbfee 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -2539,8 +2539,11 @@ video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
 
 	/* Handles IOCTL */
 	err = func(file, cmd, parg);
-	if (err == -ENOIOCTLCMD)
+	if (err == -ENOTTY || err == -ENOIOCTLCMD) {
 		err = -ENOTTY;
+		goto out;
+	}
+
 	if (err == 0) {
 		if (cmd == VIDIOC_DQBUF)
 			trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
-- 
2.14.3

[PATCH for v3.18 02/18] vb2: V4L2_BUF_FLAG_DONE is set after DQBUF

[Mauro Carvalho Chehab]

From: Ricardo Ribalda <ricardo.ribalda@gmail.com>

commit 3171cc2b4eb9831ab4df1d80d0410a945b8bc84e upstream.

According to the doc, V4L2_BUF_FLAG_DONE is cleared after DQBUF:

V4L2_BUF_FLAG_DONE 0x00000004  ... After calling the VIDIOC_QBUF or
VIDIOC_DQBUF it is always cleared ...

Unfortunately, it seems that videobuf2 keeps it set after DQBUF. This
can be tested with vivid and dev_debug:

[257604.338082] video1: VIDIOC_DQBUF: 71:33:25.00260479 index=3,
type=vid-cap, flags=0x00002004, field=none, sequence=163,
memory=userptr, bytesused=460800, offset/userptr=0x344b000,
length=460800

This patch forces FLAG_DONE to 0 after calling DQBUF.

Reported-by: Dimitrios Katsaros <patcherwork@gmail.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
 drivers/media/v4l2-core/videobuf2-core.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index d5c300150cf4..f0811b7e900d 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -2075,6 +2075,11 @@ static int vb2_internal_dqbuf(struct vb2_queue *q, struct v4l2_buffer *b, bool n
 	dprintk(1, "dqbuf of buffer %d, with state %d\n",
 			vb->v4l2_buf.index, vb->state);
 
+	/*
+	 * After calling the VIDIOC_DQBUF V4L2_BUF_FLAG_DONE must be
+	 * cleared.
+	 */
+	b->flags &= ~V4L2_BUF_FLAG_DONE;
 	return 0;
 }
 
-- 
2.14.3

[PATCH for v3.18 03/18] media: v4l2-compat-ioctl32.c: add missing VIDIOC_PREPARE_BUF

[Mauro Carvalho Chehab]

From: Hans Verkuil <hans.verkuil@cisco.com>

commit 3ee6d040719ae09110e5cdf24d5386abe5d1b776 upstream.

The result of the VIDIOC_PREPARE_BUF ioctl was never copied back
to userspace since it was missing in the switch.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index aa11f02c0a8f..fc4f92a0c985 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -996,6 +996,7 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 		err = put_v4l2_create32(&karg.v2crt, up);
 		break;
 
+	case VIDIOC_PREPARE_BUF:
 	case VIDIOC_QUERYBUF:
 	case VIDIOC_QBUF:
 	case VIDIOC_DQBUF:
-- 
2.14.3

[PATCH for v3.18 04/18] media: v4l2-compat-ioctl32.c: fix the indentation

[Mauro Carvalho Chehab]

From: Hans Verkuil <hans.verkuil@cisco.com>

commit b7b957d429f601d6d1942122b339474f31191d75 upstream.

The indentation of this source is all over the place. Fix this.
This patch only changes whitespace.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 216 +++++++++++++-------------
 1 file changed, 108 insertions(+), 108 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index fc4f92a0c985..866019bbf513 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -48,11 +48,11 @@ struct v4l2_window32 {
 static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
 {
 	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_window32)) ||
-		copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
-		get_user(kp->field, &up->field) ||
-		get_user(kp->chromakey, &up->chromakey) ||
-		get_user(kp->clipcount, &up->clipcount))
-			return -EFAULT;
+	    copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
+	    get_user(kp->field, &up->field) ||
+	    get_user(kp->chromakey, &up->chromakey) ||
+	    get_user(kp->clipcount, &up->clipcount))
+		return -EFAULT;
 	if (kp->clipcount > 2048)
 		return -EINVAL;
 	if (kp->clipcount) {
@@ -82,10 +82,10 @@ static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user
 static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
 {
 	if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
-		put_user(kp->field, &up->field) ||
-		put_user(kp->chromakey, &up->chromakey) ||
-		put_user(kp->clipcount, &up->clipcount))
-			return -EFAULT;
+	    put_user(kp->field, &up->field) ||
+	    put_user(kp->chromakey, &up->chromakey) ||
+	    put_user(kp->clipcount, &up->clipcount))
+		return -EFAULT;
 	return 0;
 }
 
@@ -97,7 +97,7 @@ static inline int get_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pi
 }
 
 static inline int get_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
-				struct v4l2_pix_format_mplane __user *up)
+					     struct v4l2_pix_format_mplane __user *up)
 {
 	if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format_mplane)))
 		return -EFAULT;
@@ -112,7 +112,7 @@ static inline int put_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pi
 }
 
 static inline int put_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
-				struct v4l2_pix_format_mplane __user *up)
+					     struct v4l2_pix_format_mplane __user *up)
 {
 	if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format_mplane)))
 		return -EFAULT;
@@ -200,7 +200,7 @@ static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __us
 		return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
 	default:
 		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
-								kp->type);
+		       kp->type);
 		return -EINVAL;
 	}
 }
@@ -241,7 +241,7 @@ static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __us
 		return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
 	default:
 		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
-								kp->type);
+		       kp->type);
 		return -EINVAL;
 	}
 }
@@ -275,7 +275,7 @@ static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32
 {
 	/* other fields are not set by the user, nor used by the driver */
 	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
-		get_user(kp->index, &up->index))
+	    get_user(kp->index, &up->index))
 		return -EFAULT;
 	return 0;
 }
@@ -283,13 +283,13 @@ static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32
 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
-		put_user(kp->index, &up->index) ||
-		copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
-		copy_to_user(up->name, kp->name, 24) ||
-		copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
-		put_user(kp->framelines, &up->framelines) ||
-		copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
-			return -EFAULT;
+	    put_user(kp->index, &up->index) ||
+	    copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
+	    copy_to_user(up->name, kp->name, 24) ||
+	    copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
+	    put_user(kp->framelines, &up->framelines) ||
+	    copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -329,14 +329,14 @@ struct v4l2_buffer32 {
 };
 
 static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
-				enum v4l2_memory memory)
+			    enum v4l2_memory memory)
 {
 	void __user *up_pln;
 	compat_long_t p;
 
 	if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
-		copy_in_user(&up->data_offset, &up32->data_offset,
-				sizeof(__u32)))
+	    copy_in_user(&up->data_offset, &up32->data_offset,
+			 sizeof(__u32)))
 		return -EFAULT;
 
 	if (memory == V4L2_MEMORY_USERPTR) {
@@ -350,7 +350,7 @@ static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __
 			return -EFAULT;
 	} else {
 		if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
-					sizeof(__u32)))
+				 sizeof(__u32)))
 			return -EFAULT;
 	}
 
@@ -358,23 +358,23 @@ static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __
 }
 
 static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
-				enum v4l2_memory memory)
+			    enum v4l2_memory memory)
 {
 	if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
-		copy_in_user(&up32->data_offset, &up->data_offset,
-				sizeof(__u32)))
+	    copy_in_user(&up32->data_offset, &up->data_offset,
+			 sizeof(__u32)))
 		return -EFAULT;
 
 	/* For MMAP, driver might've set up the offset, so copy it back.
 	 * USERPTR stays the same (was userspace-provided), so no copying. */
 	if (memory == V4L2_MEMORY_MMAP)
 		if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
-					sizeof(__u32)))
+				 sizeof(__u32)))
 			return -EFAULT;
 	/* For DMABUF, driver might've set up the fd, so copy it back. */
 	if (memory == V4L2_MEMORY_DMABUF)
 		if (copy_in_user(&up32->m.fd, &up->m.fd,
-					sizeof(int)))
+				 sizeof(int)))
 			return -EFAULT;
 
 	return 0;
@@ -389,19 +389,19 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 	int ret;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
-		get_user(kp->index, &up->index) ||
-		get_user(kp->type, &up->type) ||
-		get_user(kp->flags, &up->flags) ||
-		get_user(kp->memory, &up->memory) ||
-		get_user(kp->length, &up->length))
-			return -EFAULT;
+	    get_user(kp->index, &up->index) ||
+	    get_user(kp->type, &up->type) ||
+	    get_user(kp->flags, &up->flags) ||
+	    get_user(kp->memory, &up->memory) ||
+	    get_user(kp->length, &up->length))
+		return -EFAULT;
 
 	if (V4L2_TYPE_IS_OUTPUT(kp->type))
 		if (get_user(kp->bytesused, &up->bytesused) ||
-			get_user(kp->field, &up->field) ||
-			get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-			get_user(kp->timestamp.tv_usec,
-					&up->timestamp.tv_usec))
+		    get_user(kp->field, &up->field) ||
+		    get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
+		    get_user(kp->timestamp.tv_usec,
+			     &up->timestamp.tv_usec))
 			return -EFAULT;
 
 	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
@@ -418,13 +418,13 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 
 		uplane32 = compat_ptr(p);
 		if (!access_ok(VERIFY_READ, uplane32,
-				num_planes * sizeof(struct v4l2_plane32)))
+			       num_planes * sizeof(struct v4l2_plane32)))
 			return -EFAULT;
 
 		/* We don't really care if userspace decides to kill itself
 		 * by passing a very big num_planes value */
 		uplane = compat_alloc_user_space(num_planes *
-						sizeof(struct v4l2_plane));
+						 sizeof(struct v4l2_plane));
 		kp->m.planes = (__force struct v4l2_plane *)uplane;
 
 		while (--num_planes >= 0) {
@@ -442,12 +442,12 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 			break;
 		case V4L2_MEMORY_USERPTR:
 			{
-			compat_long_t tmp;
+				compat_long_t tmp;
 
-			if (get_user(tmp, &up->m.userptr))
-				return -EFAULT;
+				if (get_user(tmp, &up->m.userptr))
+					return -EFAULT;
 
-			kp->m.userptr = (unsigned long)compat_ptr(tmp);
+				kp->m.userptr = (unsigned long)compat_ptr(tmp);
 			}
 			break;
 		case V4L2_MEMORY_OVERLAY:
@@ -473,22 +473,22 @@ static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 	int ret;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
-		put_user(kp->index, &up->index) ||
-		put_user(kp->type, &up->type) ||
-		put_user(kp->flags, &up->flags) ||
-		put_user(kp->memory, &up->memory))
-			return -EFAULT;
+	    put_user(kp->index, &up->index) ||
+	    put_user(kp->type, &up->type) ||
+	    put_user(kp->flags, &up->flags) ||
+	    put_user(kp->memory, &up->memory))
+		return -EFAULT;
 
 	if (put_user(kp->bytesused, &up->bytesused) ||
-		put_user(kp->field, &up->field) ||
-		put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-		put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
-		copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
-		put_user(kp->sequence, &up->sequence) ||
-		put_user(kp->reserved2, &up->reserved2) ||
-		put_user(kp->reserved, &up->reserved) ||
-		put_user(kp->length, &up->length))
-			return -EFAULT;
+	    put_user(kp->field, &up->field) ||
+	    put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
+	    put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
+	    copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
+	    put_user(kp->sequence, &up->sequence) ||
+	    put_user(kp->reserved2, &up->reserved2) ||
+	    put_user(kp->reserved, &up->reserved) ||
+	    put_user(kp->length, &up->length))
+		return -EFAULT;
 
 	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
 		num_planes = kp->length;
@@ -552,11 +552,11 @@ static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_frame
 	u32 tmp;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
-		get_user(tmp, &up->base) ||
-		get_user(kp->capability, &up->capability) ||
-		get_user(kp->flags, &up->flags) ||
-		copy_from_user(&kp->fmt, &up->fmt, sizeof(up->fmt)))
-			return -EFAULT;
+	    get_user(tmp, &up->base) ||
+	    get_user(kp->capability, &up->capability) ||
+	    get_user(kp->flags, &up->flags) ||
+	    copy_from_user(&kp->fmt, &up->fmt, sizeof(up->fmt)))
+		return -EFAULT;
 	kp->base = (__force void *)compat_ptr(tmp);
 	return 0;
 }
@@ -566,11 +566,11 @@ static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_frame
 	u32 tmp = (u32)((unsigned long)kp->base);
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
-		put_user(tmp, &up->base) ||
-		put_user(kp->capability, &up->capability) ||
-		put_user(kp->flags, &up->flags) ||
-		copy_to_user(&up->fmt, &kp->fmt, sizeof(up->fmt)))
-			return -EFAULT;
+	    put_user(tmp, &up->base) ||
+	    put_user(kp->capability, &up->capability) ||
+	    put_user(kp->flags, &up->flags) ||
+	    copy_to_user(&up->fmt, &kp->fmt, sizeof(up->fmt)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -602,11 +602,11 @@ static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __
 }
 
 struct v4l2_ext_controls32 {
-       __u32 ctrl_class;
-       __u32 count;
-       __u32 error_idx;
-       __u32 reserved[2];
-       compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
+	__u32 ctrl_class;
+	__u32 count;
+	__u32 error_idx;
+	__u32 reserved[2];
+	compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
 };
 
 struct v4l2_ext_control32 {
@@ -645,11 +645,11 @@ static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
 	compat_caddr_t p;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
-		get_user(kp->ctrl_class, &up->ctrl_class) ||
-		get_user(kp->count, &up->count) ||
-		get_user(kp->error_idx, &up->error_idx) ||
-		copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
-			return -EFAULT;
+	    get_user(kp->ctrl_class, &up->ctrl_class) ||
+	    get_user(kp->count, &up->count) ||
+	    get_user(kp->error_idx, &up->error_idx) ||
+	    copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
+		return -EFAULT;
 	n = kp->count;
 	if (n == 0) {
 		kp->controls = NULL;
@@ -659,7 +659,7 @@ static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
 		return -EFAULT;
 	ucontrols = compat_ptr(p);
 	if (!access_ok(VERIFY_READ, ucontrols,
-			n * sizeof(struct v4l2_ext_control32)))
+		       n * sizeof(struct v4l2_ext_control32)))
 		return -EFAULT;
 	kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
 	kp->controls = (__force struct v4l2_ext_control *)kcontrols;
@@ -694,11 +694,11 @@ static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
 	compat_caddr_t p;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
-		put_user(kp->ctrl_class, &up->ctrl_class) ||
-		put_user(kp->count, &up->count) ||
-		put_user(kp->error_idx, &up->error_idx) ||
-		copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
-			return -EFAULT;
+	    put_user(kp->ctrl_class, &up->ctrl_class) ||
+	    put_user(kp->count, &up->count) ||
+	    put_user(kp->error_idx, &up->error_idx) ||
+	    copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
+		return -EFAULT;
 	if (!kp->count)
 		return 0;
 
@@ -706,7 +706,7 @@ static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
 		return -EFAULT;
 	ucontrols = compat_ptr(p);
 	if (!access_ok(VERIFY_WRITE, ucontrols,
-			n * sizeof(struct v4l2_ext_control32)))
+		       n * sizeof(struct v4l2_ext_control32)))
 		return -EFAULT;
 
 	while (--n >= 0) {
@@ -743,15 +743,15 @@ struct v4l2_event32 {
 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
-		put_user(kp->type, &up->type) ||
-		copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
-		put_user(kp->pending, &up->pending) ||
-		put_user(kp->sequence, &up->sequence) ||
-		put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-		put_user(kp->timestamp.tv_nsec, &up->timestamp.tv_nsec) ||
-		put_user(kp->id, &up->id) ||
-		copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
-			return -EFAULT;
+	    put_user(kp->type, &up->type) ||
+	    copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
+	    put_user(kp->pending, &up->pending) ||
+	    put_user(kp->sequence, &up->sequence) ||
+	    put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
+	    put_user(kp->timestamp.tv_nsec, &up->timestamp.tv_nsec) ||
+	    put_user(kp->id, &up->id) ||
+	    copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
+		return -EFAULT;
 	return 0;
 }
 
@@ -768,12 +768,12 @@ static int get_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
 	u32 tmp;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_edid32)) ||
-		get_user(kp->pad, &up->pad) ||
-		get_user(kp->start_block, &up->start_block) ||
-		get_user(kp->blocks, &up->blocks) ||
-		get_user(tmp, &up->edid) ||
-		copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
-			return -EFAULT;
+	    get_user(kp->pad, &up->pad) ||
+	    get_user(kp->start_block, &up->start_block) ||
+	    get_user(kp->blocks, &up->blocks) ||
+	    get_user(tmp, &up->edid) ||
+	    copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
+		return -EFAULT;
 	kp->edid = (__force u8 *)compat_ptr(tmp);
 	return 0;
 }
@@ -783,12 +783,12 @@ static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
 	u32 tmp = (u32)((unsigned long)kp->edid);
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_edid32)) ||
-		put_user(kp->pad, &up->pad) ||
-		put_user(kp->start_block, &up->start_block) ||
-		put_user(kp->blocks, &up->blocks) ||
-		put_user(tmp, &up->edid) ||
-		copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
-			return -EFAULT;
+	    put_user(kp->pad, &up->pad) ||
+	    put_user(kp->start_block, &up->start_block) ||
+	    put_user(kp->blocks, &up->blocks) ||
+	    put_user(tmp, &up->edid) ||
+	    copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
+		return -EFAULT;
 	return 0;
 }
 
-- 
2.14.3

[PATCH for v3.18 05/18] media: v4l2-compat-ioctl32.c: move 'helper' functions to __get/put_v4l2_format32

[Mauro Carvalho Chehab]

From: Hans Verkuil <hans.verkuil@cisco.com>

commit 486c521510c44a04cd756a9267e7d1e271c8a4ba upstream.

These helper functions do not really help. Move the code to the
__get/put_v4l2_format32 functions.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 84 +++++----------------------
 1 file changed, 16 insertions(+), 68 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index 866019bbf513..702757012dc7 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -89,64 +89,6 @@ static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user
 	return 0;
 }
 
-static inline int get_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
-{
-	if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int get_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
-					     struct v4l2_pix_format_mplane __user *up)
-{
-	if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format_mplane)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int put_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
-{
-	if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int put_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
-					     struct v4l2_pix_format_mplane __user *up)
-{
-	if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format_mplane)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int get_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
-{
-	if (copy_from_user(kp, up, sizeof(struct v4l2_vbi_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int put_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
-{
-	if (copy_to_user(up, kp, sizeof(struct v4l2_vbi_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int get_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up)
-{
-	if (copy_from_user(kp, up, sizeof(struct v4l2_sliced_vbi_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int put_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up)
-{
-	if (copy_to_user(up, kp, sizeof(struct v4l2_sliced_vbi_format)))
-		return -EFAULT;
-	return 0;
-}
-
 struct v4l2_format32 {
 	__u32	type;	/* enum v4l2_buf_type */
 	union {
@@ -184,20 +126,23 @@ static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __us
 	switch (kp->type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-		return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
+		return copy_from_user(&kp->fmt.pix, &up->fmt.pix,
+				      sizeof(kp->fmt.pix)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-		return get_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
-						  &up->fmt.pix_mp);
+		return copy_from_user(&kp->fmt.pix_mp, &up->fmt.pix_mp,
+				      sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 		return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_VBI_OUTPUT:
-		return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
+		return copy_from_user(&kp->fmt.vbi, &up->fmt.vbi,
+				      sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
-		return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
+		return copy_from_user(&kp->fmt.sliced, &up->fmt.sliced,
+				      sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 	default:
 		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
 		       kp->type);
@@ -225,20 +170,23 @@ static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __us
 	switch (kp->type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-		return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
+		return copy_to_user(&up->fmt.pix, &kp->fmt.pix,
+				    sizeof(kp->fmt.pix)) ?  -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-		return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
-						  &up->fmt.pix_mp);
+		return copy_to_user(&up->fmt.pix_mp, &kp->fmt.pix_mp,
+				    sizeof(kp->fmt.pix_mp)) ?  -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 		return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_VBI_OUTPUT:
-		return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
+		return copy_to_user(&up->fmt.vbi, &kp->fmt.vbi,
+				    sizeof(kp->fmt.vbi)) ?  -EFAULT : 0;
 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
-		return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
+		return copy_to_user(&up->fmt.sliced, &kp->fmt.sliced,
+				    sizeof(kp->fmt.sliced)) ?  -EFAULT : 0;
 	default:
 		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
 		       kp->type);
-- 
2.14.3

Patch "media: v4l2-compat-ioctl32.c: move 'helper' functions to __get/put_v4l2_format32" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: move 'helper' functions to __get/put_v4l2_format32

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:24 -0300
Subject: media: v4l2-compat-ioctl32.c: move 'helper' functions to __get/put_v4l2_format32
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <eba66edbe4ca94e61e342683ee5e225f376d754c.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

commit 486c521510c44a04cd756a9267e7d1e271c8a4ba upstream.

These helper functions do not really help. Move the code to the
__get/put_v4l2_format32 functions.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |   84 ++++----------------------
 1 file changed, 16 insertions(+), 68 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -89,64 +89,6 @@ static int put_v4l2_window32(struct v4l2
 	return 0;
 }
 
-static inline int get_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
-{
-	if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int get_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
-					     struct v4l2_pix_format_mplane __user *up)
-{
-	if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format_mplane)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int put_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
-{
-	if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int put_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
-					     struct v4l2_pix_format_mplane __user *up)
-{
-	if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format_mplane)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int get_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
-{
-	if (copy_from_user(kp, up, sizeof(struct v4l2_vbi_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int put_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
-{
-	if (copy_to_user(up, kp, sizeof(struct v4l2_vbi_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int get_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up)
-{
-	if (copy_from_user(kp, up, sizeof(struct v4l2_sliced_vbi_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int put_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up)
-{
-	if (copy_to_user(up, kp, sizeof(struct v4l2_sliced_vbi_format)))
-		return -EFAULT;
-	return 0;
-}
-
 struct v4l2_format32 {
 	__u32	type;	/* enum v4l2_buf_type */
 	union {
@@ -184,20 +126,23 @@ static int __get_v4l2_format32(struct v4
 	switch (kp->type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-		return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
+		return copy_from_user(&kp->fmt.pix, &up->fmt.pix,
+				      sizeof(kp->fmt.pix)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-		return get_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
-						  &up->fmt.pix_mp);
+		return copy_from_user(&kp->fmt.pix_mp, &up->fmt.pix_mp,
+				      sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 		return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_VBI_OUTPUT:
-		return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
+		return copy_from_user(&kp->fmt.vbi, &up->fmt.vbi,
+				      sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
-		return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
+		return copy_from_user(&kp->fmt.sliced, &up->fmt.sliced,
+				      sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 	default:
 		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
 		       kp->type);
@@ -225,20 +170,23 @@ static int __put_v4l2_format32(struct v4
 	switch (kp->type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-		return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
+		return copy_to_user(&up->fmt.pix, &kp->fmt.pix,
+				    sizeof(kp->fmt.pix)) ?  -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-		return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
-						  &up->fmt.pix_mp);
+		return copy_to_user(&up->fmt.pix_mp, &kp->fmt.pix_mp,
+				    sizeof(kp->fmt.pix_mp)) ?  -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 		return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_VBI_OUTPUT:
-		return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
+		return copy_to_user(&up->fmt.vbi, &kp->fmt.vbi,
+				    sizeof(kp->fmt.vbi)) ?  -EFAULT : 0;
 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
-		return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
+		return copy_to_user(&up->fmt.sliced, &kp->fmt.sliced,
+				    sizeof(kp->fmt.sliced)) ?  -EFAULT : 0;
 	default:
 		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
 		       kp->type);


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

Patch "media: v4l2-compat-ioctl32.c: move 'helper' functions to __get/put_v4l2_format32" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: move 'helper' functions to __get/put_v4l2_format32

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:24 -0300
Subject: media: v4l2-compat-ioctl32.c: move 'helper' functions to __get/put_v4l2_format32
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <eba66edbe4ca94e61e342683ee5e225f376d754c.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

commit 486c521510c44a04cd756a9267e7d1e271c8a4ba upstream.

These helper functions do not really help. Move the code to the
__get/put_v4l2_format32 functions.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |   84 ++++----------------------
 1 file changed, 16 insertions(+), 68 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -89,64 +89,6 @@ static int put_v4l2_window32(struct v4l2
 	return 0;
 }
 
-static inline int get_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
-{
-	if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int get_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
-					     struct v4l2_pix_format_mplane __user *up)
-{
-	if (copy_from_user(kp, up, sizeof(struct v4l2_pix_format_mplane)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int put_v4l2_pix_format(struct v4l2_pix_format *kp, struct v4l2_pix_format __user *up)
-{
-	if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int put_v4l2_pix_format_mplane(struct v4l2_pix_format_mplane *kp,
-					     struct v4l2_pix_format_mplane __user *up)
-{
-	if (copy_to_user(up, kp, sizeof(struct v4l2_pix_format_mplane)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int get_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
-{
-	if (copy_from_user(kp, up, sizeof(struct v4l2_vbi_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int put_v4l2_vbi_format(struct v4l2_vbi_format *kp, struct v4l2_vbi_format __user *up)
-{
-	if (copy_to_user(up, kp, sizeof(struct v4l2_vbi_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int get_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up)
-{
-	if (copy_from_user(kp, up, sizeof(struct v4l2_sliced_vbi_format)))
-		return -EFAULT;
-	return 0;
-}
-
-static inline int put_v4l2_sliced_vbi_format(struct v4l2_sliced_vbi_format *kp, struct v4l2_sliced_vbi_format __user *up)
-{
-	if (copy_to_user(up, kp, sizeof(struct v4l2_sliced_vbi_format)))
-		return -EFAULT;
-	return 0;
-}
-
 struct v4l2_format32 {
 	__u32	type;	/* enum v4l2_buf_type */
 	union {
@@ -184,20 +126,23 @@ static int __get_v4l2_format32(struct v4
 	switch (kp->type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-		return get_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
+		return copy_from_user(&kp->fmt.pix, &up->fmt.pix,
+				      sizeof(kp->fmt.pix)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-		return get_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
-						  &up->fmt.pix_mp);
+		return copy_from_user(&kp->fmt.pix_mp, &up->fmt.pix_mp,
+				      sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 		return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_VBI_OUTPUT:
-		return get_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
+		return copy_from_user(&kp->fmt.vbi, &up->fmt.vbi,
+				      sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
-		return get_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
+		return copy_from_user(&kp->fmt.sliced, &up->fmt.sliced,
+				      sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 	default:
 		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
 		       kp->type);
@@ -225,20 +170,23 @@ static int __put_v4l2_format32(struct v4
 	switch (kp->type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-		return put_v4l2_pix_format(&kp->fmt.pix, &up->fmt.pix);
+		return copy_to_user(&up->fmt.pix, &kp->fmt.pix,
+				    sizeof(kp->fmt.pix)) ?  -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-		return put_v4l2_pix_format_mplane(&kp->fmt.pix_mp,
-						  &up->fmt.pix_mp);
+		return copy_to_user(&up->fmt.pix_mp, &kp->fmt.pix_mp,
+				    sizeof(kp->fmt.pix_mp)) ?  -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 		return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_VBI_OUTPUT:
-		return put_v4l2_vbi_format(&kp->fmt.vbi, &up->fmt.vbi);
+		return copy_to_user(&up->fmt.vbi, &kp->fmt.vbi,
+				    sizeof(kp->fmt.vbi)) ?  -EFAULT : 0;
 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
-		return put_v4l2_sliced_vbi_format(&kp->fmt.sliced, &up->fmt.sliced);
+		return copy_to_user(&up->fmt.sliced, &kp->fmt.sliced,
+				    sizeof(kp->fmt.sliced)) ?  -EFAULT : 0;
 	default:
 		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
 		       kp->type);


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 06/18] media: v4l2-compat-ioctl32.c: avoid sizeof(type)

[Mauro Carvalho Chehab]

From: Hans Verkuil <hans.verkuil@cisco.com>

commit 333b1e9f96ce05f7498b581509bb30cde03018bf upstream.

Instead of doing sizeof(struct foo) use sizeof(*up). There even were
cases where 4 * sizeof(__u32) was used instead of sizeof(kp->reserved),
which is very dangerous when the size of the reserved array changes.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 80 +++++++++++++--------------
 1 file changed, 38 insertions(+), 42 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index 702757012dc7..b7dd98168a68 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -47,7 +47,7 @@ struct v4l2_window32 {
 
 static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
 {
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_window32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
 	    get_user(kp->field, &up->field) ||
 	    get_user(kp->chromakey, &up->chromakey) ||
@@ -64,7 +64,7 @@ static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user
 		if (get_user(p, &up->clips))
 			return -EFAULT;
 		uclips = compat_ptr(p);
-		kclips = compat_alloc_user_space(n * sizeof(struct v4l2_clip));
+		kclips = compat_alloc_user_space(n * sizeof(*kclips));
 		kp->clips = kclips;
 		while (--n >= 0) {
 			if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
@@ -152,14 +152,14 @@ static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __us
 
 static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
 {
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_format32)))
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 		return -EFAULT;
 	return __get_v4l2_format32(kp, up);
 }
 
 static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
 {
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_create_buffers32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format)))
 		return -EFAULT;
 	return __get_v4l2_format32(&kp->format, &up->format);
@@ -196,17 +196,17 @@ static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __us
 
 static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
 {
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32)) ||
-		put_user(kp->type, &up->type))
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
 		return -EFAULT;
 	return __put_v4l2_format32(kp, up);
 }
 
 static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
 {
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_create_buffers32)) ||
-	    copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format.fmt)))
-			return -EFAULT;
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
+	    copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format)) ||
+	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
+		return -EFAULT;
 	return __put_v4l2_format32(&kp->format, &up->format);
 }
 
@@ -222,7 +222,7 @@ struct v4l2_standard32 {
 static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
 {
 	/* other fields are not set by the user, nor used by the driver */
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(kp->index, &up->index))
 		return -EFAULT;
 	return 0;
@@ -230,13 +230,13 @@ static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32
 
 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
 {
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 	    put_user(kp->index, &up->index) ||
 	    copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
-	    copy_to_user(up->name, kp->name, 24) ||
+	    copy_to_user(up->name, kp->name, sizeof(up->name)) ||
 	    copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
 	    put_user(kp->framelines, &up->framelines) ||
-	    copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
+	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -284,7 +284,7 @@ static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __
 
 	if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
 	    copy_in_user(&up->data_offset, &up32->data_offset,
-			 sizeof(__u32)))
+			 sizeof(up->data_offset)))
 		return -EFAULT;
 
 	if (memory == V4L2_MEMORY_USERPTR) {
@@ -294,11 +294,11 @@ static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __
 		if (put_user((unsigned long)up_pln, &up->m.userptr))
 			return -EFAULT;
 	} else if (memory == V4L2_MEMORY_DMABUF) {
-		if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(int)))
+		if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(up32->m.fd)))
 			return -EFAULT;
 	} else {
 		if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
-				 sizeof(__u32)))
+				 sizeof(up32->m.mem_offset)))
 			return -EFAULT;
 	}
 
@@ -310,19 +310,19 @@ static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __
 {
 	if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
 	    copy_in_user(&up32->data_offset, &up->data_offset,
-			 sizeof(__u32)))
+			 sizeof(up->data_offset)))
 		return -EFAULT;
 
 	/* For MMAP, driver might've set up the offset, so copy it back.
 	 * USERPTR stays the same (was userspace-provided), so no copying. */
 	if (memory == V4L2_MEMORY_MMAP)
 		if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
-				 sizeof(__u32)))
+				 sizeof(up->m.mem_offset)))
 			return -EFAULT;
 	/* For DMABUF, driver might've set up the fd, so copy it back. */
 	if (memory == V4L2_MEMORY_DMABUF)
 		if (copy_in_user(&up32->m.fd, &up->m.fd,
-				 sizeof(int)))
+				 sizeof(up->m.fd)))
 			return -EFAULT;
 
 	return 0;
@@ -336,7 +336,7 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 	int num_planes;
 	int ret;
 
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(kp->index, &up->index) ||
 	    get_user(kp->type, &up->type) ||
 	    get_user(kp->flags, &up->flags) ||
@@ -348,8 +348,7 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 		if (get_user(kp->bytesused, &up->bytesused) ||
 		    get_user(kp->field, &up->field) ||
 		    get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-		    get_user(kp->timestamp.tv_usec,
-			     &up->timestamp.tv_usec))
+		    get_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec))
 			return -EFAULT;
 
 	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
@@ -366,13 +365,12 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 
 		uplane32 = compat_ptr(p);
 		if (!access_ok(VERIFY_READ, uplane32,
-			       num_planes * sizeof(struct v4l2_plane32)))
+			       num_planes * sizeof(*uplane32)))
 			return -EFAULT;
 
 		/* We don't really care if userspace decides to kill itself
 		 * by passing a very big num_planes value */
-		uplane = compat_alloc_user_space(num_planes *
-						 sizeof(struct v4l2_plane));
+		uplane = compat_alloc_user_space(num_planes * sizeof(*uplane));
 		kp->m.planes = (__force struct v4l2_plane *)uplane;
 
 		while (--num_planes >= 0) {
@@ -420,7 +418,7 @@ static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 	int num_planes;
 	int ret;
 
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 	    put_user(kp->index, &up->index) ||
 	    put_user(kp->type, &up->type) ||
 	    put_user(kp->flags, &up->flags) ||
@@ -431,7 +429,7 @@ static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 	    put_user(kp->field, &up->field) ||
 	    put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
 	    put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
-	    copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
+	    copy_to_user(&up->timecode, &kp->timecode, sizeof(kp->timecode)) ||
 	    put_user(kp->sequence, &up->sequence) ||
 	    put_user(kp->reserved2, &up->reserved2) ||
 	    put_user(kp->reserved, &up->reserved) ||
@@ -499,7 +497,7 @@ static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_frame
 {
 	u32 tmp;
 
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(tmp, &up->base) ||
 	    get_user(kp->capability, &up->capability) ||
 	    get_user(kp->flags, &up->flags) ||
@@ -513,7 +511,7 @@ static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_frame
 {
 	u32 tmp = (u32)((unsigned long)kp->base);
 
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 	    put_user(tmp, &up->base) ||
 	    put_user(kp->capability, &up->capability) ||
 	    put_user(kp->flags, &up->flags) ||
@@ -537,14 +535,14 @@ struct v4l2_input32 {
    Otherwise it is identical to the 32-bit version. */
 static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
 {
-	if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
+	if (copy_from_user(kp, up, sizeof(*up)))
 		return -EFAULT;
 	return 0;
 }
 
 static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
 {
-	if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
+	if (copy_to_user(up, kp, sizeof(*up)))
 		return -EFAULT;
 	return 0;
 }
@@ -592,7 +590,7 @@ static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
 	int n;
 	compat_caddr_t p;
 
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(kp->ctrl_class, &up->ctrl_class) ||
 	    get_user(kp->count, &up->count) ||
 	    get_user(kp->error_idx, &up->error_idx) ||
@@ -606,10 +604,9 @@ static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
 	if (get_user(p, &up->controls))
 		return -EFAULT;
 	ucontrols = compat_ptr(p);
-	if (!access_ok(VERIFY_READ, ucontrols,
-		       n * sizeof(struct v4l2_ext_control32)))
+	if (!access_ok(VERIFY_READ, ucontrols, n * sizeof(*ucontrols)))
 		return -EFAULT;
-	kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
+	kcontrols = compat_alloc_user_space(n * sizeof(*kcontrols));
 	kp->controls = (__force struct v4l2_ext_control *)kcontrols;
 	while (--n >= 0) {
 		u32 id;
@@ -641,7 +638,7 @@ static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
 	int n = kp->count;
 	compat_caddr_t p;
 
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 	    put_user(kp->ctrl_class, &up->ctrl_class) ||
 	    put_user(kp->count, &up->count) ||
 	    put_user(kp->error_idx, &up->error_idx) ||
@@ -653,8 +650,7 @@ static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
 	if (get_user(p, &up->controls))
 		return -EFAULT;
 	ucontrols = compat_ptr(p);
-	if (!access_ok(VERIFY_WRITE, ucontrols,
-		       n * sizeof(struct v4l2_ext_control32)))
+	if (!access_ok(VERIFY_WRITE, ucontrols, n * sizeof(*ucontrols)))
 		return -EFAULT;
 
 	while (--n >= 0) {
@@ -690,7 +686,7 @@ struct v4l2_event32 {
 
 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
 {
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 	    put_user(kp->type, &up->type) ||
 	    copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
 	    put_user(kp->pending, &up->pending) ||
@@ -698,7 +694,7 @@ static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *u
 	    put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
 	    put_user(kp->timestamp.tv_nsec, &up->timestamp.tv_nsec) ||
 	    put_user(kp->id, &up->id) ||
-	    copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
+	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -715,7 +711,7 @@ static int get_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
 {
 	u32 tmp;
 
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_edid32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(kp->pad, &up->pad) ||
 	    get_user(kp->start_block, &up->start_block) ||
 	    get_user(kp->blocks, &up->blocks) ||
@@ -730,7 +726,7 @@ static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
 {
 	u32 tmp = (u32)((unsigned long)kp->edid);
 
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_edid32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 	    put_user(kp->pad, &up->pad) ||
 	    put_user(kp->start_block, &up->start_block) ||
 	    put_user(kp->blocks, &up->blocks) ||
-- 
2.14.3

Patch "media: v4l2-compat-ioctl32.c: avoid sizeof(type)" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: avoid sizeof(type)

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:25 -0300
Subject: media: v4l2-compat-ioctl32.c: avoid sizeof(type)
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <b2ea40bb0147ce21cf35781d842cba0d60f7e07f.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

commit 333b1e9f96ce05f7498b581509bb30cde03018bf upstream.

Instead of doing sizeof(struct foo) use sizeof(*up). There even were
cases where 4 * sizeof(__u32) was used instead of sizeof(kp->reserved),
which is very dangerous when the size of the reserved array changes.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |   80 ++++++++++++--------------
 1 file changed, 38 insertions(+), 42 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -47,7 +47,7 @@ struct v4l2_window32 {
 
 static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
 {
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_window32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
 	    get_user(kp->field, &up->field) ||
 	    get_user(kp->chromakey, &up->chromakey) ||
@@ -64,7 +64,7 @@ static int get_v4l2_window32(struct v4l2
 		if (get_user(p, &up->clips))
 			return -EFAULT;
 		uclips = compat_ptr(p);
-		kclips = compat_alloc_user_space(n * sizeof(struct v4l2_clip));
+		kclips = compat_alloc_user_space(n * sizeof(*kclips));
 		kp->clips = kclips;
 		while (--n >= 0) {
 			if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
@@ -152,14 +152,14 @@ static int __get_v4l2_format32(struct v4
 
 static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
 {
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_format32)))
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 		return -EFAULT;
 	return __get_v4l2_format32(kp, up);
 }
 
 static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
 {
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_create_buffers32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format)))
 		return -EFAULT;
 	return __get_v4l2_format32(&kp->format, &up->format);
@@ -196,17 +196,17 @@ static int __put_v4l2_format32(struct v4
 
 static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
 {
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_format32)) ||
-		put_user(kp->type, &up->type))
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
 		return -EFAULT;
 	return __put_v4l2_format32(kp, up);
 }
 
 static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
 {
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_create_buffers32)) ||
-	    copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format.fmt)))
-			return -EFAULT;
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
+	    copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format)) ||
+	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
+		return -EFAULT;
 	return __put_v4l2_format32(&kp->format, &up->format);
 }
 
@@ -222,7 +222,7 @@ struct v4l2_standard32 {
 static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
 {
 	/* other fields are not set by the user, nor used by the driver */
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_standard32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(kp->index, &up->index))
 		return -EFAULT;
 	return 0;
@@ -230,13 +230,13 @@ static int get_v4l2_standard32(struct v4
 
 static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
 {
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_standard32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 	    put_user(kp->index, &up->index) ||
 	    copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
-	    copy_to_user(up->name, kp->name, 24) ||
+	    copy_to_user(up->name, kp->name, sizeof(up->name)) ||
 	    copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
 	    put_user(kp->framelines, &up->framelines) ||
-	    copy_to_user(up->reserved, kp->reserved, 4 * sizeof(__u32)))
+	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -284,7 +284,7 @@ static int get_v4l2_plane32(struct v4l2_
 
 	if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
 	    copy_in_user(&up->data_offset, &up32->data_offset,
-			 sizeof(__u32)))
+			 sizeof(up->data_offset)))
 		return -EFAULT;
 
 	if (memory == V4L2_MEMORY_USERPTR) {
@@ -294,11 +294,11 @@ static int get_v4l2_plane32(struct v4l2_
 		if (put_user((unsigned long)up_pln, &up->m.userptr))
 			return -EFAULT;
 	} else if (memory == V4L2_MEMORY_DMABUF) {
-		if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(int)))
+		if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(up32->m.fd)))
 			return -EFAULT;
 	} else {
 		if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
-				 sizeof(__u32)))
+				 sizeof(up32->m.mem_offset)))
 			return -EFAULT;
 	}
 
@@ -310,19 +310,19 @@ static int put_v4l2_plane32(struct v4l2_
 {
 	if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
 	    copy_in_user(&up32->data_offset, &up->data_offset,
-			 sizeof(__u32)))
+			 sizeof(up->data_offset)))
 		return -EFAULT;
 
 	/* For MMAP, driver might've set up the offset, so copy it back.
 	 * USERPTR stays the same (was userspace-provided), so no copying. */
 	if (memory == V4L2_MEMORY_MMAP)
 		if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
-				 sizeof(__u32)))
+				 sizeof(up->m.mem_offset)))
 			return -EFAULT;
 	/* For DMABUF, driver might've set up the fd, so copy it back. */
 	if (memory == V4L2_MEMORY_DMABUF)
 		if (copy_in_user(&up32->m.fd, &up->m.fd,
-				 sizeof(int)))
+				 sizeof(up->m.fd)))
 			return -EFAULT;
 
 	return 0;
@@ -336,7 +336,7 @@ static int get_v4l2_buffer32(struct v4l2
 	int num_planes;
 	int ret;
 
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_buffer32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(kp->index, &up->index) ||
 	    get_user(kp->type, &up->type) ||
 	    get_user(kp->flags, &up->flags) ||
@@ -348,8 +348,7 @@ static int get_v4l2_buffer32(struct v4l2
 		if (get_user(kp->bytesused, &up->bytesused) ||
 		    get_user(kp->field, &up->field) ||
 		    get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-		    get_user(kp->timestamp.tv_usec,
-			     &up->timestamp.tv_usec))
+		    get_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec))
 			return -EFAULT;
 
 	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
@@ -366,13 +365,12 @@ static int get_v4l2_buffer32(struct v4l2
 
 		uplane32 = compat_ptr(p);
 		if (!access_ok(VERIFY_READ, uplane32,
-			       num_planes * sizeof(struct v4l2_plane32)))
+			       num_planes * sizeof(*uplane32)))
 			return -EFAULT;
 
 		/* We don't really care if userspace decides to kill itself
 		 * by passing a very big num_planes value */
-		uplane = compat_alloc_user_space(num_planes *
-						 sizeof(struct v4l2_plane));
+		uplane = compat_alloc_user_space(num_planes * sizeof(*uplane));
 		kp->m.planes = (__force struct v4l2_plane *)uplane;
 
 		while (--num_planes >= 0) {
@@ -420,7 +418,7 @@ static int put_v4l2_buffer32(struct v4l2
 	int num_planes;
 	int ret;
 
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_buffer32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 	    put_user(kp->index, &up->index) ||
 	    put_user(kp->type, &up->type) ||
 	    put_user(kp->flags, &up->flags) ||
@@ -431,7 +429,7 @@ static int put_v4l2_buffer32(struct v4l2
 	    put_user(kp->field, &up->field) ||
 	    put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
 	    put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
-	    copy_to_user(&up->timecode, &kp->timecode, sizeof(struct v4l2_timecode)) ||
+	    copy_to_user(&up->timecode, &kp->timecode, sizeof(kp->timecode)) ||
 	    put_user(kp->sequence, &up->sequence) ||
 	    put_user(kp->reserved2, &up->reserved2) ||
 	    put_user(kp->reserved, &up->reserved) ||
@@ -499,7 +497,7 @@ static int get_v4l2_framebuffer32(struct
 {
 	u32 tmp;
 
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_framebuffer32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(tmp, &up->base) ||
 	    get_user(kp->capability, &up->capability) ||
 	    get_user(kp->flags, &up->flags) ||
@@ -513,7 +511,7 @@ static int put_v4l2_framebuffer32(struct
 {
 	u32 tmp = (u32)((unsigned long)kp->base);
 
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_framebuffer32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 	    put_user(tmp, &up->base) ||
 	    put_user(kp->capability, &up->capability) ||
 	    put_user(kp->flags, &up->flags) ||
@@ -537,14 +535,14 @@ struct v4l2_input32 {
    Otherwise it is identical to the 32-bit version. */
 static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
 {
-	if (copy_from_user(kp, up, sizeof(struct v4l2_input32)))
+	if (copy_from_user(kp, up, sizeof(*up)))
 		return -EFAULT;
 	return 0;
 }
 
 static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
 {
-	if (copy_to_user(up, kp, sizeof(struct v4l2_input32)))
+	if (copy_to_user(up, kp, sizeof(*up)))
 		return -EFAULT;
 	return 0;
 }
@@ -592,7 +590,7 @@ static int get_v4l2_ext_controls32(struc
 	int n;
 	compat_caddr_t p;
 
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_ext_controls32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(kp->ctrl_class, &up->ctrl_class) ||
 	    get_user(kp->count, &up->count) ||
 	    get_user(kp->error_idx, &up->error_idx) ||
@@ -606,10 +604,9 @@ static int get_v4l2_ext_controls32(struc
 	if (get_user(p, &up->controls))
 		return -EFAULT;
 	ucontrols = compat_ptr(p);
-	if (!access_ok(VERIFY_READ, ucontrols,
-		       n * sizeof(struct v4l2_ext_control32)))
+	if (!access_ok(VERIFY_READ, ucontrols, n * sizeof(*ucontrols)))
 		return -EFAULT;
-	kcontrols = compat_alloc_user_space(n * sizeof(struct v4l2_ext_control));
+	kcontrols = compat_alloc_user_space(n * sizeof(*kcontrols));
 	kp->controls = (__force struct v4l2_ext_control *)kcontrols;
 	while (--n >= 0) {
 		u32 id;
@@ -641,7 +638,7 @@ static int put_v4l2_ext_controls32(struc
 	int n = kp->count;
 	compat_caddr_t p;
 
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_ext_controls32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 	    put_user(kp->ctrl_class, &up->ctrl_class) ||
 	    put_user(kp->count, &up->count) ||
 	    put_user(kp->error_idx, &up->error_idx) ||
@@ -653,8 +650,7 @@ static int put_v4l2_ext_controls32(struc
 	if (get_user(p, &up->controls))
 		return -EFAULT;
 	ucontrols = compat_ptr(p);
-	if (!access_ok(VERIFY_WRITE, ucontrols,
-		       n * sizeof(struct v4l2_ext_control32)))
+	if (!access_ok(VERIFY_WRITE, ucontrols, n * sizeof(*ucontrols)))
 		return -EFAULT;
 
 	while (--n >= 0) {
@@ -690,7 +686,7 @@ struct v4l2_event32 {
 
 static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
 {
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_event32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 	    put_user(kp->type, &up->type) ||
 	    copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
 	    put_user(kp->pending, &up->pending) ||
@@ -698,7 +694,7 @@ static int put_v4l2_event32(struct v4l2_
 	    put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
 	    put_user(kp->timestamp.tv_nsec, &up->timestamp.tv_nsec) ||
 	    put_user(kp->id, &up->id) ||
-	    copy_to_user(up->reserved, kp->reserved, 8 * sizeof(__u32)))
+	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -715,7 +711,7 @@ static int get_v4l2_edid32(struct v4l2_e
 {
 	u32 tmp;
 
-	if (!access_ok(VERIFY_READ, up, sizeof(struct v4l2_edid32)) ||
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(kp->pad, &up->pad) ||
 	    get_user(kp->start_block, &up->start_block) ||
 	    get_user(kp->blocks, &up->blocks) ||
@@ -730,7 +726,7 @@ static int put_v4l2_edid32(struct v4l2_e
 {
 	u32 tmp = (u32)((unsigned long)kp->edid);
 
-	if (!access_ok(VERIFY_WRITE, up, sizeof(struct v4l2_edid32)) ||
+	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
 	    put_user(kp->pad, &up->pad) ||
 	    put_user(kp->start_block, &up->start_block) ||
 	    put_user(kp->blocks, &up->blocks) ||


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 07/18] media: v4l2-compat-ioctl32.c: copy m.userptr in put_v4l2_plane32

[Mauro Carvalho Chehab]

From: Hans Verkuil <hans.verkuil@cisco.com>

commit 8ed5a59dcb47a6f76034ee760b36e089f3e82529 upstream.

The struct v4l2_plane32 should set m.userptr as well. The same
happens in v4l2_buffer32 and v4l2-compliance tests for this.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 47 ++++++++++++++++-----------
 1 file changed, 28 insertions(+), 19 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index b7dd98168a68..a27fd9105948 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -287,19 +287,24 @@ static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __
 			 sizeof(up->data_offset)))
 		return -EFAULT;
 
-	if (memory == V4L2_MEMORY_USERPTR) {
+	switch (memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
+				 sizeof(up32->m.mem_offset)))
+			return -EFAULT;
+		break;
+	case V4L2_MEMORY_USERPTR:
 		if (get_user(p, &up32->m.userptr))
 			return -EFAULT;
 		up_pln = compat_ptr(p);
 		if (put_user((unsigned long)up_pln, &up->m.userptr))
 			return -EFAULT;
-	} else if (memory == V4L2_MEMORY_DMABUF) {
+		break;
+	case V4L2_MEMORY_DMABUF:
 		if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(up32->m.fd)))
 			return -EFAULT;
-	} else {
-		if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
-				 sizeof(up32->m.mem_offset)))
-			return -EFAULT;
+		break;
 	}
 
 	return 0;
@@ -308,22 +313,32 @@ static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __
 static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
 			    enum v4l2_memory memory)
 {
+	unsigned long p;
+
 	if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
 	    copy_in_user(&up32->data_offset, &up->data_offset,
 			 sizeof(up->data_offset)))
 		return -EFAULT;
 
-	/* For MMAP, driver might've set up the offset, so copy it back.
-	 * USERPTR stays the same (was userspace-provided), so no copying. */
-	if (memory == V4L2_MEMORY_MMAP)
+	switch (memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
 		if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
 				 sizeof(up->m.mem_offset)))
 			return -EFAULT;
-	/* For DMABUF, driver might've set up the fd, so copy it back. */
-	if (memory == V4L2_MEMORY_DMABUF)
+		break;
+	case V4L2_MEMORY_USERPTR:
+		if (get_user(p, &up->m.userptr) ||
+		    put_user((compat_ulong_t)ptr_to_compat((__force void *)p),
+			     &up32->m.userptr))
+			return -EFAULT;
+		break;
+	case V4L2_MEMORY_DMABUF:
 		if (copy_in_user(&up32->m.fd, &up->m.fd,
 				 sizeof(up->m.fd)))
 			return -EFAULT;
+		break;
+	}
 
 	return 0;
 }
@@ -383,6 +398,7 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 	} else {
 		switch (kp->memory) {
 		case V4L2_MEMORY_MMAP:
+		case V4L2_MEMORY_OVERLAY:
 			if (get_user(kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
@@ -396,10 +412,6 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 				kp->m.userptr = (unsigned long)compat_ptr(tmp);
 			}
 			break;
-		case V4L2_MEMORY_OVERLAY:
-			if (get_user(kp->m.offset, &up->m.offset))
-				return -EFAULT;
-			break;
 		case V4L2_MEMORY_DMABUF:
 			if (get_user(kp->m.fd, &up->m.fd))
 				return -EFAULT;
@@ -456,6 +468,7 @@ static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 	} else {
 		switch (kp->memory) {
 		case V4L2_MEMORY_MMAP:
+		case V4L2_MEMORY_OVERLAY:
 			if (put_user(kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
@@ -463,10 +476,6 @@ static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 			if (put_user(kp->m.userptr, &up->m.userptr))
 				return -EFAULT;
 			break;
-		case V4L2_MEMORY_OVERLAY:
-			if (put_user(kp->m.offset, &up->m.offset))
-				return -EFAULT;
-			break;
 		case V4L2_MEMORY_DMABUF:
 			if (put_user(kp->m.fd, &up->m.fd))
 				return -EFAULT;
-- 
2.14.3

Patch "media: v4l2-compat-ioctl32.c: copy m.userptr in put_v4l2_plane32" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: copy m.userptr in put_v4l2_plane32

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:26 -0300
Subject: media: v4l2-compat-ioctl32.c: copy m.userptr in put_v4l2_plane32
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <6e6f38fc8542cf41fffcd3067026c4f015564544.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

commit 8ed5a59dcb47a6f76034ee760b36e089f3e82529 upstream.

The struct v4l2_plane32 should set m.userptr as well. The same
happens in v4l2_buffer32 and v4l2-compliance tests for this.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |   47 +++++++++++++++-----------
 1 file changed, 28 insertions(+), 19 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -287,19 +287,24 @@ static int get_v4l2_plane32(struct v4l2_
 			 sizeof(up->data_offset)))
 		return -EFAULT;
 
-	if (memory == V4L2_MEMORY_USERPTR) {
+	switch (memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
+				 sizeof(up32->m.mem_offset)))
+			return -EFAULT;
+		break;
+	case V4L2_MEMORY_USERPTR:
 		if (get_user(p, &up32->m.userptr))
 			return -EFAULT;
 		up_pln = compat_ptr(p);
 		if (put_user((unsigned long)up_pln, &up->m.userptr))
 			return -EFAULT;
-	} else if (memory == V4L2_MEMORY_DMABUF) {
+		break;
+	case V4L2_MEMORY_DMABUF:
 		if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(up32->m.fd)))
 			return -EFAULT;
-	} else {
-		if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
-				 sizeof(up32->m.mem_offset)))
-			return -EFAULT;
+		break;
 	}
 
 	return 0;
@@ -308,22 +313,32 @@ static int get_v4l2_plane32(struct v4l2_
 static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
 			    enum v4l2_memory memory)
 {
+	unsigned long p;
+
 	if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
 	    copy_in_user(&up32->data_offset, &up->data_offset,
 			 sizeof(up->data_offset)))
 		return -EFAULT;
 
-	/* For MMAP, driver might've set up the offset, so copy it back.
-	 * USERPTR stays the same (was userspace-provided), so no copying. */
-	if (memory == V4L2_MEMORY_MMAP)
+	switch (memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
 		if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
 				 sizeof(up->m.mem_offset)))
 			return -EFAULT;
-	/* For DMABUF, driver might've set up the fd, so copy it back. */
-	if (memory == V4L2_MEMORY_DMABUF)
+		break;
+	case V4L2_MEMORY_USERPTR:
+		if (get_user(p, &up->m.userptr) ||
+		    put_user((compat_ulong_t)ptr_to_compat((__force void *)p),
+			     &up32->m.userptr))
+			return -EFAULT;
+		break;
+	case V4L2_MEMORY_DMABUF:
 		if (copy_in_user(&up32->m.fd, &up->m.fd,
 				 sizeof(up->m.fd)))
 			return -EFAULT;
+		break;
+	}
 
 	return 0;
 }
@@ -383,6 +398,7 @@ static int get_v4l2_buffer32(struct v4l2
 	} else {
 		switch (kp->memory) {
 		case V4L2_MEMORY_MMAP:
+		case V4L2_MEMORY_OVERLAY:
 			if (get_user(kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
@@ -396,10 +412,6 @@ static int get_v4l2_buffer32(struct v4l2
 				kp->m.userptr = (unsigned long)compat_ptr(tmp);
 			}
 			break;
-		case V4L2_MEMORY_OVERLAY:
-			if (get_user(kp->m.offset, &up->m.offset))
-				return -EFAULT;
-			break;
 		case V4L2_MEMORY_DMABUF:
 			if (get_user(kp->m.fd, &up->m.fd))
 				return -EFAULT;
@@ -456,6 +468,7 @@ static int put_v4l2_buffer32(struct v4l2
 	} else {
 		switch (kp->memory) {
 		case V4L2_MEMORY_MMAP:
+		case V4L2_MEMORY_OVERLAY:
 			if (put_user(kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
@@ -463,10 +476,6 @@ static int put_v4l2_buffer32(struct v4l2
 			if (put_user(kp->m.userptr, &up->m.userptr))
 				return -EFAULT;
 			break;
-		case V4L2_MEMORY_OVERLAY:
-			if (put_user(kp->m.offset, &up->m.offset))
-				return -EFAULT;
-			break;
 		case V4L2_MEMORY_DMABUF:
 			if (put_user(kp->m.fd, &up->m.fd))
 				return -EFAULT;


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

Patch "media: v4l2-compat-ioctl32.c: copy m.userptr in put_v4l2_plane32" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: copy m.userptr in put_v4l2_plane32

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:26 -0300
Subject: media: v4l2-compat-ioctl32.c: copy m.userptr in put_v4l2_plane32
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <6e6f38fc8542cf41fffcd3067026c4f015564544.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

commit 8ed5a59dcb47a6f76034ee760b36e089f3e82529 upstream.

The struct v4l2_plane32 should set m.userptr as well. The same
happens in v4l2_buffer32 and v4l2-compliance tests for this.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |   47 +++++++++++++++-----------
 1 file changed, 28 insertions(+), 19 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -287,19 +287,24 @@ static int get_v4l2_plane32(struct v4l2_
 			 sizeof(up->data_offset)))
 		return -EFAULT;
 
-	if (memory == V4L2_MEMORY_USERPTR) {
+	switch (memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
+				 sizeof(up32->m.mem_offset)))
+			return -EFAULT;
+		break;
+	case V4L2_MEMORY_USERPTR:
 		if (get_user(p, &up32->m.userptr))
 			return -EFAULT;
 		up_pln = compat_ptr(p);
 		if (put_user((unsigned long)up_pln, &up->m.userptr))
 			return -EFAULT;
-	} else if (memory == V4L2_MEMORY_DMABUF) {
+		break;
+	case V4L2_MEMORY_DMABUF:
 		if (copy_in_user(&up->m.fd, &up32->m.fd, sizeof(up32->m.fd)))
 			return -EFAULT;
-	} else {
-		if (copy_in_user(&up->m.mem_offset, &up32->m.mem_offset,
-				 sizeof(up32->m.mem_offset)))
-			return -EFAULT;
+		break;
 	}
 
 	return 0;
@@ -308,22 +313,32 @@ static int get_v4l2_plane32(struct v4l2_
 static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
 			    enum v4l2_memory memory)
 {
+	unsigned long p;
+
 	if (copy_in_user(up32, up, 2 * sizeof(__u32)) ||
 	    copy_in_user(&up32->data_offset, &up->data_offset,
 			 sizeof(up->data_offset)))
 		return -EFAULT;
 
-	/* For MMAP, driver might've set up the offset, so copy it back.
-	 * USERPTR stays the same (was userspace-provided), so no copying. */
-	if (memory == V4L2_MEMORY_MMAP)
+	switch (memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
 		if (copy_in_user(&up32->m.mem_offset, &up->m.mem_offset,
 				 sizeof(up->m.mem_offset)))
 			return -EFAULT;
-	/* For DMABUF, driver might've set up the fd, so copy it back. */
-	if (memory == V4L2_MEMORY_DMABUF)
+		break;
+	case V4L2_MEMORY_USERPTR:
+		if (get_user(p, &up->m.userptr) ||
+		    put_user((compat_ulong_t)ptr_to_compat((__force void *)p),
+			     &up32->m.userptr))
+			return -EFAULT;
+		break;
+	case V4L2_MEMORY_DMABUF:
 		if (copy_in_user(&up32->m.fd, &up->m.fd,
 				 sizeof(up->m.fd)))
 			return -EFAULT;
+		break;
+	}
 
 	return 0;
 }
@@ -383,6 +398,7 @@ static int get_v4l2_buffer32(struct v4l2
 	} else {
 		switch (kp->memory) {
 		case V4L2_MEMORY_MMAP:
+		case V4L2_MEMORY_OVERLAY:
 			if (get_user(kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
@@ -396,10 +412,6 @@ static int get_v4l2_buffer32(struct v4l2
 				kp->m.userptr = (unsigned long)compat_ptr(tmp);
 			}
 			break;
-		case V4L2_MEMORY_OVERLAY:
-			if (get_user(kp->m.offset, &up->m.offset))
-				return -EFAULT;
-			break;
 		case V4L2_MEMORY_DMABUF:
 			if (get_user(kp->m.fd, &up->m.fd))
 				return -EFAULT;
@@ -456,6 +468,7 @@ static int put_v4l2_buffer32(struct v4l2
 	} else {
 		switch (kp->memory) {
 		case V4L2_MEMORY_MMAP:
+		case V4L2_MEMORY_OVERLAY:
 			if (put_user(kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
@@ -463,10 +476,6 @@ static int put_v4l2_buffer32(struct v4l2
 			if (put_user(kp->m.userptr, &up->m.userptr))
 				return -EFAULT;
 			break;
-		case V4L2_MEMORY_OVERLAY:
-			if (put_user(kp->m.offset, &up->m.offset))
-				return -EFAULT;
-			break;
 		case V4L2_MEMORY_DMABUF:
 			if (put_user(kp->m.fd, &up->m.fd))
 				return -EFAULT;


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 08/18] media: v4l2-compat-ioctl32.c: fix ctrl_is_pointer

[Mauro Carvalho Chehab]

From: Hans Verkuil <hans.verkuil@cisco.com>

commit b8c601e8af2d08f733d74defa8465303391bb930 upstream.

ctrl_is_pointer just hardcoded two known string controls, but that
caused problems when using e.g. custom controls that use a pointer
for the payload.

Reimplement this function: it now finds the v4l2_ctrl (if the driver
uses the control framework) or it calls vidioc_query_ext_ctrl (if the
driver implements that directly).

In both cases it can now check if the control is a pointer control
or not.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 57 ++++++++++++++++++---------
 1 file changed, 38 insertions(+), 19 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index a27fd9105948..c78462e79a0a 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -18,6 +18,8 @@
 #include <linux/videodev2.h>
 #include <linux/v4l2-subdev.h>
 #include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ctrls.h>
 #include <media/v4l2-ioctl.h>
 
 static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
@@ -575,24 +577,39 @@ struct v4l2_ext_control32 {
 	};
 } __attribute__ ((packed));
 
-/* The following function really belong in v4l2-common, but that causes
-   a circular dependency between modules. We need to think about this, but
-   for now this will do. */
-
-/* Return non-zero if this control is a pointer type. Currently only
-   type STRING is a pointer type. */
-static inline int ctrl_is_pointer(u32 id)
+/* Return true if this control is a pointer type. */
+static inline bool ctrl_is_pointer(struct file *file, u32 id)
 {
-	switch (id) {
-	case V4L2_CID_RDS_TX_PS_NAME:
-	case V4L2_CID_RDS_TX_RADIO_TEXT:
-		return 1;
-	default:
-		return 0;
+	struct video_device *vdev = video_devdata(file);
+	struct v4l2_fh *fh = NULL;
+	struct v4l2_ctrl_handler *hdl = NULL;
+	struct v4l2_query_ext_ctrl qec = { id };
+	const struct v4l2_ioctl_ops *ops = vdev->ioctl_ops;
+
+	if (test_bit(V4L2_FL_USES_V4L2_FH, &vdev->flags))
+		fh = file->private_data;
+
+	if (fh && fh->ctrl_handler)
+		hdl = fh->ctrl_handler;
+	else if (vdev->ctrl_handler)
+		hdl = vdev->ctrl_handler;
+
+	if (hdl) {
+		struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, id);
+
+		return ctrl && ctrl->is_ptr;
 	}
+
+	if (!ops->vidioc_query_ext_ctrl)
+		return false;
+
+	return !ops->vidioc_query_ext_ctrl(file, fh, &qec) &&
+		(qec.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD);
 }
 
-static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
+static int get_v4l2_ext_controls32(struct file *file,
+				   struct v4l2_ext_controls *kp,
+				   struct v4l2_ext_controls32 __user *up)
 {
 	struct v4l2_ext_control32 __user *ucontrols;
 	struct v4l2_ext_control __user *kcontrols;
@@ -624,7 +641,7 @@ static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
 			return -EFAULT;
 		if (get_user(id, &kcontrols->id))
 			return -EFAULT;
-		if (ctrl_is_pointer(id)) {
+		if (ctrl_is_pointer(file, id)) {
 			void __user *s;
 
 			if (get_user(p, &ucontrols->string))
@@ -639,7 +656,9 @@ static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
 	return 0;
 }
 
-static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
+static int put_v4l2_ext_controls32(struct file *file,
+				   struct v4l2_ext_controls *kp,
+				   struct v4l2_ext_controls32 __user *up)
 {
 	struct v4l2_ext_control32 __user *ucontrols;
 	struct v4l2_ext_control __user *kcontrols =
@@ -671,7 +690,7 @@ static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext
 		/* Do not modify the pointer when copying a pointer control.
 		   The contents of the pointer was changed, not the pointer
 		   itself. */
-		if (ctrl_is_pointer(id))
+		if (ctrl_is_pointer(file, id))
 			size -= sizeof(ucontrols->value64);
 		if (copy_in_user(ucontrols, kcontrols, size))
 			return -EFAULT;
@@ -884,7 +903,7 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 	case VIDIOC_G_EXT_CTRLS:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_TRY_EXT_CTRLS:
-		err = get_v4l2_ext_controls32(&karg.v2ecs, up);
+		err = get_v4l2_ext_controls32(file, &karg.v2ecs, up);
 		compatible_arg = 0;
 		break;
 	case VIDIOC_DQEVENT:
@@ -911,7 +930,7 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 	case VIDIOC_G_EXT_CTRLS:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_TRY_EXT_CTRLS:
-		if (put_v4l2_ext_controls32(&karg.v2ecs, up))
+		if (put_v4l2_ext_controls32(file, &karg.v2ecs, up))
 			err = -EFAULT;
 		break;
 	}
-- 
2.14.3

Patch "media: v4l2-compat-ioctl32.c: fix ctrl_is_pointer" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: fix ctrl_is_pointer

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:27 -0300
Subject: media: v4l2-compat-ioctl32.c: fix ctrl_is_pointer
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <63df92f6981785c5e31c1d8e796e827344cc75f3.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

commit b8c601e8af2d08f733d74defa8465303391bb930 upstream.

ctrl_is_pointer just hardcoded two known string controls, but that
caused problems when using e.g. custom controls that use a pointer
for the payload.

Reimplement this function: it now finds the v4l2_ctrl (if the driver
uses the control framework) or it calls vidioc_query_ext_ctrl (if the
driver implements that directly).

In both cases it can now check if the control is a pointer control
or not.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |   59 +++++++++++++++++---------
 1 file changed, 39 insertions(+), 20 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -18,6 +18,8 @@
 #include <linux/videodev2.h>
 #include <linux/v4l2-subdev.h>
 #include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ctrls.h>
 #include <media/v4l2-ioctl.h>
 
 static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
@@ -575,24 +577,39 @@ struct v4l2_ext_control32 {
 	};
 } __attribute__ ((packed));
 
-/* The following function really belong in v4l2-common, but that causes
-   a circular dependency between modules. We need to think about this, but
-   for now this will do. */
-
-/* Return non-zero if this control is a pointer type. Currently only
-   type STRING is a pointer type. */
-static inline int ctrl_is_pointer(u32 id)
-{
-	switch (id) {
-	case V4L2_CID_RDS_TX_PS_NAME:
-	case V4L2_CID_RDS_TX_RADIO_TEXT:
-		return 1;
-	default:
-		return 0;
+/* Return true if this control is a pointer type. */
+static inline bool ctrl_is_pointer(struct file *file, u32 id)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct v4l2_fh *fh = NULL;
+	struct v4l2_ctrl_handler *hdl = NULL;
+	struct v4l2_query_ext_ctrl qec = { id };
+	const struct v4l2_ioctl_ops *ops = vdev->ioctl_ops;
+
+	if (test_bit(V4L2_FL_USES_V4L2_FH, &vdev->flags))
+		fh = file->private_data;
+
+	if (fh && fh->ctrl_handler)
+		hdl = fh->ctrl_handler;
+	else if (vdev->ctrl_handler)
+		hdl = vdev->ctrl_handler;
+
+	if (hdl) {
+		struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, id);
+
+		return ctrl && ctrl->is_ptr;
 	}
+
+	if (!ops->vidioc_query_ext_ctrl)
+		return false;
+
+	return !ops->vidioc_query_ext_ctrl(file, fh, &qec) &&
+		(qec.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD);
 }
 
-static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
+static int get_v4l2_ext_controls32(struct file *file,
+				   struct v4l2_ext_controls *kp,
+				   struct v4l2_ext_controls32 __user *up)
 {
 	struct v4l2_ext_control32 __user *ucontrols;
 	struct v4l2_ext_control __user *kcontrols;
@@ -624,7 +641,7 @@ static int get_v4l2_ext_controls32(struc
 			return -EFAULT;
 		if (get_user(id, &kcontrols->id))
 			return -EFAULT;
-		if (ctrl_is_pointer(id)) {
+		if (ctrl_is_pointer(file, id)) {
 			void __user *s;
 
 			if (get_user(p, &ucontrols->string))
@@ -639,7 +656,9 @@ static int get_v4l2_ext_controls32(struc
 	return 0;
 }
 
-static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
+static int put_v4l2_ext_controls32(struct file *file,
+				   struct v4l2_ext_controls *kp,
+				   struct v4l2_ext_controls32 __user *up)
 {
 	struct v4l2_ext_control32 __user *ucontrols;
 	struct v4l2_ext_control __user *kcontrols =
@@ -671,7 +690,7 @@ static int put_v4l2_ext_controls32(struc
 		/* Do not modify the pointer when copying a pointer control.
 		   The contents of the pointer was changed, not the pointer
 		   itself. */
-		if (ctrl_is_pointer(id))
+		if (ctrl_is_pointer(file, id))
 			size -= sizeof(ucontrols->value64);
 		if (copy_in_user(ucontrols, kcontrols, size))
 			return -EFAULT;
@@ -884,7 +903,7 @@ static long do_video_ioctl(struct file *
 	case VIDIOC_G_EXT_CTRLS:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_TRY_EXT_CTRLS:
-		err = get_v4l2_ext_controls32(&karg.v2ecs, up);
+		err = get_v4l2_ext_controls32(file, &karg.v2ecs, up);
 		compatible_arg = 0;
 		break;
 	case VIDIOC_DQEVENT:
@@ -911,7 +930,7 @@ static long do_video_ioctl(struct file *
 	case VIDIOC_G_EXT_CTRLS:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_TRY_EXT_CTRLS:
-		if (put_v4l2_ext_controls32(&karg.v2ecs, up))
+		if (put_v4l2_ext_controls32(file, &karg.v2ecs, up))
 			err = -EFAULT;
 		break;
 	}


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

Patch "media: v4l2-compat-ioctl32.c: fix ctrl_is_pointer" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: fix ctrl_is_pointer

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:27 -0300
Subject: media: v4l2-compat-ioctl32.c: fix ctrl_is_pointer
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <63df92f6981785c5e31c1d8e796e827344cc75f3.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

commit b8c601e8af2d08f733d74defa8465303391bb930 upstream.

ctrl_is_pointer just hardcoded two known string controls, but that
caused problems when using e.g. custom controls that use a pointer
for the payload.

Reimplement this function: it now finds the v4l2_ctrl (if the driver
uses the control framework) or it calls vidioc_query_ext_ctrl (if the
driver implements that directly).

In both cases it can now check if the control is a pointer control
or not.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |   59 +++++++++++++++++---------
 1 file changed, 39 insertions(+), 20 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -18,6 +18,8 @@
 #include <linux/videodev2.h>
 #include <linux/v4l2-subdev.h>
 #include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ctrls.h>
 #include <media/v4l2-ioctl.h>
 
 static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
@@ -575,24 +577,39 @@ struct v4l2_ext_control32 {
 	};
 } __attribute__ ((packed));
 
-/* The following function really belong in v4l2-common, but that causes
-   a circular dependency between modules. We need to think about this, but
-   for now this will do. */
-
-/* Return non-zero if this control is a pointer type. Currently only
-   type STRING is a pointer type. */
-static inline int ctrl_is_pointer(u32 id)
-{
-	switch (id) {
-	case V4L2_CID_RDS_TX_PS_NAME:
-	case V4L2_CID_RDS_TX_RADIO_TEXT:
-		return 1;
-	default:
-		return 0;
+/* Return true if this control is a pointer type. */
+static inline bool ctrl_is_pointer(struct file *file, u32 id)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct v4l2_fh *fh = NULL;
+	struct v4l2_ctrl_handler *hdl = NULL;
+	struct v4l2_query_ext_ctrl qec = { id };
+	const struct v4l2_ioctl_ops *ops = vdev->ioctl_ops;
+
+	if (test_bit(V4L2_FL_USES_V4L2_FH, &vdev->flags))
+		fh = file->private_data;
+
+	if (fh && fh->ctrl_handler)
+		hdl = fh->ctrl_handler;
+	else if (vdev->ctrl_handler)
+		hdl = vdev->ctrl_handler;
+
+	if (hdl) {
+		struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, id);
+
+		return ctrl && ctrl->is_ptr;
 	}
+
+	if (!ops->vidioc_query_ext_ctrl)
+		return false;
+
+	return !ops->vidioc_query_ext_ctrl(file, fh, &qec) &&
+		(qec.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD);
 }
 
-static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
+static int get_v4l2_ext_controls32(struct file *file,
+				   struct v4l2_ext_controls *kp,
+				   struct v4l2_ext_controls32 __user *up)
 {
 	struct v4l2_ext_control32 __user *ucontrols;
 	struct v4l2_ext_control __user *kcontrols;
@@ -624,7 +641,7 @@ static int get_v4l2_ext_controls32(struc
 			return -EFAULT;
 		if (get_user(id, &kcontrols->id))
 			return -EFAULT;
-		if (ctrl_is_pointer(id)) {
+		if (ctrl_is_pointer(file, id)) {
 			void __user *s;
 
 			if (get_user(p, &ucontrols->string))
@@ -639,7 +656,9 @@ static int get_v4l2_ext_controls32(struc
 	return 0;
 }
 
-static int put_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
+static int put_v4l2_ext_controls32(struct file *file,
+				   struct v4l2_ext_controls *kp,
+				   struct v4l2_ext_controls32 __user *up)
 {
 	struct v4l2_ext_control32 __user *ucontrols;
 	struct v4l2_ext_control __user *kcontrols =
@@ -671,7 +690,7 @@ static int put_v4l2_ext_controls32(struc
 		/* Do not modify the pointer when copying a pointer control.
 		   The contents of the pointer was changed, not the pointer
 		   itself. */
-		if (ctrl_is_pointer(id))
+		if (ctrl_is_pointer(file, id))
 			size -= sizeof(ucontrols->value64);
 		if (copy_in_user(ucontrols, kcontrols, size))
 			return -EFAULT;
@@ -884,7 +903,7 @@ static long do_video_ioctl(struct file *
 	case VIDIOC_G_EXT_CTRLS:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_TRY_EXT_CTRLS:
-		err = get_v4l2_ext_controls32(&karg.v2ecs, up);
+		err = get_v4l2_ext_controls32(file, &karg.v2ecs, up);
 		compatible_arg = 0;
 		break;
 	case VIDIOC_DQEVENT:
@@ -911,7 +930,7 @@ static long do_video_ioctl(struct file *
 	case VIDIOC_G_EXT_CTRLS:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_TRY_EXT_CTRLS:
-		if (put_v4l2_ext_controls32(&karg.v2ecs, up))
+		if (put_v4l2_ext_controls32(file, &karg.v2ecs, up))
 			err = -EFAULT;
 		break;
 	}


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 09/18] media: v4l2-compat-ioctl32.c: make ctrl_is_pointer work for subdevs

[Mauro Carvalho Chehab]

From: Hans Verkuil <hansverk@cisco.com>

commit 273caa260035c03d89ad63d72d8cd3d9e5c5e3f1 upstream.

If the device is of type VFL_TYPE_SUBDEV then vdev->ioctl_ops
is NULL so the 'if (!ops->vidioc_query_ext_ctrl)' check would crash.
Add a test for !ops to the condition.

All sub-devices that have controls will use the control framework,
so they do not have an equivalent to ops->vidioc_query_ext_ctrl.
Returning false if ops is NULL is the correct thing to do here.

Fixes: b8c601e8af ("v4l2-compat-ioctl32.c: fix ctrl_is_pointer")

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index c78462e79a0a..bd4890769e0b 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -600,7 +600,7 @@ static inline bool ctrl_is_pointer(struct file *file, u32 id)
 		return ctrl && ctrl->is_ptr;
 	}
 
-	if (!ops->vidioc_query_ext_ctrl)
+	if (!ops || !ops->vidioc_query_ext_ctrl)
 		return false;
 
 	return !ops->vidioc_query_ext_ctrl(file, fh, &qec) &&
-- 
2.14.3

Patch "media: v4l2-compat-ioctl32.c: make ctrl_is_pointer work for subdevs" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: make ctrl_is_pointer work for subdevs

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:28 -0300
Subject: media: v4l2-compat-ioctl32.c: make ctrl_is_pointer work for subdevs
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hansverk@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <39d6997be9988f81bce42a00115b062aac7b0a51.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hansverk@cisco.com>

commit 273caa260035c03d89ad63d72d8cd3d9e5c5e3f1 upstream.

If the device is of type VFL_TYPE_SUBDEV then vdev->ioctl_ops
is NULL so the 'if (!ops->vidioc_query_ext_ctrl)' check would crash.
Add a test for !ops to the condition.

All sub-devices that have controls will use the control framework,
so they do not have an equivalent to ops->vidioc_query_ext_ctrl.
Returning false if ops is NULL is the correct thing to do here.

Fixes: b8c601e8af ("v4l2-compat-ioctl32.c: fix ctrl_is_pointer")

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -600,7 +600,7 @@ static inline bool ctrl_is_pointer(struc
 		return ctrl && ctrl->is_ptr;
 	}
 
-	if (!ops->vidioc_query_ext_ctrl)
+	if (!ops || !ops->vidioc_query_ext_ctrl)
 		return false;
 
 	return !ops->vidioc_query_ext_ctrl(file, fh, &qec) &&


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

Patch "media: v4l2-compat-ioctl32.c: make ctrl_is_pointer work for subdevs" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: make ctrl_is_pointer work for subdevs

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:28 -0300
Subject: media: v4l2-compat-ioctl32.c: make ctrl_is_pointer work for subdevs
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hansverk@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <39d6997be9988f81bce42a00115b062aac7b0a51.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hansverk@cisco.com>

commit 273caa260035c03d89ad63d72d8cd3d9e5c5e3f1 upstream.

If the device is of type VFL_TYPE_SUBDEV then vdev->ioctl_ops
is NULL so the 'if (!ops->vidioc_query_ext_ctrl)' check would crash.
Add a test for !ops to the condition.

All sub-devices that have controls will use the control framework,
so they do not have an equivalent to ops->vidioc_query_ext_ctrl.
Returning false if ops is NULL is the correct thing to do here.

Fixes: b8c601e8af ("v4l2-compat-ioctl32.c: fix ctrl_is_pointer")

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -600,7 +600,7 @@ static inline bool ctrl_is_pointer(struc
 		return ctrl && ctrl->is_ptr;
 	}
 
-	if (!ops->vidioc_query_ext_ctrl)
+	if (!ops || !ops->vidioc_query_ext_ctrl)
 		return false;
 
 	return !ops->vidioc_query_ext_ctrl(file, fh, &qec) &&


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 10/18] media: v4l2-compat-ioctl32: Copy v4l2_window->global_alpha

[Mauro Carvalho Chehab]

From: Daniel Mentz <danielmentz@google.com>

commit 025a26fa14f8fd55d50ab284a30c016a5be953d0 upstream.

Commit b2787845fb91 ("V4L/DVB (5289): Add support for video output
overlays.") added the field global_alpha to struct v4l2_window but did
not update the compat layer accordingly. This change adds global_alpha
to struct v4l2_window32 and copies the value for global_alpha back and
forth.

Signed-off-by: Daniel Mentz <danielmentz@google.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index bd4890769e0b..fd32c9ccc2bb 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -45,6 +45,7 @@ struct v4l2_window32 {
 	compat_caddr_t		clips; /* actually struct v4l2_clip32 * */
 	__u32			clipcount;
 	compat_caddr_t		bitmap;
+	__u8                    global_alpha;
 };
 
 static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
@@ -53,7 +54,8 @@ static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user
 	    copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
 	    get_user(kp->field, &up->field) ||
 	    get_user(kp->chromakey, &up->chromakey) ||
-	    get_user(kp->clipcount, &up->clipcount))
+	    get_user(kp->clipcount, &up->clipcount) ||
+	    get_user(kp->global_alpha, &up->global_alpha))
 		return -EFAULT;
 	if (kp->clipcount > 2048)
 		return -EINVAL;
@@ -86,7 +88,8 @@ static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user
 	if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
 	    put_user(kp->field, &up->field) ||
 	    put_user(kp->chromakey, &up->chromakey) ||
-	    put_user(kp->clipcount, &up->clipcount))
+	    put_user(kp->clipcount, &up->clipcount) ||
+	    put_user(kp->global_alpha, &up->global_alpha))
 		return -EFAULT;
 	return 0;
 }
-- 
2.14.3

Patch "media: v4l2-compat-ioctl32: Copy v4l2_window->global_alpha" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32: Copy v4l2_window->global_alpha

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:29 -0300
Subject: media: v4l2-compat-ioctl32: Copy v4l2_window->global_alpha
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Daniel Mentz <danielmentz@google.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <63c220c11ade842157669d03bdaf10b84a6d91a9.1522260310.git.mchehab@s-opensource.com>

From: Daniel Mentz <danielmentz@google.com>

commit 025a26fa14f8fd55d50ab284a30c016a5be953d0 upstream.

Commit b2787845fb91 ("V4L/DVB (5289): Add support for video output
overlays.") added the field global_alpha to struct v4l2_window but did
not update the compat layer accordingly. This change adds global_alpha
to struct v4l2_window32 and copies the value for global_alpha back and
forth.

Signed-off-by: Daniel Mentz <danielmentz@google.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -45,6 +45,7 @@ struct v4l2_window32 {
 	compat_caddr_t		clips; /* actually struct v4l2_clip32 * */
 	__u32			clipcount;
 	compat_caddr_t		bitmap;
+	__u8                    global_alpha;
 };
 
 static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
@@ -53,7 +54,8 @@ static int get_v4l2_window32(struct v4l2
 	    copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
 	    get_user(kp->field, &up->field) ||
 	    get_user(kp->chromakey, &up->chromakey) ||
-	    get_user(kp->clipcount, &up->clipcount))
+	    get_user(kp->clipcount, &up->clipcount) ||
+	    get_user(kp->global_alpha, &up->global_alpha))
 		return -EFAULT;
 	if (kp->clipcount > 2048)
 		return -EINVAL;
@@ -86,7 +88,8 @@ static int put_v4l2_window32(struct v4l2
 	if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
 	    put_user(kp->field, &up->field) ||
 	    put_user(kp->chromakey, &up->chromakey) ||
-	    put_user(kp->clipcount, &up->clipcount))
+	    put_user(kp->clipcount, &up->clipcount) ||
+	    put_user(kp->global_alpha, &up->global_alpha))
 		return -EFAULT;
 	return 0;
 }


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

Patch "media: v4l2-compat-ioctl32: Copy v4l2_window->global_alpha" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32: Copy v4l2_window->global_alpha

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:29 -0300
Subject: media: v4l2-compat-ioctl32: Copy v4l2_window->global_alpha
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Daniel Mentz <danielmentz@google.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <63c220c11ade842157669d03bdaf10b84a6d91a9.1522260310.git.mchehab@s-opensource.com>

From: Daniel Mentz <danielmentz@google.com>

commit 025a26fa14f8fd55d50ab284a30c016a5be953d0 upstream.

Commit b2787845fb91 ("V4L/DVB (5289): Add support for video output
overlays.") added the field global_alpha to struct v4l2_window but did
not update the compat layer accordingly. This change adds global_alpha
to struct v4l2_window32 and copies the value for global_alpha back and
forth.

Signed-off-by: Daniel Mentz <danielmentz@google.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -45,6 +45,7 @@ struct v4l2_window32 {
 	compat_caddr_t		clips; /* actually struct v4l2_clip32 * */
 	__u32			clipcount;
 	compat_caddr_t		bitmap;
+	__u8                    global_alpha;
 };
 
 static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
@@ -53,7 +54,8 @@ static int get_v4l2_window32(struct v4l2
 	    copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
 	    get_user(kp->field, &up->field) ||
 	    get_user(kp->chromakey, &up->chromakey) ||
-	    get_user(kp->clipcount, &up->clipcount))
+	    get_user(kp->clipcount, &up->clipcount) ||
+	    get_user(kp->global_alpha, &up->global_alpha))
 		return -EFAULT;
 	if (kp->clipcount > 2048)
 		return -EINVAL;
@@ -86,7 +88,8 @@ static int put_v4l2_window32(struct v4l2
 	if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
 	    put_user(kp->field, &up->field) ||
 	    put_user(kp->chromakey, &up->chromakey) ||
-	    put_user(kp->clipcount, &up->clipcount))
+	    put_user(kp->clipcount, &up->clipcount) ||
+	    put_user(kp->global_alpha, &up->global_alpha))
 		return -EFAULT;
 	return 0;
 }


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 11/18] media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32

[Mauro Carvalho Chehab]

From: Hans Verkuil <hans.verkuil@cisco.com>

commit a751be5b142ef6bcbbb96d9899516f4d9c8d0ef4 upstream.

put_v4l2_window32() didn't copy back the clip list to userspace.
Drivers can update the clip rectangles, so this should be done.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 61 ++++++++++++++++++---------
 1 file changed, 41 insertions(+), 20 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index fd32c9ccc2bb..8a5c93ce4348 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -50,6 +50,11 @@ struct v4l2_window32 {
 
 static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
 {
+	struct v4l2_clip32 __user *uclips;
+	struct v4l2_clip __user *kclips;
+	compat_caddr_t p;
+	u32 n;
+
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
 	    get_user(kp->field, &up->field) ||
@@ -59,38 +64,54 @@ static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user
 		return -EFAULT;
 	if (kp->clipcount > 2048)
 		return -EINVAL;
-	if (kp->clipcount) {
-		struct v4l2_clip32 __user *uclips;
-		struct v4l2_clip __user *kclips;
-		int n = kp->clipcount;
-		compat_caddr_t p;
-
-		if (get_user(p, &up->clips))
-			return -EFAULT;
-		uclips = compat_ptr(p);
-		kclips = compat_alloc_user_space(n * sizeof(*kclips));
-		kp->clips = kclips;
-		while (--n >= 0) {
-			if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
-				return -EFAULT;
-			if (put_user(n ? kclips + 1 : NULL, &kclips->next))
-				return -EFAULT;
-			uclips += 1;
-			kclips += 1;
-		}
-	} else
+	if (!kp->clipcount) {
 		kp->clips = NULL;
+		return 0;
+	}
+
+	n = kp->clipcount;
+	if (get_user(p, &up->clips))
+		return -EFAULT;
+	uclips = compat_ptr(p);
+	kclips = compat_alloc_user_space(n * sizeof(*kclips));
+	kp->clips = kclips;
+	while (n--) {
+		if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
+			return -EFAULT;
+		if (put_user(n ? kclips + 1 : NULL, &kclips->next))
+			return -EFAULT;
+		uclips++;
+		kclips++;
+	}
 	return 0;
 }
 
 static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
 {
+	struct v4l2_clip __user *kclips = kp->clips;
+	struct v4l2_clip32 __user *uclips;
+	u32 n = kp->clipcount;
+	compat_caddr_t p;
+
 	if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
 	    put_user(kp->field, &up->field) ||
 	    put_user(kp->chromakey, &up->chromakey) ||
 	    put_user(kp->clipcount, &up->clipcount) ||
 	    put_user(kp->global_alpha, &up->global_alpha))
 		return -EFAULT;
+
+	if (!kp->clipcount)
+		return 0;
+
+	if (get_user(p, &up->clips))
+		return -EFAULT;
+	uclips = compat_ptr(p);
+	while (n--) {
+		if (copy_in_user(&uclips->c, &kclips->c, sizeof(uclips->c)))
+			return -EFAULT;
+		uclips++;
+		kclips++;
+	}
 	return 0;
 }
 
-- 
2.14.3

Patch "media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:30 -0300
Subject: media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <b203ca17a23bf02398ef39e8f123d30b74df3523.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

commit a751be5b142ef6bcbbb96d9899516f4d9c8d0ef4 upstream.

put_v4l2_window32() didn't copy back the clip list to userspace.
Drivers can update the clip rectangles, so this should be done.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |   59 +++++++++++++++++---------
 1 file changed, 40 insertions(+), 19 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -50,6 +50,11 @@ struct v4l2_window32 {
 
 static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
 {
+	struct v4l2_clip32 __user *uclips;
+	struct v4l2_clip __user *kclips;
+	compat_caddr_t p;
+	u32 n;
+
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
 	    get_user(kp->field, &up->field) ||
@@ -59,38 +64,54 @@ static int get_v4l2_window32(struct v4l2
 		return -EFAULT;
 	if (kp->clipcount > 2048)
 		return -EINVAL;
-	if (kp->clipcount) {
-		struct v4l2_clip32 __user *uclips;
-		struct v4l2_clip __user *kclips;
-		int n = kp->clipcount;
-		compat_caddr_t p;
+	if (!kp->clipcount) {
+		kp->clips = NULL;
+		return 0;
+	}
 
-		if (get_user(p, &up->clips))
+	n = kp->clipcount;
+	if (get_user(p, &up->clips))
+		return -EFAULT;
+	uclips = compat_ptr(p);
+	kclips = compat_alloc_user_space(n * sizeof(*kclips));
+	kp->clips = kclips;
+	while (n--) {
+		if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
 			return -EFAULT;
-		uclips = compat_ptr(p);
-		kclips = compat_alloc_user_space(n * sizeof(*kclips));
-		kp->clips = kclips;
-		while (--n >= 0) {
-			if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
-				return -EFAULT;
-			if (put_user(n ? kclips + 1 : NULL, &kclips->next))
-				return -EFAULT;
-			uclips += 1;
-			kclips += 1;
-		}
-	} else
-		kp->clips = NULL;
+		if (put_user(n ? kclips + 1 : NULL, &kclips->next))
+			return -EFAULT;
+		uclips++;
+		kclips++;
+	}
 	return 0;
 }
 
 static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
 {
+	struct v4l2_clip __user *kclips = kp->clips;
+	struct v4l2_clip32 __user *uclips;
+	u32 n = kp->clipcount;
+	compat_caddr_t p;
+
 	if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
 	    put_user(kp->field, &up->field) ||
 	    put_user(kp->chromakey, &up->chromakey) ||
 	    put_user(kp->clipcount, &up->clipcount) ||
 	    put_user(kp->global_alpha, &up->global_alpha))
 		return -EFAULT;
+
+	if (!kp->clipcount)
+		return 0;
+
+	if (get_user(p, &up->clips))
+		return -EFAULT;
+	uclips = compat_ptr(p);
+	while (n--) {
+		if (copy_in_user(&uclips->c, &kclips->c, sizeof(uclips->c)))
+			return -EFAULT;
+		uclips++;
+		kclips++;
+	}
 	return 0;
 }
 


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

Patch "media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:30 -0300
Subject: media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <b203ca17a23bf02398ef39e8f123d30b74df3523.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

commit a751be5b142ef6bcbbb96d9899516f4d9c8d0ef4 upstream.

put_v4l2_window32() didn't copy back the clip list to userspace.
Drivers can update the clip rectangles, so this should be done.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |   59 +++++++++++++++++---------
 1 file changed, 40 insertions(+), 19 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -50,6 +50,11 @@ struct v4l2_window32 {
 
 static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
 {
+	struct v4l2_clip32 __user *uclips;
+	struct v4l2_clip __user *kclips;
+	compat_caddr_t p;
+	u32 n;
+
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
 	    get_user(kp->field, &up->field) ||
@@ -59,38 +64,54 @@ static int get_v4l2_window32(struct v4l2
 		return -EFAULT;
 	if (kp->clipcount > 2048)
 		return -EINVAL;
-	if (kp->clipcount) {
-		struct v4l2_clip32 __user *uclips;
-		struct v4l2_clip __user *kclips;
-		int n = kp->clipcount;
-		compat_caddr_t p;
+	if (!kp->clipcount) {
+		kp->clips = NULL;
+		return 0;
+	}
 
-		if (get_user(p, &up->clips))
+	n = kp->clipcount;
+	if (get_user(p, &up->clips))
+		return -EFAULT;
+	uclips = compat_ptr(p);
+	kclips = compat_alloc_user_space(n * sizeof(*kclips));
+	kp->clips = kclips;
+	while (n--) {
+		if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
 			return -EFAULT;
-		uclips = compat_ptr(p);
-		kclips = compat_alloc_user_space(n * sizeof(*kclips));
-		kp->clips = kclips;
-		while (--n >= 0) {
-			if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
-				return -EFAULT;
-			if (put_user(n ? kclips + 1 : NULL, &kclips->next))
-				return -EFAULT;
-			uclips += 1;
-			kclips += 1;
-		}
-	} else
-		kp->clips = NULL;
+		if (put_user(n ? kclips + 1 : NULL, &kclips->next))
+			return -EFAULT;
+		uclips++;
+		kclips++;
+	}
 	return 0;
 }
 
 static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
 {
+	struct v4l2_clip __user *kclips = kp->clips;
+	struct v4l2_clip32 __user *uclips;
+	u32 n = kp->clipcount;
+	compat_caddr_t p;
+
 	if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
 	    put_user(kp->field, &up->field) ||
 	    put_user(kp->chromakey, &up->chromakey) ||
 	    put_user(kp->clipcount, &up->clipcount) ||
 	    put_user(kp->global_alpha, &up->global_alpha))
 		return -EFAULT;
+
+	if (!kp->clipcount)
+		return 0;
+
+	if (get_user(p, &up->clips))
+		return -EFAULT;
+	uclips = compat_ptr(p);
+	while (n--) {
+		if (copy_in_user(&uclips->c, &kclips->c, sizeof(uclips->c)))
+			return -EFAULT;
+		uclips++;
+		kclips++;
+	}
 	return 0;
 }
 


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 12/18] media: v4l2-compat-ioctl32.c: drop pr_info for unknown buffer type

[Mauro Carvalho Chehab]

From: Hans Verkuil <hans.verkuil@cisco.com>

commit 169f24ca68bf0f247d111aef07af00dd3a02ae88 upstream.

There is nothing wrong with using an unknown buffer type. So
stop spamming the kernel log whenever this happens. The kernel
will just return -EINVAL to signal this.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index 8a5c93ce4348..a5f74a508f58 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -170,8 +170,6 @@ static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __us
 		return copy_from_user(&kp->fmt.sliced, &up->fmt.sliced,
 				      sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 	default:
-		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
-		       kp->type);
 		return -EINVAL;
 	}
 }
@@ -214,8 +212,6 @@ static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __us
 		return copy_to_user(&up->fmt.sliced, &kp->fmt.sliced,
 				    sizeof(kp->fmt.sliced)) ?  -EFAULT : 0;
 	default:
-		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
-		       kp->type);
 		return -EINVAL;
 	}
 }
-- 
2.14.3

Patch "media: v4l2-compat-ioctl32.c: drop pr_info for unknown buffer type" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: drop pr_info for unknown buffer type

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:31 -0300
Subject: media: v4l2-compat-ioctl32.c: drop pr_info for unknown buffer type
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <8f000de7f9babd3f104eacbd7e79fbd72372c9d1.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

commit 169f24ca68bf0f247d111aef07af00dd3a02ae88 upstream.

There is nothing wrong with using an unknown buffer type. So
stop spamming the kernel log whenever this happens. The kernel
will just return -EINVAL to signal this.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |    4 ----
 1 file changed, 4 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -170,8 +170,6 @@ static int __get_v4l2_format32(struct v4
 		return copy_from_user(&kp->fmt.sliced, &up->fmt.sliced,
 				      sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 	default:
-		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
-		       kp->type);
 		return -EINVAL;
 	}
 }
@@ -214,8 +212,6 @@ static int __put_v4l2_format32(struct v4
 		return copy_to_user(&up->fmt.sliced, &kp->fmt.sliced,
 				    sizeof(kp->fmt.sliced)) ?  -EFAULT : 0;
 	default:
-		printk(KERN_INFO "compat_ioctl32: unexpected VIDIOC_FMT type %d\n",
-		       kp->type);
 		return -EINVAL;
 	}
 }


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 13/18] media: v4l2-compat-ioctl32.c: don't copy back the result for certain errors

[Mauro Carvalho Chehab]

From: Hans Verkuil <hans.verkuil@cisco.com>

commit d83a8243aaefe62ace433e4384a4f077bed86acb upstream.

Some ioctls need to copy back the result even if the ioctl returned
an error. However, don't do this for the error code -ENOTTY.
It makes no sense in that cases.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index a5f74a508f58..9e5807842dad 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -943,6 +943,9 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 		set_fs(old_fs);
 	}
 
+	if (err == -ENOTTY)
+		return err;
+
 	/* Special case: even after an error we need to put the
 	   results back for these ioctls since the error_idx will
 	   contain information on which control failed. */
-- 
2.14.3

Patch "media: v4l2-compat-ioctl32.c: don't copy back the result for certain errors" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: don't copy back the result for certain errors

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:32 -0300
Subject: media: v4l2-compat-ioctl32.c: don't copy back the result for certain errors
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <9d0bb62c2dc7caee1fd2b9199fc1a22ec8479395.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

commit d83a8243aaefe62ace433e4384a4f077bed86acb upstream.

Some ioctls need to copy back the result even if the ioctl returned
an error. However, don't do this for the error code -ENOTTY.
It makes no sense in that cases.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -943,6 +943,9 @@ static long do_video_ioctl(struct file *
 		set_fs(old_fs);
 	}
 
+	if (err == -ENOTTY)
+		return err;
+
 	/* Special case: even after an error we need to put the
 	   results back for these ioctls since the error_idx will
 	   contain information on which control failed. */


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

Patch "media: v4l2-compat-ioctl32.c: don't copy back the result for certain errors" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: don't copy back the result for certain errors

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:32 -0300
Subject: media: v4l2-compat-ioctl32.c: don't copy back the result for certain errors
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <9d0bb62c2dc7caee1fd2b9199fc1a22ec8479395.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

commit d83a8243aaefe62ace433e4384a4f077bed86acb upstream.

Some ioctls need to copy back the result even if the ioctl returned
an error. However, don't do this for the error code -ENOTTY.
It makes no sense in that cases.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -943,6 +943,9 @@ static long do_video_ioctl(struct file *
 		set_fs(old_fs);
 	}
 
+	if (err == -ENOTTY)
+		return err;
+
 	/* Special case: even after an error we need to put the
 	   results back for these ioctls since the error_idx will
 	   contain information on which control failed. */


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 14/18] media: v4l2-compat-ioctl32.c: refactor compat ioctl32 logic

[Mauro Carvalho Chehab]

From: Daniel Mentz <danielmentz@google.com>

commit a1dfb4c48cc1e64eeb7800a27c66a6f7e88d075a upstream.

The 32-bit compat v4l2 ioctl handling is implemented based on its 64-bit
equivalent. It converts 32-bit data structures into its 64-bit
equivalents and needs to provide the data to the 64-bit ioctl in user
space memory which is commonly allocated using
compat_alloc_user_space().

However, due to how that function is implemented, it can only be called
a single time for every syscall invocation.

Supposedly to avoid this limitation, the existing code uses a mix of
memory from the kernel stack and memory allocated through
compat_alloc_user_space().

Under normal circumstances, this would not work, because the 64-bit
ioctl expects all pointers to point to user space memory. As a
workaround, set_fs(KERNEL_DS) is called to temporarily disable this
extra safety check and allow kernel pointers. However, this might
introduce a security vulnerability: The result of the 32-bit to 64-bit
conversion is writeable by user space because the output buffer has been
allocated via compat_alloc_user_space(). A malicious user space process
could then manipulate pointers inside this output buffer, and due to the
previous set_fs(KERNEL_DS) call, functions like get_user() or put_user()
no longer prevent kernel memory access.

The new approach is to pre-calculate the total amount of user space
memory that is needed, allocate it using compat_alloc_user_space() and
then divide up the allocated memory to accommodate all data structures
that need to be converted.

An alternative approach would have been to retain the union type karg
that they allocated on the kernel stack in do_video_ioctl(), copy all
data from user space into karg and then back to user space. However, we
decided against this approach because it does not align with other
compat syscall implementations. Instead, we tried to replicate the
get_user/put_user pairs as found in other places in the kernel:

    if (get_user(clipcount, &up->clipcount) ||
        put_user(clipcount, &kp->clipcount)) return -EFAULT;

Notes from hans.verkuil@cisco.com:

This patch was taken from:
    https://github.com/LineageOS/android_kernel_samsung_apq8084/commit/97b733953c06e4f0398ade18850f0817778255f7

Clearly nobody could be bothered to upstream this patch or at minimum
tell us :-( We only heard about this a week ago.

This patch was rebased and cleaned up. Compared to the original I
also swapped the order of the convert_in_user arguments so that they
matched copy_in_user. It was hard to review otherwise. I also replaced
the ALLOC_USER_SPACE/ALLOC_AND_GET by a normal function.

Fixes: 6b5a9492ca ("v4l: introduce string control support.")

Signed-off-by: Daniel Mentz <danielmentz@google.com>
Co-developed-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 747 +++++++++++++++++---------
 1 file changed, 486 insertions(+), 261 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index 9e5807842dad..e03aa0961360 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -22,6 +22,14 @@
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-ioctl.h>
 
+/* Use the same argument order as copy_in_user */
+#define assign_in_user(to, from)					\
+({									\
+	typeof(*from) __assign_tmp;					\
+									\
+	get_user(__assign_tmp, from) || put_user(__assign_tmp, to);	\
+})
+
 static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	long ret = -ENOIOCTLCMD;
@@ -35,12 +43,12 @@ static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 struct v4l2_clip32 {
 	struct v4l2_rect        c;
-	compat_caddr_t 		next;
+	compat_caddr_t		next;
 };
 
 struct v4l2_window32 {
 	struct v4l2_rect        w;
-	__u32		  	field;	/* enum v4l2_field */
+	__u32			field;	/* enum v4l2_field */
 	__u32			chromakey;
 	compat_caddr_t		clips; /* actually struct v4l2_clip32 * */
 	__u32			clipcount;
@@ -48,37 +56,41 @@ struct v4l2_window32 {
 	__u8                    global_alpha;
 };
 
-static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
+static int get_v4l2_window32(struct v4l2_window __user *kp,
+			     struct v4l2_window32 __user *up,
+			     void __user *aux_buf, u32 aux_space)
 {
 	struct v4l2_clip32 __user *uclips;
 	struct v4l2_clip __user *kclips;
 	compat_caddr_t p;
-	u32 n;
+	u32 clipcount;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
-	    get_user(kp->field, &up->field) ||
-	    get_user(kp->chromakey, &up->chromakey) ||
-	    get_user(kp->clipcount, &up->clipcount) ||
-	    get_user(kp->global_alpha, &up->global_alpha))
+	    copy_in_user(&kp->w, &up->w, sizeof(up->w)) ||
+	    assign_in_user(&kp->field, &up->field) ||
+	    assign_in_user(&kp->chromakey, &up->chromakey) ||
+	    assign_in_user(&kp->global_alpha, &up->global_alpha) ||
+	    get_user(clipcount, &up->clipcount) ||
+	    put_user(clipcount, &kp->clipcount))
 		return -EFAULT;
-	if (kp->clipcount > 2048)
+	if (clipcount > 2048)
 		return -EINVAL;
-	if (!kp->clipcount) {
-		kp->clips = NULL;
-		return 0;
-	}
+	if (!clipcount)
+		return put_user(NULL, &kp->clips);
 
-	n = kp->clipcount;
 	if (get_user(p, &up->clips))
 		return -EFAULT;
 	uclips = compat_ptr(p);
-	kclips = compat_alloc_user_space(n * sizeof(*kclips));
-	kp->clips = kclips;
-	while (n--) {
+	if (aux_space < clipcount * sizeof(*kclips))
+		return -EFAULT;
+	kclips = aux_buf;
+	if (put_user(kclips, &kp->clips))
+		return -EFAULT;
+
+	while (clipcount--) {
 		if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
 			return -EFAULT;
-		if (put_user(n ? kclips + 1 : NULL, &kclips->next))
+		if (put_user(clipcount ? kclips + 1 : NULL, &kclips->next))
 			return -EFAULT;
 		uclips++;
 		kclips++;
@@ -86,27 +98,28 @@ static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user
 	return 0;
 }
 
-static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
+static int put_v4l2_window32(struct v4l2_window __user *kp,
+			     struct v4l2_window32 __user *up)
 {
 	struct v4l2_clip __user *kclips = kp->clips;
 	struct v4l2_clip32 __user *uclips;
-	u32 n = kp->clipcount;
 	compat_caddr_t p;
+	u32 clipcount;
 
-	if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
-	    put_user(kp->field, &up->field) ||
-	    put_user(kp->chromakey, &up->chromakey) ||
-	    put_user(kp->clipcount, &up->clipcount) ||
-	    put_user(kp->global_alpha, &up->global_alpha))
+	if (copy_in_user(&up->w, &kp->w, sizeof(kp->w)) ||
+	    assign_in_user(&up->field, &kp->field) ||
+	    assign_in_user(&up->chromakey, &kp->chromakey) ||
+	    assign_in_user(&up->global_alpha, &kp->global_alpha) ||
+	    get_user(clipcount, &kp->clipcount) ||
+	    put_user(clipcount, &up->clipcount))
 		return -EFAULT;
-
-	if (!kp->clipcount)
+	if (!clipcount)
 		return 0;
 
 	if (get_user(p, &up->clips))
 		return -EFAULT;
 	uclips = compat_ptr(p);
-	while (n--) {
+	while (clipcount--) {
 		if (copy_in_user(&uclips->c, &kclips->c, sizeof(uclips->c)))
 			return -EFAULT;
 		uclips++;
@@ -144,90 +157,150 @@ struct v4l2_create_buffers32 {
 	__u32			reserved[8];
 };
 
-static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
+static int __bufsize_v4l2_format(struct v4l2_format32 __user *up, u32 *size)
 {
-	if (get_user(kp->type, &up->type))
+	u32 type;
+
+	if (get_user(type, &up->type))
+		return -EFAULT;
+
+	switch (type) {
+	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
+		u32 clipcount;
+
+		if (get_user(clipcount, &up->fmt.win.clipcount))
+			return -EFAULT;
+		if (clipcount > 2048)
+			return -EINVAL;
+		*size = clipcount * sizeof(struct v4l2_clip);
+		return 0;
+	}
+	default:
+		*size = 0;
+		return 0;
+	}
+}
+
+static int bufsize_v4l2_format(struct v4l2_format32 __user *up, u32 *size)
+{
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
+		return -EFAULT;
+	return __bufsize_v4l2_format(up, size);
+}
+
+static int __get_v4l2_format32(struct v4l2_format __user *kp,
+			       struct v4l2_format32 __user *up,
+			       void __user *aux_buf, u32 aux_space)
+{
+	u32 type;
+
+	if (get_user(type, &up->type) || put_user(type, &kp->type))
 		return -EFAULT;
 
-	switch (kp->type) {
+	switch (type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-		return copy_from_user(&kp->fmt.pix, &up->fmt.pix,
-				      sizeof(kp->fmt.pix)) ? -EFAULT : 0;
+		return copy_in_user(&kp->fmt.pix, &up->fmt.pix,
+				    sizeof(kp->fmt.pix)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-		return copy_from_user(&kp->fmt.pix_mp, &up->fmt.pix_mp,
-				      sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
+		return copy_in_user(&kp->fmt.pix_mp, &up->fmt.pix_mp,
+				    sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
-		return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
+		return get_v4l2_window32(&kp->fmt.win, &up->fmt.win,
+					 aux_buf, aux_space);
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_VBI_OUTPUT:
-		return copy_from_user(&kp->fmt.vbi, &up->fmt.vbi,
-				      sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
+		return copy_in_user(&kp->fmt.vbi, &up->fmt.vbi,
+				    sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
-		return copy_from_user(&kp->fmt.sliced, &up->fmt.sliced,
-				      sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
+		return copy_in_user(&kp->fmt.sliced, &up->fmt.sliced,
+				    sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 	default:
 		return -EINVAL;
 	}
 }
 
-static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
+static int get_v4l2_format32(struct v4l2_format __user *kp,
+			     struct v4l2_format32 __user *up,
+			     void __user *aux_buf, u32 aux_space)
 {
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 		return -EFAULT;
-	return __get_v4l2_format32(kp, up);
+	return __get_v4l2_format32(kp, up, aux_buf, aux_space);
 }
 
-static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
+static int bufsize_v4l2_create(struct v4l2_create_buffers32 __user *up,
+			       u32 *size)
+{
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
+		return -EFAULT;
+	return __bufsize_v4l2_format(&up->format, size);
+}
+
+static int get_v4l2_create32(struct v4l2_create_buffers __user *kp,
+			     struct v4l2_create_buffers32 __user *up,
+			     void __user *aux_buf, u32 aux_space)
 {
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format)))
+	    copy_in_user(kp, up,
+			 offsetof(struct v4l2_create_buffers32, format)))
 		return -EFAULT;
-	return __get_v4l2_format32(&kp->format, &up->format);
+	return __get_v4l2_format32(&kp->format, &up->format,
+				   aux_buf, aux_space);
 }
 
-static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
+static int __put_v4l2_format32(struct v4l2_format __user *kp,
+			       struct v4l2_format32 __user *up)
 {
-	switch (kp->type) {
+	u32 type;
+
+	if (get_user(type, &kp->type))
+		return -EFAULT;
+
+	switch (type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-		return copy_to_user(&up->fmt.pix, &kp->fmt.pix,
-				    sizeof(kp->fmt.pix)) ?  -EFAULT : 0;
+		return copy_in_user(&up->fmt.pix, &kp->fmt.pix,
+				    sizeof(kp->fmt.pix)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-		return copy_to_user(&up->fmt.pix_mp, &kp->fmt.pix_mp,
-				    sizeof(kp->fmt.pix_mp)) ?  -EFAULT : 0;
+		return copy_in_user(&up->fmt.pix_mp, &kp->fmt.pix_mp,
+				    sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 		return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_VBI_OUTPUT:
-		return copy_to_user(&up->fmt.vbi, &kp->fmt.vbi,
-				    sizeof(kp->fmt.vbi)) ?  -EFAULT : 0;
+		return copy_in_user(&up->fmt.vbi, &kp->fmt.vbi,
+				    sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
-		return copy_to_user(&up->fmt.sliced, &kp->fmt.sliced,
-				    sizeof(kp->fmt.sliced)) ?  -EFAULT : 0;
+		return copy_in_user(&up->fmt.sliced, &kp->fmt.sliced,
+				    sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 	default:
 		return -EINVAL;
 	}
 }
 
-static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
+static int put_v4l2_format32(struct v4l2_format __user *kp,
+			     struct v4l2_format32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
 		return -EFAULT;
 	return __put_v4l2_format32(kp, up);
 }
 
-static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
+static int put_v4l2_create32(struct v4l2_create_buffers __user *kp,
+			     struct v4l2_create_buffers32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format)) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
+	    copy_in_user(up, kp,
+			 offsetof(struct v4l2_create_buffers32, format)) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
 	return __put_v4l2_format32(&kp->format, &up->format);
 }
@@ -241,24 +314,27 @@ struct v4l2_standard32 {
 	__u32		     reserved[4];
 };
 
-static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
+static int get_v4l2_standard32(struct v4l2_standard __user *kp,
+			       struct v4l2_standard32 __user *up)
 {
 	/* other fields are not set by the user, nor used by the driver */
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    get_user(kp->index, &up->index))
+	    assign_in_user(&kp->index, &up->index))
 		return -EFAULT;
 	return 0;
 }
 
-static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
+static int put_v4l2_standard32(struct v4l2_standard __user *kp,
+			       struct v4l2_standard32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->index, &up->index) ||
-	    copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
-	    copy_to_user(up->name, kp->name, sizeof(up->name)) ||
-	    copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
-	    put_user(kp->framelines, &up->framelines) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
+	    assign_in_user(&up->index, &kp->index) ||
+	    copy_in_user(&up->id, &kp->id, sizeof(up->id)) ||
+	    copy_in_user(up->name, kp->name, sizeof(up->name)) ||
+	    copy_in_user(&up->frameperiod, &kp->frameperiod,
+			 sizeof(up->frameperiod)) ||
+	    assign_in_user(&up->framelines, &kp->framelines) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -298,11 +374,11 @@ struct v4l2_buffer32 {
 	__u32			reserved;
 };
 
-static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
+static int get_v4l2_plane32(struct v4l2_plane __user *up,
+			    struct v4l2_plane32 __user *up32,
 			    enum v4l2_memory memory)
 {
-	void __user *up_pln;
-	compat_long_t p;
+	compat_ulong_t p;
 
 	if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
 	    copy_in_user(&up->data_offset, &up32->data_offset,
@@ -317,10 +393,8 @@ static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __
 			return -EFAULT;
 		break;
 	case V4L2_MEMORY_USERPTR:
-		if (get_user(p, &up32->m.userptr))
-			return -EFAULT;
-		up_pln = compat_ptr(p);
-		if (put_user((unsigned long)up_pln, &up->m.userptr))
+		if (get_user(p, &up32->m.userptr) ||
+		    put_user((unsigned long)compat_ptr(p), &up->m.userptr))
 			return -EFAULT;
 		break;
 	case V4L2_MEMORY_DMABUF:
@@ -332,7 +406,8 @@ static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __
 	return 0;
 }
 
-static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
+static int put_v4l2_plane32(struct v4l2_plane __user *up,
+			    struct v4l2_plane32 __user *up32,
 			    enum v4l2_memory memory)
 {
 	unsigned long p;
@@ -356,8 +431,7 @@ static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __
 			return -EFAULT;
 		break;
 	case V4L2_MEMORY_DMABUF:
-		if (copy_in_user(&up32->m.fd, &up->m.fd,
-				 sizeof(up->m.fd)))
+		if (copy_in_user(&up32->m.fd, &up->m.fd, sizeof(up->m.fd)))
 			return -EFAULT;
 		break;
 	}
@@ -365,37 +439,75 @@ static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __
 	return 0;
 }
 
-static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
+static int bufsize_v4l2_buffer(struct v4l2_buffer32 __user *up, u32 *size)
 {
+	u32 type;
+	u32 length;
+
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
+	    get_user(type, &up->type) ||
+	    get_user(length, &up->length))
+		return -EFAULT;
+
+	if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
+		if (length > VIDEO_MAX_PLANES)
+			return -EINVAL;
+
+		/*
+		 * We don't really care if userspace decides to kill itself
+		 * by passing a very big length value
+		 */
+		*size = length * sizeof(struct v4l2_plane);
+	} else {
+		*size = 0;
+	}
+	return 0;
+}
+
+static int get_v4l2_buffer32(struct v4l2_buffer __user *kp,
+			     struct v4l2_buffer32 __user *up,
+			     void __user *aux_buf, u32 aux_space)
+{
+	u32 type;
+	u32 length;
+	enum v4l2_memory memory;
 	struct v4l2_plane32 __user *uplane32;
 	struct v4l2_plane __user *uplane;
 	compat_caddr_t p;
-	int num_planes;
 	int ret;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    get_user(kp->index, &up->index) ||
-	    get_user(kp->type, &up->type) ||
-	    get_user(kp->flags, &up->flags) ||
-	    get_user(kp->memory, &up->memory) ||
-	    get_user(kp->length, &up->length))
+	    assign_in_user(&kp->index, &up->index) ||
+	    get_user(type, &up->type) ||
+	    put_user(type, &kp->type) ||
+	    assign_in_user(&kp->flags, &up->flags) ||
+	    get_user(memory, &up->memory) ||
+	    put_user(memory, &kp->memory) ||
+	    get_user(length, &up->length) ||
+	    put_user(length, &kp->length))
 		return -EFAULT;
 
-	if (V4L2_TYPE_IS_OUTPUT(kp->type))
-		if (get_user(kp->bytesused, &up->bytesused) ||
-		    get_user(kp->field, &up->field) ||
-		    get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-		    get_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec))
+	if (V4L2_TYPE_IS_OUTPUT(type))
+		if (assign_in_user(&kp->bytesused, &up->bytesused) ||
+		    assign_in_user(&kp->field, &up->field) ||
+		    assign_in_user(&kp->timestamp.tv_sec,
+				   &up->timestamp.tv_sec) ||
+		    assign_in_user(&kp->timestamp.tv_usec,
+				   &up->timestamp.tv_usec))
 			return -EFAULT;
 
-	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
-		num_planes = kp->length;
+	if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
+		u32 num_planes = length;
+
 		if (num_planes == 0) {
-			kp->m.planes = NULL;
-			/* num_planes == 0 is legal, e.g. when userspace doesn't
-			 * need planes array on DQBUF*/
-			return 0;
+			/*
+			 * num_planes == 0 is legal, e.g. when userspace doesn't
+			 * need planes array on DQBUF
+			 */
+			return put_user(NULL, &kp->m.planes);
 		}
+		if (num_planes > VIDEO_MAX_PLANES)
+			return -EINVAL;
 
 		if (get_user(p, &up->m.planes))
 			return -EFAULT;
@@ -405,37 +517,43 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 			       num_planes * sizeof(*uplane32)))
 			return -EFAULT;
 
-		/* We don't really care if userspace decides to kill itself
-		 * by passing a very big num_planes value */
-		uplane = compat_alloc_user_space(num_planes * sizeof(*uplane));
-		kp->m.planes = (__force struct v4l2_plane *)uplane;
+		/*
+		 * We don't really care if userspace decides to kill itself
+		 * by passing a very big num_planes value
+		 */
+		if (aux_space < num_planes * sizeof(*uplane))
+			return -EFAULT;
 
-		while (--num_planes >= 0) {
-			ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
+		uplane = aux_buf;
+		if (put_user((__force struct v4l2_plane *)uplane,
+			     &kp->m.planes))
+			return -EFAULT;
+
+		while (num_planes--) {
+			ret = get_v4l2_plane32(uplane, uplane32, memory);
 			if (ret)
 				return ret;
-			++uplane;
-			++uplane32;
+			uplane++;
+			uplane32++;
 		}
 	} else {
-		switch (kp->memory) {
+		switch (memory) {
 		case V4L2_MEMORY_MMAP:
 		case V4L2_MEMORY_OVERLAY:
-			if (get_user(kp->m.offset, &up->m.offset))
+			if (assign_in_user(&kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
-		case V4L2_MEMORY_USERPTR:
-			{
-				compat_long_t tmp;
+		case V4L2_MEMORY_USERPTR: {
+			compat_ulong_t userptr;
 
-				if (get_user(tmp, &up->m.userptr))
-					return -EFAULT;
-
-				kp->m.userptr = (unsigned long)compat_ptr(tmp);
-			}
+			if (get_user(userptr, &up->m.userptr) ||
+			    put_user((unsigned long)compat_ptr(userptr),
+				     &kp->m.userptr))
+				return -EFAULT;
 			break;
+		}
 		case V4L2_MEMORY_DMABUF:
-			if (get_user(kp->m.fd, &up->m.fd))
+			if (assign_in_user(&kp->m.fd, &up->m.fd))
 				return -EFAULT;
 			break;
 		}
@@ -444,62 +562,70 @@ static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 	return 0;
 }
 
-static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
+static int put_v4l2_buffer32(struct v4l2_buffer __user *kp,
+			     struct v4l2_buffer32 __user *up)
 {
+	u32 type;
+	u32 length;
+	enum v4l2_memory memory;
 	struct v4l2_plane32 __user *uplane32;
 	struct v4l2_plane __user *uplane;
 	compat_caddr_t p;
-	int num_planes;
 	int ret;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->index, &up->index) ||
-	    put_user(kp->type, &up->type) ||
-	    put_user(kp->flags, &up->flags) ||
-	    put_user(kp->memory, &up->memory))
+	    assign_in_user(&up->index, &kp->index) ||
+	    get_user(type, &kp->type) ||
+	    put_user(type, &up->type) ||
+	    assign_in_user(&up->flags, &kp->flags) ||
+	    get_user(memory, &kp->memory) ||
+	    put_user(memory, &up->memory))
 		return -EFAULT;
 
-	if (put_user(kp->bytesused, &up->bytesused) ||
-	    put_user(kp->field, &up->field) ||
-	    put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-	    put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
-	    copy_to_user(&up->timecode, &kp->timecode, sizeof(kp->timecode)) ||
-	    put_user(kp->sequence, &up->sequence) ||
-	    put_user(kp->reserved2, &up->reserved2) ||
-	    put_user(kp->reserved, &up->reserved) ||
-	    put_user(kp->length, &up->length))
+	if (assign_in_user(&up->bytesused, &kp->bytesused) ||
+	    assign_in_user(&up->field, &kp->field) ||
+	    assign_in_user(&up->timestamp.tv_sec, &kp->timestamp.tv_sec) ||
+	    assign_in_user(&up->timestamp.tv_usec, &kp->timestamp.tv_usec) ||
+	    copy_in_user(&up->timecode, &kp->timecode, sizeof(kp->timecode)) ||
+	    assign_in_user(&up->sequence, &kp->sequence) ||
+	    assign_in_user(&up->reserved2, &kp->reserved2) ||
+	    assign_in_user(&up->reserved, &kp->reserved) ||
+	    get_user(length, &kp->length) ||
+	    put_user(length, &up->length))
 		return -EFAULT;
 
-	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
-		num_planes = kp->length;
+	if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
+		u32 num_planes = length;
+
 		if (num_planes == 0)
 			return 0;
 
-		uplane = (__force struct v4l2_plane __user *)kp->m.planes;
+		if (get_user(uplane, ((__force struct v4l2_plane __user **)&kp->m.planes)))
+			return -EFAULT;
 		if (get_user(p, &up->m.planes))
 			return -EFAULT;
 		uplane32 = compat_ptr(p);
 
-		while (--num_planes >= 0) {
-			ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
+		while (num_planes--) {
+			ret = put_v4l2_plane32(uplane, uplane32, memory);
 			if (ret)
 				return ret;
 			++uplane;
 			++uplane32;
 		}
 	} else {
-		switch (kp->memory) {
+		switch (memory) {
 		case V4L2_MEMORY_MMAP:
 		case V4L2_MEMORY_OVERLAY:
-			if (put_user(kp->m.offset, &up->m.offset))
+			if (assign_in_user(&up->m.offset, &kp->m.offset))
 				return -EFAULT;
 			break;
 		case V4L2_MEMORY_USERPTR:
-			if (put_user(kp->m.userptr, &up->m.userptr))
+			if (assign_in_user(&up->m.userptr, &kp->m.userptr))
 				return -EFAULT;
 			break;
 		case V4L2_MEMORY_DMABUF:
-			if (put_user(kp->m.fd, &up->m.fd))
+			if (assign_in_user(&up->m.fd, &kp->m.fd))
 				return -EFAULT;
 			break;
 		}
@@ -511,7 +637,7 @@ static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user
 struct v4l2_framebuffer32 {
 	__u32			capability;
 	__u32			flags;
-	compat_caddr_t 		base;
+	compat_caddr_t		base;
 	struct {
 		__u32		width;
 		__u32		height;
@@ -524,29 +650,32 @@ struct v4l2_framebuffer32 {
 	} fmt;
 };
 
-static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
+static int get_v4l2_framebuffer32(struct v4l2_framebuffer __user *kp,
+				  struct v4l2_framebuffer32 __user *up)
 {
-	u32 tmp;
+	compat_caddr_t tmp;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(tmp, &up->base) ||
-	    get_user(kp->capability, &up->capability) ||
-	    get_user(kp->flags, &up->flags) ||
-	    copy_from_user(&kp->fmt, &up->fmt, sizeof(up->fmt)))
+	    put_user((__force void *)compat_ptr(tmp), &kp->base) ||
+	    assign_in_user(&kp->capability, &up->capability) ||
+	    assign_in_user(&kp->flags, &up->flags) ||
+	    copy_in_user(&kp->fmt, &up->fmt, sizeof(kp->fmt)))
 		return -EFAULT;
-	kp->base = (__force void *)compat_ptr(tmp);
 	return 0;
 }
 
-static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
+static int put_v4l2_framebuffer32(struct v4l2_framebuffer __user *kp,
+				  struct v4l2_framebuffer32 __user *up)
 {
-	u32 tmp = (u32)((unsigned long)kp->base);
+	void *base;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(tmp, &up->base) ||
-	    put_user(kp->capability, &up->capability) ||
-	    put_user(kp->flags, &up->flags) ||
-	    copy_to_user(&up->fmt, &kp->fmt, sizeof(up->fmt)))
+	    get_user(base, &kp->base) ||
+	    put_user(ptr_to_compat(base), &up->base) ||
+	    assign_in_user(&up->capability, &kp->capability) ||
+	    assign_in_user(&up->flags, &kp->flags) ||
+	    copy_in_user(&up->fmt, &kp->fmt, sizeof(kp->fmt)))
 		return -EFAULT;
 	return 0;
 }
@@ -559,21 +688,26 @@ struct v4l2_input32 {
 	__u32        tuner;             /*  Associated tuner */
 	v4l2_std_id  std;
 	__u32	     status;
-	__u32	     reserved[4];
-} __attribute__ ((packed));
+	__u32	     capabilities;
+	__u32	     reserved[3];
+};
 
-/* The 64-bit v4l2_input struct has extra padding at the end of the struct.
-   Otherwise it is identical to the 32-bit version. */
-static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
+/*
+ * The 64-bit v4l2_input struct has extra padding at the end of the struct.
+ * Otherwise it is identical to the 32-bit version.
+ */
+static inline int get_v4l2_input32(struct v4l2_input __user *kp,
+				   struct v4l2_input32 __user *up)
 {
-	if (copy_from_user(kp, up, sizeof(*up)))
+	if (copy_in_user(kp, up, sizeof(*up)))
 		return -EFAULT;
 	return 0;
 }
 
-static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
+static inline int put_v4l2_input32(struct v4l2_input __user *kp,
+				   struct v4l2_input32 __user *up)
 {
-	if (copy_to_user(up, kp, sizeof(*up)))
+	if (copy_in_user(up, kp, sizeof(*up)))
 		return -EFAULT;
 	return 0;
 }
@@ -627,40 +761,64 @@ static inline bool ctrl_is_pointer(struct file *file, u32 id)
 		(qec.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD);
 }
 
+static int bufsize_v4l2_ext_controls(struct v4l2_ext_controls32 __user *up,
+				     u32 *size)
+{
+	u32 count;
+
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
+	    get_user(count, &up->count))
+		return -EFAULT;
+	if (count > V4L2_CID_MAX_CTRLS)
+		return -EINVAL;
+	*size = count * sizeof(struct v4l2_ext_control);
+	return 0;
+}
+
 static int get_v4l2_ext_controls32(struct file *file,
-				   struct v4l2_ext_controls *kp,
-				   struct v4l2_ext_controls32 __user *up)
+				   struct v4l2_ext_controls __user *kp,
+				   struct v4l2_ext_controls32 __user *up,
+				   void __user *aux_buf, u32 aux_space)
 {
 	struct v4l2_ext_control32 __user *ucontrols;
 	struct v4l2_ext_control __user *kcontrols;
-	int n;
+	u32 count;
+	u32 n;
 	compat_caddr_t p;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    get_user(kp->ctrl_class, &up->ctrl_class) ||
-	    get_user(kp->count, &up->count) ||
-	    get_user(kp->error_idx, &up->error_idx) ||
-	    copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
+	    assign_in_user(&kp->ctrl_class, &up->ctrl_class) ||
+	    get_user(count, &up->count) ||
+	    put_user(count, &kp->count) ||
+	    assign_in_user(&kp->error_idx, &up->error_idx) ||
+	    copy_in_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
-	n = kp->count;
-	if (n == 0) {
-		kp->controls = NULL;
-		return 0;
-	}
+
+	if (count == 0)
+		return put_user(NULL, &kp->controls);
+	if (count > V4L2_CID_MAX_CTRLS)
+		return -EINVAL;
 	if (get_user(p, &up->controls))
 		return -EFAULT;
 	ucontrols = compat_ptr(p);
-	if (!access_ok(VERIFY_READ, ucontrols, n * sizeof(*ucontrols)))
+	if (!access_ok(VERIFY_READ, ucontrols, count * sizeof(*ucontrols)))
 		return -EFAULT;
-	kcontrols = compat_alloc_user_space(n * sizeof(*kcontrols));
-	kp->controls = (__force struct v4l2_ext_control *)kcontrols;
-	while (--n >= 0) {
+	if (aux_space < count * sizeof(*kcontrols))
+		return -EFAULT;
+	kcontrols = aux_buf;
+	if (put_user((__force struct v4l2_ext_control *)kcontrols,
+		     &kp->controls))
+		return -EFAULT;
+
+	for (n = 0; n < count; n++) {
 		u32 id;
 
 		if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
 			return -EFAULT;
+
 		if (get_user(id, &kcontrols->id))
 			return -EFAULT;
+
 		if (ctrl_is_pointer(file, id)) {
 			void __user *s;
 
@@ -677,43 +835,54 @@ static int get_v4l2_ext_controls32(struct file *file,
 }
 
 static int put_v4l2_ext_controls32(struct file *file,
-				   struct v4l2_ext_controls *kp,
+				   struct v4l2_ext_controls __user *kp,
 				   struct v4l2_ext_controls32 __user *up)
 {
 	struct v4l2_ext_control32 __user *ucontrols;
-	struct v4l2_ext_control __user *kcontrols =
-		(__force struct v4l2_ext_control __user *)kp->controls;
-	int n = kp->count;
+	struct v4l2_ext_control __user *kcontrols;
+	u32 count;
+	u32 n;
 	compat_caddr_t p;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->ctrl_class, &up->ctrl_class) ||
-	    put_user(kp->count, &up->count) ||
-	    put_user(kp->error_idx, &up->error_idx) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
+	    assign_in_user(&up->ctrl_class, &kp->ctrl_class) ||
+	    get_user(count, &kp->count) ||
+	    put_user(count, &up->count) ||
+	    assign_in_user(&up->error_idx, &kp->error_idx) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)) ||
+	    get_user(kcontrols, &kp->controls))
 		return -EFAULT;
-	if (!kp->count)
+
+	if (!count)
 		return 0;
-
 	if (get_user(p, &up->controls))
 		return -EFAULT;
 	ucontrols = compat_ptr(p);
-	if (!access_ok(VERIFY_WRITE, ucontrols, n * sizeof(*ucontrols)))
+	if (!access_ok(VERIFY_WRITE, ucontrols, count * sizeof(*ucontrols)))
 		return -EFAULT;
 
-	while (--n >= 0) {
-		unsigned size = sizeof(*ucontrols);
+	for (n = 0; n < count; n++) {
+		unsigned int size = sizeof(*ucontrols);
 		u32 id;
 
-		if (get_user(id, &kcontrols->id))
+		if (get_user(id, &kcontrols->id) ||
+		    put_user(id, &ucontrols->id) ||
+		    assign_in_user(&ucontrols->size, &kcontrols->size) ||
+		    copy_in_user(&ucontrols->reserved2, &kcontrols->reserved2,
+				 sizeof(ucontrols->reserved2)))
 			return -EFAULT;
-		/* Do not modify the pointer when copying a pointer control.
-		   The contents of the pointer was changed, not the pointer
-		   itself. */
+
+		/*
+		 * Do not modify the pointer when copying a pointer control.
+		 * The contents of the pointer was changed, not the pointer
+		 * itself.
+		 */
 		if (ctrl_is_pointer(file, id))
 			size -= sizeof(ucontrols->value64);
+
 		if (copy_in_user(ucontrols, kcontrols, size))
 			return -EFAULT;
+
 		ucontrols++;
 		kcontrols++;
 	}
@@ -732,17 +901,18 @@ struct v4l2_event32 {
 	__u32				reserved[8];
 };
 
-static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
+static int put_v4l2_event32(struct v4l2_event __user *kp,
+			    struct v4l2_event32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->type, &up->type) ||
-	    copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
-	    put_user(kp->pending, &up->pending) ||
-	    put_user(kp->sequence, &up->sequence) ||
-	    put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-	    put_user(kp->timestamp.tv_nsec, &up->timestamp.tv_nsec) ||
-	    put_user(kp->id, &up->id) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
+	    assign_in_user(&up->type, &kp->type) ||
+	    copy_in_user(&up->u, &kp->u, sizeof(kp->u)) ||
+	    assign_in_user(&up->pending, &kp->pending) ||
+	    assign_in_user(&up->sequence, &kp->sequence) ||
+	    assign_in_user(&up->timestamp.tv_sec, &kp->timestamp.tv_sec) ||
+	    assign_in_user(&up->timestamp.tv_nsec, &kp->timestamp.tv_nsec) ||
+	    assign_in_user(&up->id, &kp->id) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -755,31 +925,34 @@ struct v4l2_edid32 {
 	compat_caddr_t edid;
 };
 
-static int get_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
+static int get_v4l2_edid32(struct v4l2_edid __user *kp,
+			   struct v4l2_edid32 __user *up)
 {
-	u32 tmp;
+	compat_uptr_t tmp;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    get_user(kp->pad, &up->pad) ||
-	    get_user(kp->start_block, &up->start_block) ||
-	    get_user(kp->blocks, &up->blocks) ||
+	    assign_in_user(&kp->pad, &up->pad) ||
+	    assign_in_user(&kp->start_block, &up->start_block) ||
+	    assign_in_user(&kp->blocks, &up->blocks) ||
 	    get_user(tmp, &up->edid) ||
-	    copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
+	    put_user(compat_ptr(tmp), &kp->edid) ||
+	    copy_in_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
-	kp->edid = (__force u8 *)compat_ptr(tmp);
 	return 0;
 }
 
-static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
+static int put_v4l2_edid32(struct v4l2_edid __user *kp,
+			   struct v4l2_edid32 __user *up)
 {
-	u32 tmp = (u32)((unsigned long)kp->edid);
+	void *edid;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->pad, &up->pad) ||
-	    put_user(kp->start_block, &up->start_block) ||
-	    put_user(kp->blocks, &up->blocks) ||
-	    put_user(tmp, &up->edid) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
+	    assign_in_user(&up->pad, &kp->pad) ||
+	    assign_in_user(&up->start_block, &kp->start_block) ||
+	    assign_in_user(&up->blocks, &kp->blocks) ||
+	    get_user(edid, &kp->edid) ||
+	    put_user(ptr_to_compat(edid), &up->edid) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -796,7 +969,7 @@ static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
 #define VIDIOC_ENUMINPUT32	_IOWR('V', 26, struct v4l2_input32)
 #define VIDIOC_G_EDID32		_IOWR('V', 40, struct v4l2_edid32)
 #define VIDIOC_S_EDID32		_IOWR('V', 41, struct v4l2_edid32)
-#define VIDIOC_TRY_FMT32      	_IOWR('V', 64, struct v4l2_format32)
+#define VIDIOC_TRY_FMT32	_IOWR('V', 64, struct v4l2_format32)
 #define VIDIOC_G_EXT_CTRLS32    _IOWR('V', 71, struct v4l2_ext_controls32)
 #define VIDIOC_S_EXT_CTRLS32    _IOWR('V', 72, struct v4l2_ext_controls32)
 #define VIDIOC_TRY_EXT_CTRLS32  _IOWR('V', 73, struct v4l2_ext_controls32)
@@ -812,22 +985,23 @@ static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
 #define VIDIOC_G_OUTPUT32	_IOR ('V', 46, s32)
 #define VIDIOC_S_OUTPUT32	_IOWR('V', 47, s32)
 
+static int alloc_userspace(unsigned int size, u32 aux_space,
+			   void __user **up_native)
+{
+	*up_native = compat_alloc_user_space(size + aux_space);
+	if (!*up_native)
+		return -ENOMEM;
+	if (clear_user(*up_native, size))
+		return -EFAULT;
+	return 0;
+}
+
 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
-	union {
-		struct v4l2_format v2f;
-		struct v4l2_buffer v2b;
-		struct v4l2_framebuffer v2fb;
-		struct v4l2_input v2i;
-		struct v4l2_standard v2s;
-		struct v4l2_ext_controls v2ecs;
-		struct v4l2_event v2ev;
-		struct v4l2_create_buffers v2crt;
-		struct v4l2_edid v2edid;
-		unsigned long vx;
-		int vi;
-	} karg;
 	void __user *up = compat_ptr(arg);
+	void __user *up_native = NULL;
+	void __user *aux_buf;
+	u32 aux_space;
 	int compatible_arg = 1;
 	long err = 0;
 
@@ -866,30 +1040,52 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 	case VIDIOC_STREAMOFF:
 	case VIDIOC_S_INPUT:
 	case VIDIOC_S_OUTPUT:
-		err = get_user(karg.vi, (s32 __user *)up);
+		err = alloc_userspace(sizeof(unsigned int), 0, &up_native);
+		if (!err && assign_in_user((unsigned int __user *)up_native,
+					   (compat_uint_t __user *)up))
+			err = -EFAULT;
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_INPUT:
 	case VIDIOC_G_OUTPUT:
+		err = alloc_userspace(sizeof(unsigned int), 0, &up_native);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_EDID:
 	case VIDIOC_S_EDID:
-		err = get_v4l2_edid32(&karg.v2edid, up);
+		err = alloc_userspace(sizeof(struct v4l2_edid), 0, &up_native);
+		if (!err)
+			err = get_v4l2_edid32(up_native, up);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_FMT:
 	case VIDIOC_S_FMT:
 	case VIDIOC_TRY_FMT:
-		err = get_v4l2_format32(&karg.v2f, up);
+		err = bufsize_v4l2_format(up, &aux_space);
+		if (!err)
+			err = alloc_userspace(sizeof(struct v4l2_format),
+					      aux_space, &up_native);
+		if (!err) {
+			aux_buf = up_native + sizeof(struct v4l2_format);
+			err = get_v4l2_format32(up_native, up,
+						aux_buf, aux_space);
+		}
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_CREATE_BUFS:
-		err = get_v4l2_create32(&karg.v2crt, up);
+		err = bufsize_v4l2_create(up, &aux_space);
+		if (!err)
+			err = alloc_userspace(sizeof(struct v4l2_create_buffers),
+					      aux_space, &up_native);
+		if (!err) {
+			aux_buf = up_native + sizeof(struct v4l2_create_buffers);
+			err = get_v4l2_create32(up_native, up,
+						aux_buf, aux_space);
+		}
 		compatible_arg = 0;
 		break;
 
@@ -897,36 +1093,63 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 	case VIDIOC_QUERYBUF:
 	case VIDIOC_QBUF:
 	case VIDIOC_DQBUF:
-		err = get_v4l2_buffer32(&karg.v2b, up);
+		err = bufsize_v4l2_buffer(up, &aux_space);
+		if (!err)
+			err = alloc_userspace(sizeof(struct v4l2_buffer),
+					      aux_space, &up_native);
+		if (!err) {
+			aux_buf = up_native + sizeof(struct v4l2_buffer);
+			err = get_v4l2_buffer32(up_native, up,
+						aux_buf, aux_space);
+		}
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_S_FBUF:
-		err = get_v4l2_framebuffer32(&karg.v2fb, up);
+		err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0,
+				      &up_native);
+		if (!err)
+			err = get_v4l2_framebuffer32(up_native, up);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_FBUF:
+		err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0,
+				      &up_native);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_ENUMSTD:
-		err = get_v4l2_standard32(&karg.v2s, up);
+		err = alloc_userspace(sizeof(struct v4l2_standard), 0,
+				      &up_native);
+		if (!err)
+			err = get_v4l2_standard32(up_native, up);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_ENUMINPUT:
-		err = get_v4l2_input32(&karg.v2i, up);
+		err = alloc_userspace(sizeof(struct v4l2_input), 0, &up_native);
+		if (!err)
+			err = get_v4l2_input32(up_native, up);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_EXT_CTRLS:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_TRY_EXT_CTRLS:
-		err = get_v4l2_ext_controls32(file, &karg.v2ecs, up);
+		err = bufsize_v4l2_ext_controls(up, &aux_space);
+		if (!err)
+			err = alloc_userspace(sizeof(struct v4l2_ext_controls),
+					      aux_space, &up_native);
+		if (!err) {
+			aux_buf = up_native + sizeof(struct v4l2_ext_controls);
+			err = get_v4l2_ext_controls32(file, up_native, up,
+						      aux_buf, aux_space);
+		}
 		compatible_arg = 0;
 		break;
 	case VIDIOC_DQEVENT:
+		err = alloc_userspace(sizeof(struct v4l2_event), 0, &up_native);
 		compatible_arg = 0;
 		break;
 	}
@@ -935,25 +1158,26 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 
 	if (compatible_arg)
 		err = native_ioctl(file, cmd, (unsigned long)up);
-	else {
-		mm_segment_t old_fs = get_fs();
-
-		set_fs(KERNEL_DS);
-		err = native_ioctl(file, cmd, (unsigned long)&karg);
-		set_fs(old_fs);
-	}
+	else
+		err = native_ioctl(file, cmd, (unsigned long)up_native);
 
 	if (err == -ENOTTY)
 		return err;
 
-	/* Special case: even after an error we need to put the
-	   results back for these ioctls since the error_idx will
-	   contain information on which control failed. */
+	/*
+	 * Special case: even after an error we need to put the
+	 * results back for these ioctls since the error_idx will
+	 * contain information on which control failed.
+	 */
 	switch (cmd) {
 	case VIDIOC_G_EXT_CTRLS:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_TRY_EXT_CTRLS:
-		if (put_v4l2_ext_controls32(file, &karg.v2ecs, up))
+		if (put_v4l2_ext_controls32(file, up_native, up))
+			err = -EFAULT;
+		break;
+	case VIDIOC_S_EDID:
+		if (put_v4l2_edid32(up_native, up))
 			err = -EFAULT;
 		break;
 	}
@@ -965,45 +1189,46 @@ static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 	case VIDIOC_S_OUTPUT:
 	case VIDIOC_G_INPUT:
 	case VIDIOC_G_OUTPUT:
-		err = put_user(((s32)karg.vi), (s32 __user *)up);
+		if (assign_in_user((compat_uint_t __user *)up,
+				   ((unsigned int __user *)up_native)))
+			err = -EFAULT;
 		break;
 
 	case VIDIOC_G_FBUF:
-		err = put_v4l2_framebuffer32(&karg.v2fb, up);
+		err = put_v4l2_framebuffer32(up_native, up);
 		break;
 
 	case VIDIOC_DQEVENT:
-		err = put_v4l2_event32(&karg.v2ev, up);
+		err = put_v4l2_event32(up_native, up);
 		break;
 
 	case VIDIOC_G_EDID:
-	case VIDIOC_S_EDID:
-		err = put_v4l2_edid32(&karg.v2edid, up);
+		err = put_v4l2_edid32(up_native, up);
 		break;
 
 	case VIDIOC_G_FMT:
 	case VIDIOC_S_FMT:
 	case VIDIOC_TRY_FMT:
-		err = put_v4l2_format32(&karg.v2f, up);
+		err = put_v4l2_format32(up_native, up);
 		break;
 
 	case VIDIOC_CREATE_BUFS:
-		err = put_v4l2_create32(&karg.v2crt, up);
+		err = put_v4l2_create32(up_native, up);
 		break;
 
 	case VIDIOC_PREPARE_BUF:
 	case VIDIOC_QUERYBUF:
 	case VIDIOC_QBUF:
 	case VIDIOC_DQBUF:
-		err = put_v4l2_buffer32(&karg.v2b, up);
+		err = put_v4l2_buffer32(up_native, up);
 		break;
 
 	case VIDIOC_ENUMSTD:
-		err = put_v4l2_standard32(&karg.v2s, up);
+		err = put_v4l2_standard32(up_native, up);
 		break;
 
 	case VIDIOC_ENUMINPUT:
-		err = put_v4l2_input32(&karg.v2i, up);
+		err = put_v4l2_input32(up_native, up);
 		break;
 	}
 	return err;
-- 
2.14.3

Patch "media: v4l2-compat-ioctl32.c: refactor compat ioctl32 logic" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: refactor compat ioctl32 logic

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:33 -0300
Subject: media: v4l2-compat-ioctl32.c: refactor compat ioctl32 logic
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Daniel Mentz <danielmentz@google.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <10af8cdf1226db8dfc7e85673ee3a7a17ba969f2.1522260310.git.mchehab@s-opensource.com>

From: Daniel Mentz <danielmentz@google.com>

commit a1dfb4c48cc1e64eeb7800a27c66a6f7e88d075a upstream.

The 32-bit compat v4l2 ioctl handling is implemented based on its 64-bit
equivalent. It converts 32-bit data structures into its 64-bit
equivalents and needs to provide the data to the 64-bit ioctl in user
space memory which is commonly allocated using
compat_alloc_user_space().

However, due to how that function is implemented, it can only be called
a single time for every syscall invocation.

Supposedly to avoid this limitation, the existing code uses a mix of
memory from the kernel stack and memory allocated through
compat_alloc_user_space().

Under normal circumstances, this would not work, because the 64-bit
ioctl expects all pointers to point to user space memory. As a
workaround, set_fs(KERNEL_DS) is called to temporarily disable this
extra safety check and allow kernel pointers. However, this might
introduce a security vulnerability: The result of the 32-bit to 64-bit
conversion is writeable by user space because the output buffer has been
allocated via compat_alloc_user_space(). A malicious user space process
could then manipulate pointers inside this output buffer, and due to the
previous set_fs(KERNEL_DS) call, functions like get_user() or put_user()
no longer prevent kernel memory access.

The new approach is to pre-calculate the total amount of user space
memory that is needed, allocate it using compat_alloc_user_space() and
then divide up the allocated memory to accommodate all data structures
that need to be converted.

An alternative approach would have been to retain the union type karg
that they allocated on the kernel stack in do_video_ioctl(), copy all
data from user space into karg and then back to user space. However, we
decided against this approach because it does not align with other
compat syscall implementations. Instead, we tried to replicate the
get_user/put_user pairs as found in other places in the kernel:

    if (get_user(clipcount, &up->clipcount) ||
        put_user(clipcount, &kp->clipcount)) return -EFAULT;

Notes from hans.verkuil@cisco.com:

This patch was taken from:
    https://github.com/LineageOS/android_kernel_samsung_apq8084/commit/97b733953c06e4f0398ade18850f0817778255f7

Clearly nobody could be bothered to upstream this patch or at minimum
tell us :-( We only heard about this a week ago.

This patch was rebased and cleaned up. Compared to the original I
also swapped the order of the convert_in_user arguments so that they
matched copy_in_user. It was hard to review otherwise. I also replaced
the ALLOC_USER_SPACE/ALLOC_AND_GET by a normal function.

Fixes: 6b5a9492ca ("v4l: introduce string control support.")

Signed-off-by: Daniel Mentz <danielmentz@google.com>
Co-developed-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |  757 ++++++++++++++++----------
 1 file changed, 491 insertions(+), 266 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -22,6 +22,14 @@
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-ioctl.h>
 
+/* Use the same argument order as copy_in_user */
+#define assign_in_user(to, from)					\
+({									\
+	typeof(*from) __assign_tmp;					\
+									\
+	get_user(__assign_tmp, from) || put_user(__assign_tmp, to);	\
+})
+
 static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	long ret = -ENOIOCTLCMD;
@@ -35,12 +43,12 @@ static long native_ioctl(struct file *fi
 
 struct v4l2_clip32 {
 	struct v4l2_rect        c;
-	compat_caddr_t 		next;
+	compat_caddr_t		next;
 };
 
 struct v4l2_window32 {
 	struct v4l2_rect        w;
-	__u32		  	field;	/* enum v4l2_field */
+	__u32			field;	/* enum v4l2_field */
 	__u32			chromakey;
 	compat_caddr_t		clips; /* actually struct v4l2_clip32 * */
 	__u32			clipcount;
@@ -48,37 +56,41 @@ struct v4l2_window32 {
 	__u8                    global_alpha;
 };
 
-static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
+static int get_v4l2_window32(struct v4l2_window __user *kp,
+			     struct v4l2_window32 __user *up,
+			     void __user *aux_buf, u32 aux_space)
 {
 	struct v4l2_clip32 __user *uclips;
 	struct v4l2_clip __user *kclips;
 	compat_caddr_t p;
-	u32 n;
+	u32 clipcount;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
-	    get_user(kp->field, &up->field) ||
-	    get_user(kp->chromakey, &up->chromakey) ||
-	    get_user(kp->clipcount, &up->clipcount) ||
-	    get_user(kp->global_alpha, &up->global_alpha))
+	    copy_in_user(&kp->w, &up->w, sizeof(up->w)) ||
+	    assign_in_user(&kp->field, &up->field) ||
+	    assign_in_user(&kp->chromakey, &up->chromakey) ||
+	    assign_in_user(&kp->global_alpha, &up->global_alpha) ||
+	    get_user(clipcount, &up->clipcount) ||
+	    put_user(clipcount, &kp->clipcount))
 		return -EFAULT;
-	if (kp->clipcount > 2048)
+	if (clipcount > 2048)
 		return -EINVAL;
-	if (!kp->clipcount) {
-		kp->clips = NULL;
-		return 0;
-	}
+	if (!clipcount)
+		return put_user(NULL, &kp->clips);
 
-	n = kp->clipcount;
 	if (get_user(p, &up->clips))
 		return -EFAULT;
 	uclips = compat_ptr(p);
-	kclips = compat_alloc_user_space(n * sizeof(*kclips));
-	kp->clips = kclips;
-	while (n--) {
+	if (aux_space < clipcount * sizeof(*kclips))
+		return -EFAULT;
+	kclips = aux_buf;
+	if (put_user(kclips, &kp->clips))
+		return -EFAULT;
+
+	while (clipcount--) {
 		if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
 			return -EFAULT;
-		if (put_user(n ? kclips + 1 : NULL, &kclips->next))
+		if (put_user(clipcount ? kclips + 1 : NULL, &kclips->next))
 			return -EFAULT;
 		uclips++;
 		kclips++;
@@ -86,27 +98,28 @@ static int get_v4l2_window32(struct v4l2
 	return 0;
 }
 
-static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
+static int put_v4l2_window32(struct v4l2_window __user *kp,
+			     struct v4l2_window32 __user *up)
 {
 	struct v4l2_clip __user *kclips = kp->clips;
 	struct v4l2_clip32 __user *uclips;
-	u32 n = kp->clipcount;
 	compat_caddr_t p;
+	u32 clipcount;
 
-	if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
-	    put_user(kp->field, &up->field) ||
-	    put_user(kp->chromakey, &up->chromakey) ||
-	    put_user(kp->clipcount, &up->clipcount) ||
-	    put_user(kp->global_alpha, &up->global_alpha))
+	if (copy_in_user(&up->w, &kp->w, sizeof(kp->w)) ||
+	    assign_in_user(&up->field, &kp->field) ||
+	    assign_in_user(&up->chromakey, &kp->chromakey) ||
+	    assign_in_user(&up->global_alpha, &kp->global_alpha) ||
+	    get_user(clipcount, &kp->clipcount) ||
+	    put_user(clipcount, &up->clipcount))
 		return -EFAULT;
-
-	if (!kp->clipcount)
+	if (!clipcount)
 		return 0;
 
 	if (get_user(p, &up->clips))
 		return -EFAULT;
 	uclips = compat_ptr(p);
-	while (n--) {
+	while (clipcount--) {
 		if (copy_in_user(&uclips->c, &kclips->c, sizeof(uclips->c)))
 			return -EFAULT;
 		uclips++;
@@ -144,90 +157,150 @@ struct v4l2_create_buffers32 {
 	__u32			reserved[8];
 };
 
-static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
+static int __bufsize_v4l2_format(struct v4l2_format32 __user *up, u32 *size)
+{
+	u32 type;
+
+	if (get_user(type, &up->type))
+		return -EFAULT;
+
+	switch (type) {
+	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
+		u32 clipcount;
+
+		if (get_user(clipcount, &up->fmt.win.clipcount))
+			return -EFAULT;
+		if (clipcount > 2048)
+			return -EINVAL;
+		*size = clipcount * sizeof(struct v4l2_clip);
+		return 0;
+	}
+	default:
+		*size = 0;
+		return 0;
+	}
+}
+
+static int bufsize_v4l2_format(struct v4l2_format32 __user *up, u32 *size)
 {
-	if (get_user(kp->type, &up->type))
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 		return -EFAULT;
+	return __bufsize_v4l2_format(up, size);
+}
 
-	switch (kp->type) {
+static int __get_v4l2_format32(struct v4l2_format __user *kp,
+			       struct v4l2_format32 __user *up,
+			       void __user *aux_buf, u32 aux_space)
+{
+	u32 type;
+
+	if (get_user(type, &up->type) || put_user(type, &kp->type))
+		return -EFAULT;
+
+	switch (type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-		return copy_from_user(&kp->fmt.pix, &up->fmt.pix,
-				      sizeof(kp->fmt.pix)) ? -EFAULT : 0;
+		return copy_in_user(&kp->fmt.pix, &up->fmt.pix,
+				    sizeof(kp->fmt.pix)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-		return copy_from_user(&kp->fmt.pix_mp, &up->fmt.pix_mp,
-				      sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
+		return copy_in_user(&kp->fmt.pix_mp, &up->fmt.pix_mp,
+				    sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
-		return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
+		return get_v4l2_window32(&kp->fmt.win, &up->fmt.win,
+					 aux_buf, aux_space);
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_VBI_OUTPUT:
-		return copy_from_user(&kp->fmt.vbi, &up->fmt.vbi,
-				      sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
+		return copy_in_user(&kp->fmt.vbi, &up->fmt.vbi,
+				    sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
-		return copy_from_user(&kp->fmt.sliced, &up->fmt.sliced,
-				      sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
+		return copy_in_user(&kp->fmt.sliced, &up->fmt.sliced,
+				    sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 	default:
 		return -EINVAL;
 	}
 }
 
-static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
+static int get_v4l2_format32(struct v4l2_format __user *kp,
+			     struct v4l2_format32 __user *up,
+			     void __user *aux_buf, u32 aux_space)
 {
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 		return -EFAULT;
-	return __get_v4l2_format32(kp, up);
+	return __get_v4l2_format32(kp, up, aux_buf, aux_space);
 }
 
-static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
+static int bufsize_v4l2_create(struct v4l2_create_buffers32 __user *up,
+			       u32 *size)
+{
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
+		return -EFAULT;
+	return __bufsize_v4l2_format(&up->format, size);
+}
+
+static int get_v4l2_create32(struct v4l2_create_buffers __user *kp,
+			     struct v4l2_create_buffers32 __user *up,
+			     void __user *aux_buf, u32 aux_space)
 {
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format)))
+	    copy_in_user(kp, up,
+			 offsetof(struct v4l2_create_buffers32, format)))
 		return -EFAULT;
-	return __get_v4l2_format32(&kp->format, &up->format);
+	return __get_v4l2_format32(&kp->format, &up->format,
+				   aux_buf, aux_space);
 }
 
-static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
+static int __put_v4l2_format32(struct v4l2_format __user *kp,
+			       struct v4l2_format32 __user *up)
 {
-	switch (kp->type) {
+	u32 type;
+
+	if (get_user(type, &kp->type))
+		return -EFAULT;
+
+	switch (type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-		return copy_to_user(&up->fmt.pix, &kp->fmt.pix,
-				    sizeof(kp->fmt.pix)) ?  -EFAULT : 0;
+		return copy_in_user(&up->fmt.pix, &kp->fmt.pix,
+				    sizeof(kp->fmt.pix)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-		return copy_to_user(&up->fmt.pix_mp, &kp->fmt.pix_mp,
-				    sizeof(kp->fmt.pix_mp)) ?  -EFAULT : 0;
+		return copy_in_user(&up->fmt.pix_mp, &kp->fmt.pix_mp,
+				    sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 		return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_VBI_OUTPUT:
-		return copy_to_user(&up->fmt.vbi, &kp->fmt.vbi,
-				    sizeof(kp->fmt.vbi)) ?  -EFAULT : 0;
+		return copy_in_user(&up->fmt.vbi, &kp->fmt.vbi,
+				    sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
-		return copy_to_user(&up->fmt.sliced, &kp->fmt.sliced,
-				    sizeof(kp->fmt.sliced)) ?  -EFAULT : 0;
+		return copy_in_user(&up->fmt.sliced, &kp->fmt.sliced,
+				    sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 	default:
 		return -EINVAL;
 	}
 }
 
-static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
+static int put_v4l2_format32(struct v4l2_format __user *kp,
+			     struct v4l2_format32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
 		return -EFAULT;
 	return __put_v4l2_format32(kp, up);
 }
 
-static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
+static int put_v4l2_create32(struct v4l2_create_buffers __user *kp,
+			     struct v4l2_create_buffers32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format)) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
+	    copy_in_user(up, kp,
+			 offsetof(struct v4l2_create_buffers32, format)) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
 	return __put_v4l2_format32(&kp->format, &up->format);
 }
@@ -241,24 +314,27 @@ struct v4l2_standard32 {
 	__u32		     reserved[4];
 };
 
-static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
+static int get_v4l2_standard32(struct v4l2_standard __user *kp,
+			       struct v4l2_standard32 __user *up)
 {
 	/* other fields are not set by the user, nor used by the driver */
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    get_user(kp->index, &up->index))
+	    assign_in_user(&kp->index, &up->index))
 		return -EFAULT;
 	return 0;
 }
 
-static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
+static int put_v4l2_standard32(struct v4l2_standard __user *kp,
+			       struct v4l2_standard32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->index, &up->index) ||
-	    copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
-	    copy_to_user(up->name, kp->name, sizeof(up->name)) ||
-	    copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
-	    put_user(kp->framelines, &up->framelines) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
+	    assign_in_user(&up->index, &kp->index) ||
+	    copy_in_user(&up->id, &kp->id, sizeof(up->id)) ||
+	    copy_in_user(up->name, kp->name, sizeof(up->name)) ||
+	    copy_in_user(&up->frameperiod, &kp->frameperiod,
+			 sizeof(up->frameperiod)) ||
+	    assign_in_user(&up->framelines, &kp->framelines) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -298,11 +374,11 @@ struct v4l2_buffer32 {
 	__u32			reserved;
 };
 
-static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
+static int get_v4l2_plane32(struct v4l2_plane __user *up,
+			    struct v4l2_plane32 __user *up32,
 			    enum v4l2_memory memory)
 {
-	void __user *up_pln;
-	compat_long_t p;
+	compat_ulong_t p;
 
 	if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
 	    copy_in_user(&up->data_offset, &up32->data_offset,
@@ -317,10 +393,8 @@ static int get_v4l2_plane32(struct v4l2_
 			return -EFAULT;
 		break;
 	case V4L2_MEMORY_USERPTR:
-		if (get_user(p, &up32->m.userptr))
-			return -EFAULT;
-		up_pln = compat_ptr(p);
-		if (put_user((unsigned long)up_pln, &up->m.userptr))
+		if (get_user(p, &up32->m.userptr) ||
+		    put_user((unsigned long)compat_ptr(p), &up->m.userptr))
 			return -EFAULT;
 		break;
 	case V4L2_MEMORY_DMABUF:
@@ -332,7 +406,8 @@ static int get_v4l2_plane32(struct v4l2_
 	return 0;
 }
 
-static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
+static int put_v4l2_plane32(struct v4l2_plane __user *up,
+			    struct v4l2_plane32 __user *up32,
 			    enum v4l2_memory memory)
 {
 	unsigned long p;
@@ -356,8 +431,7 @@ static int put_v4l2_plane32(struct v4l2_
 			return -EFAULT;
 		break;
 	case V4L2_MEMORY_DMABUF:
-		if (copy_in_user(&up32->m.fd, &up->m.fd,
-				 sizeof(up->m.fd)))
+		if (copy_in_user(&up32->m.fd, &up->m.fd, sizeof(up->m.fd)))
 			return -EFAULT;
 		break;
 	}
@@ -365,37 +439,75 @@ static int put_v4l2_plane32(struct v4l2_
 	return 0;
 }
 
-static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
+static int bufsize_v4l2_buffer(struct v4l2_buffer32 __user *up, u32 *size)
 {
+	u32 type;
+	u32 length;
+
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
+	    get_user(type, &up->type) ||
+	    get_user(length, &up->length))
+		return -EFAULT;
+
+	if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
+		if (length > VIDEO_MAX_PLANES)
+			return -EINVAL;
+
+		/*
+		 * We don't really care if userspace decides to kill itself
+		 * by passing a very big length value
+		 */
+		*size = length * sizeof(struct v4l2_plane);
+	} else {
+		*size = 0;
+	}
+	return 0;
+}
+
+static int get_v4l2_buffer32(struct v4l2_buffer __user *kp,
+			     struct v4l2_buffer32 __user *up,
+			     void __user *aux_buf, u32 aux_space)
+{
+	u32 type;
+	u32 length;
+	enum v4l2_memory memory;
 	struct v4l2_plane32 __user *uplane32;
 	struct v4l2_plane __user *uplane;
 	compat_caddr_t p;
-	int num_planes;
 	int ret;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    get_user(kp->index, &up->index) ||
-	    get_user(kp->type, &up->type) ||
-	    get_user(kp->flags, &up->flags) ||
-	    get_user(kp->memory, &up->memory) ||
-	    get_user(kp->length, &up->length))
-		return -EFAULT;
-
-	if (V4L2_TYPE_IS_OUTPUT(kp->type))
-		if (get_user(kp->bytesused, &up->bytesused) ||
-		    get_user(kp->field, &up->field) ||
-		    get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-		    get_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec))
+	    assign_in_user(&kp->index, &up->index) ||
+	    get_user(type, &up->type) ||
+	    put_user(type, &kp->type) ||
+	    assign_in_user(&kp->flags, &up->flags) ||
+	    get_user(memory, &up->memory) ||
+	    put_user(memory, &kp->memory) ||
+	    get_user(length, &up->length) ||
+	    put_user(length, &kp->length))
+		return -EFAULT;
+
+	if (V4L2_TYPE_IS_OUTPUT(type))
+		if (assign_in_user(&kp->bytesused, &up->bytesused) ||
+		    assign_in_user(&kp->field, &up->field) ||
+		    assign_in_user(&kp->timestamp.tv_sec,
+				   &up->timestamp.tv_sec) ||
+		    assign_in_user(&kp->timestamp.tv_usec,
+				   &up->timestamp.tv_usec))
 			return -EFAULT;
 
-	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
-		num_planes = kp->length;
+	if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
+		u32 num_planes = length;
+
 		if (num_planes == 0) {
-			kp->m.planes = NULL;
-			/* num_planes == 0 is legal, e.g. when userspace doesn't
-			 * need planes array on DQBUF*/
-			return 0;
+			/*
+			 * num_planes == 0 is legal, e.g. when userspace doesn't
+			 * need planes array on DQBUF
+			 */
+			return put_user(NULL, &kp->m.planes);
 		}
+		if (num_planes > VIDEO_MAX_PLANES)
+			return -EINVAL;
 
 		if (get_user(p, &up->m.planes))
 			return -EFAULT;
@@ -405,37 +517,43 @@ static int get_v4l2_buffer32(struct v4l2
 			       num_planes * sizeof(*uplane32)))
 			return -EFAULT;
 
-		/* We don't really care if userspace decides to kill itself
-		 * by passing a very big num_planes value */
-		uplane = compat_alloc_user_space(num_planes * sizeof(*uplane));
-		kp->m.planes = (__force struct v4l2_plane *)uplane;
+		/*
+		 * We don't really care if userspace decides to kill itself
+		 * by passing a very big num_planes value
+		 */
+		if (aux_space < num_planes * sizeof(*uplane))
+			return -EFAULT;
+
+		uplane = aux_buf;
+		if (put_user((__force struct v4l2_plane *)uplane,
+			     &kp->m.planes))
+			return -EFAULT;
 
-		while (--num_planes >= 0) {
-			ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
+		while (num_planes--) {
+			ret = get_v4l2_plane32(uplane, uplane32, memory);
 			if (ret)
 				return ret;
-			++uplane;
-			++uplane32;
+			uplane++;
+			uplane32++;
 		}
 	} else {
-		switch (kp->memory) {
+		switch (memory) {
 		case V4L2_MEMORY_MMAP:
 		case V4L2_MEMORY_OVERLAY:
-			if (get_user(kp->m.offset, &up->m.offset))
+			if (assign_in_user(&kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
-		case V4L2_MEMORY_USERPTR:
-			{
-				compat_long_t tmp;
+		case V4L2_MEMORY_USERPTR: {
+			compat_ulong_t userptr;
 
-				if (get_user(tmp, &up->m.userptr))
-					return -EFAULT;
-
-				kp->m.userptr = (unsigned long)compat_ptr(tmp);
-			}
+			if (get_user(userptr, &up->m.userptr) ||
+			    put_user((unsigned long)compat_ptr(userptr),
+				     &kp->m.userptr))
+				return -EFAULT;
 			break;
+		}
 		case V4L2_MEMORY_DMABUF:
-			if (get_user(kp->m.fd, &up->m.fd))
+			if (assign_in_user(&kp->m.fd, &up->m.fd))
 				return -EFAULT;
 			break;
 		}
@@ -444,62 +562,70 @@ static int get_v4l2_buffer32(struct v4l2
 	return 0;
 }
 
-static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
+static int put_v4l2_buffer32(struct v4l2_buffer __user *kp,
+			     struct v4l2_buffer32 __user *up)
 {
+	u32 type;
+	u32 length;
+	enum v4l2_memory memory;
 	struct v4l2_plane32 __user *uplane32;
 	struct v4l2_plane __user *uplane;
 	compat_caddr_t p;
-	int num_planes;
 	int ret;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->index, &up->index) ||
-	    put_user(kp->type, &up->type) ||
-	    put_user(kp->flags, &up->flags) ||
-	    put_user(kp->memory, &up->memory))
-		return -EFAULT;
-
-	if (put_user(kp->bytesused, &up->bytesused) ||
-	    put_user(kp->field, &up->field) ||
-	    put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-	    put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
-	    copy_to_user(&up->timecode, &kp->timecode, sizeof(kp->timecode)) ||
-	    put_user(kp->sequence, &up->sequence) ||
-	    put_user(kp->reserved2, &up->reserved2) ||
-	    put_user(kp->reserved, &up->reserved) ||
-	    put_user(kp->length, &up->length))
+	    assign_in_user(&up->index, &kp->index) ||
+	    get_user(type, &kp->type) ||
+	    put_user(type, &up->type) ||
+	    assign_in_user(&up->flags, &kp->flags) ||
+	    get_user(memory, &kp->memory) ||
+	    put_user(memory, &up->memory))
+		return -EFAULT;
+
+	if (assign_in_user(&up->bytesused, &kp->bytesused) ||
+	    assign_in_user(&up->field, &kp->field) ||
+	    assign_in_user(&up->timestamp.tv_sec, &kp->timestamp.tv_sec) ||
+	    assign_in_user(&up->timestamp.tv_usec, &kp->timestamp.tv_usec) ||
+	    copy_in_user(&up->timecode, &kp->timecode, sizeof(kp->timecode)) ||
+	    assign_in_user(&up->sequence, &kp->sequence) ||
+	    assign_in_user(&up->reserved2, &kp->reserved2) ||
+	    assign_in_user(&up->reserved, &kp->reserved) ||
+	    get_user(length, &kp->length) ||
+	    put_user(length, &up->length))
 		return -EFAULT;
 
-	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
-		num_planes = kp->length;
+	if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
+		u32 num_planes = length;
+
 		if (num_planes == 0)
 			return 0;
 
-		uplane = (__force struct v4l2_plane __user *)kp->m.planes;
+		if (get_user(uplane, ((__force struct v4l2_plane __user **)&kp->m.planes)))
+			return -EFAULT;
 		if (get_user(p, &up->m.planes))
 			return -EFAULT;
 		uplane32 = compat_ptr(p);
 
-		while (--num_planes >= 0) {
-			ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
+		while (num_planes--) {
+			ret = put_v4l2_plane32(uplane, uplane32, memory);
 			if (ret)
 				return ret;
 			++uplane;
 			++uplane32;
 		}
 	} else {
-		switch (kp->memory) {
+		switch (memory) {
 		case V4L2_MEMORY_MMAP:
 		case V4L2_MEMORY_OVERLAY:
-			if (put_user(kp->m.offset, &up->m.offset))
+			if (assign_in_user(&up->m.offset, &kp->m.offset))
 				return -EFAULT;
 			break;
 		case V4L2_MEMORY_USERPTR:
-			if (put_user(kp->m.userptr, &up->m.userptr))
+			if (assign_in_user(&up->m.userptr, &kp->m.userptr))
 				return -EFAULT;
 			break;
 		case V4L2_MEMORY_DMABUF:
-			if (put_user(kp->m.fd, &up->m.fd))
+			if (assign_in_user(&up->m.fd, &kp->m.fd))
 				return -EFAULT;
 			break;
 		}
@@ -511,7 +637,7 @@ static int put_v4l2_buffer32(struct v4l2
 struct v4l2_framebuffer32 {
 	__u32			capability;
 	__u32			flags;
-	compat_caddr_t 		base;
+	compat_caddr_t		base;
 	struct {
 		__u32		width;
 		__u32		height;
@@ -524,29 +650,32 @@ struct v4l2_framebuffer32 {
 	} fmt;
 };
 
-static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
+static int get_v4l2_framebuffer32(struct v4l2_framebuffer __user *kp,
+				  struct v4l2_framebuffer32 __user *up)
 {
-	u32 tmp;
+	compat_caddr_t tmp;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(tmp, &up->base) ||
-	    get_user(kp->capability, &up->capability) ||
-	    get_user(kp->flags, &up->flags) ||
-	    copy_from_user(&kp->fmt, &up->fmt, sizeof(up->fmt)))
+	    put_user((__force void *)compat_ptr(tmp), &kp->base) ||
+	    assign_in_user(&kp->capability, &up->capability) ||
+	    assign_in_user(&kp->flags, &up->flags) ||
+	    copy_in_user(&kp->fmt, &up->fmt, sizeof(kp->fmt)))
 		return -EFAULT;
-	kp->base = (__force void *)compat_ptr(tmp);
 	return 0;
 }
 
-static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
+static int put_v4l2_framebuffer32(struct v4l2_framebuffer __user *kp,
+				  struct v4l2_framebuffer32 __user *up)
 {
-	u32 tmp = (u32)((unsigned long)kp->base);
+	void *base;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(tmp, &up->base) ||
-	    put_user(kp->capability, &up->capability) ||
-	    put_user(kp->flags, &up->flags) ||
-	    copy_to_user(&up->fmt, &kp->fmt, sizeof(up->fmt)))
+	    get_user(base, &kp->base) ||
+	    put_user(ptr_to_compat(base), &up->base) ||
+	    assign_in_user(&up->capability, &kp->capability) ||
+	    assign_in_user(&up->flags, &kp->flags) ||
+	    copy_in_user(&up->fmt, &kp->fmt, sizeof(kp->fmt)))
 		return -EFAULT;
 	return 0;
 }
@@ -559,21 +688,26 @@ struct v4l2_input32 {
 	__u32        tuner;             /*  Associated tuner */
 	v4l2_std_id  std;
 	__u32	     status;
-	__u32	     reserved[4];
-} __attribute__ ((packed));
+	__u32	     capabilities;
+	__u32	     reserved[3];
+};
 
-/* The 64-bit v4l2_input struct has extra padding at the end of the struct.
-   Otherwise it is identical to the 32-bit version. */
-static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
+/*
+ * The 64-bit v4l2_input struct has extra padding at the end of the struct.
+ * Otherwise it is identical to the 32-bit version.
+ */
+static inline int get_v4l2_input32(struct v4l2_input __user *kp,
+				   struct v4l2_input32 __user *up)
 {
-	if (copy_from_user(kp, up, sizeof(*up)))
+	if (copy_in_user(kp, up, sizeof(*up)))
 		return -EFAULT;
 	return 0;
 }
 
-static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
+static inline int put_v4l2_input32(struct v4l2_input __user *kp,
+				   struct v4l2_input32 __user *up)
 {
-	if (copy_to_user(up, kp, sizeof(*up)))
+	if (copy_in_user(up, kp, sizeof(*up)))
 		return -EFAULT;
 	return 0;
 }
@@ -627,40 +761,64 @@ static inline bool ctrl_is_pointer(struc
 		(qec.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD);
 }
 
+static int bufsize_v4l2_ext_controls(struct v4l2_ext_controls32 __user *up,
+				     u32 *size)
+{
+	u32 count;
+
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
+	    get_user(count, &up->count))
+		return -EFAULT;
+	if (count > V4L2_CID_MAX_CTRLS)
+		return -EINVAL;
+	*size = count * sizeof(struct v4l2_ext_control);
+	return 0;
+}
+
 static int get_v4l2_ext_controls32(struct file *file,
-				   struct v4l2_ext_controls *kp,
-				   struct v4l2_ext_controls32 __user *up)
+				   struct v4l2_ext_controls __user *kp,
+				   struct v4l2_ext_controls32 __user *up,
+				   void __user *aux_buf, u32 aux_space)
 {
 	struct v4l2_ext_control32 __user *ucontrols;
 	struct v4l2_ext_control __user *kcontrols;
-	int n;
+	u32 count;
+	u32 n;
 	compat_caddr_t p;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    get_user(kp->ctrl_class, &up->ctrl_class) ||
-	    get_user(kp->count, &up->count) ||
-	    get_user(kp->error_idx, &up->error_idx) ||
-	    copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
-		return -EFAULT;
-	n = kp->count;
-	if (n == 0) {
-		kp->controls = NULL;
-		return 0;
-	}
+	    assign_in_user(&kp->ctrl_class, &up->ctrl_class) ||
+	    get_user(count, &up->count) ||
+	    put_user(count, &kp->count) ||
+	    assign_in_user(&kp->error_idx, &up->error_idx) ||
+	    copy_in_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
+		return -EFAULT;
+
+	if (count == 0)
+		return put_user(NULL, &kp->controls);
+	if (count > V4L2_CID_MAX_CTRLS)
+		return -EINVAL;
 	if (get_user(p, &up->controls))
 		return -EFAULT;
 	ucontrols = compat_ptr(p);
-	if (!access_ok(VERIFY_READ, ucontrols, n * sizeof(*ucontrols)))
+	if (!access_ok(VERIFY_READ, ucontrols, count * sizeof(*ucontrols)))
+		return -EFAULT;
+	if (aux_space < count * sizeof(*kcontrols))
 		return -EFAULT;
-	kcontrols = compat_alloc_user_space(n * sizeof(*kcontrols));
-	kp->controls = (__force struct v4l2_ext_control *)kcontrols;
-	while (--n >= 0) {
+	kcontrols = aux_buf;
+	if (put_user((__force struct v4l2_ext_control *)kcontrols,
+		     &kp->controls))
+		return -EFAULT;
+
+	for (n = 0; n < count; n++) {
 		u32 id;
 
 		if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
 			return -EFAULT;
+
 		if (get_user(id, &kcontrols->id))
 			return -EFAULT;
+
 		if (ctrl_is_pointer(file, id)) {
 			void __user *s;
 
@@ -677,43 +835,54 @@ static int get_v4l2_ext_controls32(struc
 }
 
 static int put_v4l2_ext_controls32(struct file *file,
-				   struct v4l2_ext_controls *kp,
+				   struct v4l2_ext_controls __user *kp,
 				   struct v4l2_ext_controls32 __user *up)
 {
 	struct v4l2_ext_control32 __user *ucontrols;
-	struct v4l2_ext_control __user *kcontrols =
-		(__force struct v4l2_ext_control __user *)kp->controls;
-	int n = kp->count;
+	struct v4l2_ext_control __user *kcontrols;
+	u32 count;
+	u32 n;
 	compat_caddr_t p;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->ctrl_class, &up->ctrl_class) ||
-	    put_user(kp->count, &up->count) ||
-	    put_user(kp->error_idx, &up->error_idx) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
+	    assign_in_user(&up->ctrl_class, &kp->ctrl_class) ||
+	    get_user(count, &kp->count) ||
+	    put_user(count, &up->count) ||
+	    assign_in_user(&up->error_idx, &kp->error_idx) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)) ||
+	    get_user(kcontrols, &kp->controls))
 		return -EFAULT;
-	if (!kp->count)
-		return 0;
 
+	if (!count)
+		return 0;
 	if (get_user(p, &up->controls))
 		return -EFAULT;
 	ucontrols = compat_ptr(p);
-	if (!access_ok(VERIFY_WRITE, ucontrols, n * sizeof(*ucontrols)))
+	if (!access_ok(VERIFY_WRITE, ucontrols, count * sizeof(*ucontrols)))
 		return -EFAULT;
 
-	while (--n >= 0) {
-		unsigned size = sizeof(*ucontrols);
+	for (n = 0; n < count; n++) {
+		unsigned int size = sizeof(*ucontrols);
 		u32 id;
 
-		if (get_user(id, &kcontrols->id))
+		if (get_user(id, &kcontrols->id) ||
+		    put_user(id, &ucontrols->id) ||
+		    assign_in_user(&ucontrols->size, &kcontrols->size) ||
+		    copy_in_user(&ucontrols->reserved2, &kcontrols->reserved2,
+				 sizeof(ucontrols->reserved2)))
 			return -EFAULT;
-		/* Do not modify the pointer when copying a pointer control.
-		   The contents of the pointer was changed, not the pointer
-		   itself. */
+
+		/*
+		 * Do not modify the pointer when copying a pointer control.
+		 * The contents of the pointer was changed, not the pointer
+		 * itself.
+		 */
 		if (ctrl_is_pointer(file, id))
 			size -= sizeof(ucontrols->value64);
+
 		if (copy_in_user(ucontrols, kcontrols, size))
 			return -EFAULT;
+
 		ucontrols++;
 		kcontrols++;
 	}
@@ -732,17 +901,18 @@ struct v4l2_event32 {
 	__u32				reserved[8];
 };
 
-static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
+static int put_v4l2_event32(struct v4l2_event __user *kp,
+			    struct v4l2_event32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->type, &up->type) ||
-	    copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
-	    put_user(kp->pending, &up->pending) ||
-	    put_user(kp->sequence, &up->sequence) ||
-	    put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-	    put_user(kp->timestamp.tv_nsec, &up->timestamp.tv_nsec) ||
-	    put_user(kp->id, &up->id) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
+	    assign_in_user(&up->type, &kp->type) ||
+	    copy_in_user(&up->u, &kp->u, sizeof(kp->u)) ||
+	    assign_in_user(&up->pending, &kp->pending) ||
+	    assign_in_user(&up->sequence, &kp->sequence) ||
+	    assign_in_user(&up->timestamp.tv_sec, &kp->timestamp.tv_sec) ||
+	    assign_in_user(&up->timestamp.tv_nsec, &kp->timestamp.tv_nsec) ||
+	    assign_in_user(&up->id, &kp->id) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -755,31 +925,34 @@ struct v4l2_edid32 {
 	compat_caddr_t edid;
 };
 
-static int get_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
+static int get_v4l2_edid32(struct v4l2_edid __user *kp,
+			   struct v4l2_edid32 __user *up)
 {
-	u32 tmp;
+	compat_uptr_t tmp;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    get_user(kp->pad, &up->pad) ||
-	    get_user(kp->start_block, &up->start_block) ||
-	    get_user(kp->blocks, &up->blocks) ||
+	    assign_in_user(&kp->pad, &up->pad) ||
+	    assign_in_user(&kp->start_block, &up->start_block) ||
+	    assign_in_user(&kp->blocks, &up->blocks) ||
 	    get_user(tmp, &up->edid) ||
-	    copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
+	    put_user(compat_ptr(tmp), &kp->edid) ||
+	    copy_in_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
-	kp->edid = (__force u8 *)compat_ptr(tmp);
 	return 0;
 }
 
-static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
+static int put_v4l2_edid32(struct v4l2_edid __user *kp,
+			   struct v4l2_edid32 __user *up)
 {
-	u32 tmp = (u32)((unsigned long)kp->edid);
+	void *edid;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->pad, &up->pad) ||
-	    put_user(kp->start_block, &up->start_block) ||
-	    put_user(kp->blocks, &up->blocks) ||
-	    put_user(tmp, &up->edid) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
+	    assign_in_user(&up->pad, &kp->pad) ||
+	    assign_in_user(&up->start_block, &kp->start_block) ||
+	    assign_in_user(&up->blocks, &kp->blocks) ||
+	    get_user(edid, &kp->edid) ||
+	    put_user(ptr_to_compat(edid), &up->edid) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -796,7 +969,7 @@ static int put_v4l2_edid32(struct v4l2_e
 #define VIDIOC_ENUMINPUT32	_IOWR('V', 26, struct v4l2_input32)
 #define VIDIOC_G_EDID32		_IOWR('V', 40, struct v4l2_edid32)
 #define VIDIOC_S_EDID32		_IOWR('V', 41, struct v4l2_edid32)
-#define VIDIOC_TRY_FMT32      	_IOWR('V', 64, struct v4l2_format32)
+#define VIDIOC_TRY_FMT32	_IOWR('V', 64, struct v4l2_format32)
 #define VIDIOC_G_EXT_CTRLS32    _IOWR('V', 71, struct v4l2_ext_controls32)
 #define VIDIOC_S_EXT_CTRLS32    _IOWR('V', 72, struct v4l2_ext_controls32)
 #define VIDIOC_TRY_EXT_CTRLS32  _IOWR('V', 73, struct v4l2_ext_controls32)
@@ -812,22 +985,23 @@ static int put_v4l2_edid32(struct v4l2_e
 #define VIDIOC_G_OUTPUT32	_IOR ('V', 46, s32)
 #define VIDIOC_S_OUTPUT32	_IOWR('V', 47, s32)
 
+static int alloc_userspace(unsigned int size, u32 aux_space,
+			   void __user **up_native)
+{
+	*up_native = compat_alloc_user_space(size + aux_space);
+	if (!*up_native)
+		return -ENOMEM;
+	if (clear_user(*up_native, size))
+		return -EFAULT;
+	return 0;
+}
+
 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
-	union {
-		struct v4l2_format v2f;
-		struct v4l2_buffer v2b;
-		struct v4l2_framebuffer v2fb;
-		struct v4l2_input v2i;
-		struct v4l2_standard v2s;
-		struct v4l2_ext_controls v2ecs;
-		struct v4l2_event v2ev;
-		struct v4l2_create_buffers v2crt;
-		struct v4l2_edid v2edid;
-		unsigned long vx;
-		int vi;
-	} karg;
 	void __user *up = compat_ptr(arg);
+	void __user *up_native = NULL;
+	void __user *aux_buf;
+	u32 aux_space;
 	int compatible_arg = 1;
 	long err = 0;
 
@@ -866,30 +1040,52 @@ static long do_video_ioctl(struct file *
 	case VIDIOC_STREAMOFF:
 	case VIDIOC_S_INPUT:
 	case VIDIOC_S_OUTPUT:
-		err = get_user(karg.vi, (s32 __user *)up);
+		err = alloc_userspace(sizeof(unsigned int), 0, &up_native);
+		if (!err && assign_in_user((unsigned int __user *)up_native,
+					   (compat_uint_t __user *)up))
+			err = -EFAULT;
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_INPUT:
 	case VIDIOC_G_OUTPUT:
+		err = alloc_userspace(sizeof(unsigned int), 0, &up_native);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_EDID:
 	case VIDIOC_S_EDID:
-		err = get_v4l2_edid32(&karg.v2edid, up);
+		err = alloc_userspace(sizeof(struct v4l2_edid), 0, &up_native);
+		if (!err)
+			err = get_v4l2_edid32(up_native, up);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_FMT:
 	case VIDIOC_S_FMT:
 	case VIDIOC_TRY_FMT:
-		err = get_v4l2_format32(&karg.v2f, up);
+		err = bufsize_v4l2_format(up, &aux_space);
+		if (!err)
+			err = alloc_userspace(sizeof(struct v4l2_format),
+					      aux_space, &up_native);
+		if (!err) {
+			aux_buf = up_native + sizeof(struct v4l2_format);
+			err = get_v4l2_format32(up_native, up,
+						aux_buf, aux_space);
+		}
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_CREATE_BUFS:
-		err = get_v4l2_create32(&karg.v2crt, up);
+		err = bufsize_v4l2_create(up, &aux_space);
+		if (!err)
+			err = alloc_userspace(sizeof(struct v4l2_create_buffers),
+					      aux_space, &up_native);
+		if (!err) {
+			aux_buf = up_native + sizeof(struct v4l2_create_buffers);
+			err = get_v4l2_create32(up_native, up,
+						aux_buf, aux_space);
+		}
 		compatible_arg = 0;
 		break;
 
@@ -897,36 +1093,63 @@ static long do_video_ioctl(struct file *
 	case VIDIOC_QUERYBUF:
 	case VIDIOC_QBUF:
 	case VIDIOC_DQBUF:
-		err = get_v4l2_buffer32(&karg.v2b, up);
+		err = bufsize_v4l2_buffer(up, &aux_space);
+		if (!err)
+			err = alloc_userspace(sizeof(struct v4l2_buffer),
+					      aux_space, &up_native);
+		if (!err) {
+			aux_buf = up_native + sizeof(struct v4l2_buffer);
+			err = get_v4l2_buffer32(up_native, up,
+						aux_buf, aux_space);
+		}
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_S_FBUF:
-		err = get_v4l2_framebuffer32(&karg.v2fb, up);
+		err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0,
+				      &up_native);
+		if (!err)
+			err = get_v4l2_framebuffer32(up_native, up);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_FBUF:
+		err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0,
+				      &up_native);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_ENUMSTD:
-		err = get_v4l2_standard32(&karg.v2s, up);
+		err = alloc_userspace(sizeof(struct v4l2_standard), 0,
+				      &up_native);
+		if (!err)
+			err = get_v4l2_standard32(up_native, up);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_ENUMINPUT:
-		err = get_v4l2_input32(&karg.v2i, up);
+		err = alloc_userspace(sizeof(struct v4l2_input), 0, &up_native);
+		if (!err)
+			err = get_v4l2_input32(up_native, up);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_EXT_CTRLS:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_TRY_EXT_CTRLS:
-		err = get_v4l2_ext_controls32(file, &karg.v2ecs, up);
+		err = bufsize_v4l2_ext_controls(up, &aux_space);
+		if (!err)
+			err = alloc_userspace(sizeof(struct v4l2_ext_controls),
+					      aux_space, &up_native);
+		if (!err) {
+			aux_buf = up_native + sizeof(struct v4l2_ext_controls);
+			err = get_v4l2_ext_controls32(file, up_native, up,
+						      aux_buf, aux_space);
+		}
 		compatible_arg = 0;
 		break;
 	case VIDIOC_DQEVENT:
+		err = alloc_userspace(sizeof(struct v4l2_event), 0, &up_native);
 		compatible_arg = 0;
 		break;
 	}
@@ -935,25 +1158,26 @@ static long do_video_ioctl(struct file *
 
 	if (compatible_arg)
 		err = native_ioctl(file, cmd, (unsigned long)up);
-	else {
-		mm_segment_t old_fs = get_fs();
-
-		set_fs(KERNEL_DS);
-		err = native_ioctl(file, cmd, (unsigned long)&karg);
-		set_fs(old_fs);
-	}
+	else
+		err = native_ioctl(file, cmd, (unsigned long)up_native);
 
 	if (err == -ENOTTY)
 		return err;
 
-	/* Special case: even after an error we need to put the
-	   results back for these ioctls since the error_idx will
-	   contain information on which control failed. */
+	/*
+	 * Special case: even after an error we need to put the
+	 * results back for these ioctls since the error_idx will
+	 * contain information on which control failed.
+	 */
 	switch (cmd) {
 	case VIDIOC_G_EXT_CTRLS:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_TRY_EXT_CTRLS:
-		if (put_v4l2_ext_controls32(file, &karg.v2ecs, up))
+		if (put_v4l2_ext_controls32(file, up_native, up))
+			err = -EFAULT;
+		break;
+	case VIDIOC_S_EDID:
+		if (put_v4l2_edid32(up_native, up))
 			err = -EFAULT;
 		break;
 	}
@@ -965,45 +1189,46 @@ static long do_video_ioctl(struct file *
 	case VIDIOC_S_OUTPUT:
 	case VIDIOC_G_INPUT:
 	case VIDIOC_G_OUTPUT:
-		err = put_user(((s32)karg.vi), (s32 __user *)up);
+		if (assign_in_user((compat_uint_t __user *)up,
+				   ((unsigned int __user *)up_native)))
+			err = -EFAULT;
 		break;
 
 	case VIDIOC_G_FBUF:
-		err = put_v4l2_framebuffer32(&karg.v2fb, up);
+		err = put_v4l2_framebuffer32(up_native, up);
 		break;
 
 	case VIDIOC_DQEVENT:
-		err = put_v4l2_event32(&karg.v2ev, up);
+		err = put_v4l2_event32(up_native, up);
 		break;
 
 	case VIDIOC_G_EDID:
-	case VIDIOC_S_EDID:
-		err = put_v4l2_edid32(&karg.v2edid, up);
+		err = put_v4l2_edid32(up_native, up);
 		break;
 
 	case VIDIOC_G_FMT:
 	case VIDIOC_S_FMT:
 	case VIDIOC_TRY_FMT:
-		err = put_v4l2_format32(&karg.v2f, up);
+		err = put_v4l2_format32(up_native, up);
 		break;
 
 	case VIDIOC_CREATE_BUFS:
-		err = put_v4l2_create32(&karg.v2crt, up);
+		err = put_v4l2_create32(up_native, up);
 		break;
 
 	case VIDIOC_PREPARE_BUF:
 	case VIDIOC_QUERYBUF:
 	case VIDIOC_QBUF:
 	case VIDIOC_DQBUF:
-		err = put_v4l2_buffer32(&karg.v2b, up);
+		err = put_v4l2_buffer32(up_native, up);
 		break;
 
 	case VIDIOC_ENUMSTD:
-		err = put_v4l2_standard32(&karg.v2s, up);
+		err = put_v4l2_standard32(up_native, up);
 		break;
 
 	case VIDIOC_ENUMINPUT:
-		err = put_v4l2_input32(&karg.v2i, up);
+		err = put_v4l2_input32(up_native, up);
 		break;
 	}
 	return err;


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

Patch "media: v4l2-compat-ioctl32.c: refactor compat ioctl32 logic" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32.c: refactor compat ioctl32 logic

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:33 -0300
Subject: media: v4l2-compat-ioctl32.c: refactor compat ioctl32 logic
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Daniel Mentz <danielmentz@google.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@s-opensource.com>, Sasha Levin <alexander.levin@microsoft.com>
Message-ID: <10af8cdf1226db8dfc7e85673ee3a7a17ba969f2.1522260310.git.mchehab@s-opensource.com>

From: Daniel Mentz <danielmentz@google.com>

commit a1dfb4c48cc1e64eeb7800a27c66a6f7e88d075a upstream.

The 32-bit compat v4l2 ioctl handling is implemented based on its 64-bit
equivalent. It converts 32-bit data structures into its 64-bit
equivalents and needs to provide the data to the 64-bit ioctl in user
space memory which is commonly allocated using
compat_alloc_user_space().

However, due to how that function is implemented, it can only be called
a single time for every syscall invocation.

Supposedly to avoid this limitation, the existing code uses a mix of
memory from the kernel stack and memory allocated through
compat_alloc_user_space().

Under normal circumstances, this would not work, because the 64-bit
ioctl expects all pointers to point to user space memory. As a
workaround, set_fs(KERNEL_DS) is called to temporarily disable this
extra safety check and allow kernel pointers. However, this might
introduce a security vulnerability: The result of the 32-bit to 64-bit
conversion is writeable by user space because the output buffer has been
allocated via compat_alloc_user_space(). A malicious user space process
could then manipulate pointers inside this output buffer, and due to the
previous set_fs(KERNEL_DS) call, functions like get_user() or put_user()
no longer prevent kernel memory access.

The new approach is to pre-calculate the total amount of user space
memory that is needed, allocate it using compat_alloc_user_space() and
then divide up the allocated memory to accommodate all data structures
that need to be converted.

An alternative approach would have been to retain the union type karg
that they allocated on the kernel stack in do_video_ioctl(), copy all
data from user space into karg and then back to user space. However, we
decided against this approach because it does not align with other
compat syscall implementations. Instead, we tried to replicate the
get_user/put_user pairs as found in other places in the kernel:

    if (get_user(clipcount, &up->clipcount) ||
        put_user(clipcount, &kp->clipcount)) return -EFAULT;

Notes from hans.verkuil@cisco.com:

This patch was taken from:
    https://github.com/LineageOS/android_kernel_samsung_apq8084/commit/97b733953c06e4f0398ade18850f0817778255f7

Clearly nobody could be bothered to upstream this patch or at minimum
tell us :-( We only heard about this a week ago.

This patch was rebased and cleaned up. Compared to the original I
also swapped the order of the convert_in_user arguments so that they
matched copy_in_user. It was hard to review otherwise. I also replaced
the ALLOC_USER_SPACE/ALLOC_AND_GET by a normal function.

Fixes: 6b5a9492ca ("v4l: introduce string control support.")

Signed-off-by: Daniel Mentz <danielmentz@google.com>
Co-developed-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |  757 ++++++++++++++++----------
 1 file changed, 491 insertions(+), 266 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -22,6 +22,14 @@
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-ioctl.h>
 
+/* Use the same argument order as copy_in_user */
+#define assign_in_user(to, from)					\
+({									\
+	typeof(*from) __assign_tmp;					\
+									\
+	get_user(__assign_tmp, from) || put_user(__assign_tmp, to);	\
+})
+
 static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	long ret = -ENOIOCTLCMD;
@@ -35,12 +43,12 @@ static long native_ioctl(struct file *fi
 
 struct v4l2_clip32 {
 	struct v4l2_rect        c;
-	compat_caddr_t 		next;
+	compat_caddr_t		next;
 };
 
 struct v4l2_window32 {
 	struct v4l2_rect        w;
-	__u32		  	field;	/* enum v4l2_field */
+	__u32			field;	/* enum v4l2_field */
 	__u32			chromakey;
 	compat_caddr_t		clips; /* actually struct v4l2_clip32 * */
 	__u32			clipcount;
@@ -48,37 +56,41 @@ struct v4l2_window32 {
 	__u8                    global_alpha;
 };
 
-static int get_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
+static int get_v4l2_window32(struct v4l2_window __user *kp,
+			     struct v4l2_window32 __user *up,
+			     void __user *aux_buf, u32 aux_space)
 {
 	struct v4l2_clip32 __user *uclips;
 	struct v4l2_clip __user *kclips;
 	compat_caddr_t p;
-	u32 n;
+	u32 clipcount;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    copy_from_user(&kp->w, &up->w, sizeof(up->w)) ||
-	    get_user(kp->field, &up->field) ||
-	    get_user(kp->chromakey, &up->chromakey) ||
-	    get_user(kp->clipcount, &up->clipcount) ||
-	    get_user(kp->global_alpha, &up->global_alpha))
+	    copy_in_user(&kp->w, &up->w, sizeof(up->w)) ||
+	    assign_in_user(&kp->field, &up->field) ||
+	    assign_in_user(&kp->chromakey, &up->chromakey) ||
+	    assign_in_user(&kp->global_alpha, &up->global_alpha) ||
+	    get_user(clipcount, &up->clipcount) ||
+	    put_user(clipcount, &kp->clipcount))
 		return -EFAULT;
-	if (kp->clipcount > 2048)
+	if (clipcount > 2048)
 		return -EINVAL;
-	if (!kp->clipcount) {
-		kp->clips = NULL;
-		return 0;
-	}
+	if (!clipcount)
+		return put_user(NULL, &kp->clips);
 
-	n = kp->clipcount;
 	if (get_user(p, &up->clips))
 		return -EFAULT;
 	uclips = compat_ptr(p);
-	kclips = compat_alloc_user_space(n * sizeof(*kclips));
-	kp->clips = kclips;
-	while (n--) {
+	if (aux_space < clipcount * sizeof(*kclips))
+		return -EFAULT;
+	kclips = aux_buf;
+	if (put_user(kclips, &kp->clips))
+		return -EFAULT;
+
+	while (clipcount--) {
 		if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c)))
 			return -EFAULT;
-		if (put_user(n ? kclips + 1 : NULL, &kclips->next))
+		if (put_user(clipcount ? kclips + 1 : NULL, &kclips->next))
 			return -EFAULT;
 		uclips++;
 		kclips++;
@@ -86,27 +98,28 @@ static int get_v4l2_window32(struct v4l2
 	return 0;
 }
 
-static int put_v4l2_window32(struct v4l2_window *kp, struct v4l2_window32 __user *up)
+static int put_v4l2_window32(struct v4l2_window __user *kp,
+			     struct v4l2_window32 __user *up)
 {
 	struct v4l2_clip __user *kclips = kp->clips;
 	struct v4l2_clip32 __user *uclips;
-	u32 n = kp->clipcount;
 	compat_caddr_t p;
+	u32 clipcount;
 
-	if (copy_to_user(&up->w, &kp->w, sizeof(kp->w)) ||
-	    put_user(kp->field, &up->field) ||
-	    put_user(kp->chromakey, &up->chromakey) ||
-	    put_user(kp->clipcount, &up->clipcount) ||
-	    put_user(kp->global_alpha, &up->global_alpha))
+	if (copy_in_user(&up->w, &kp->w, sizeof(kp->w)) ||
+	    assign_in_user(&up->field, &kp->field) ||
+	    assign_in_user(&up->chromakey, &kp->chromakey) ||
+	    assign_in_user(&up->global_alpha, &kp->global_alpha) ||
+	    get_user(clipcount, &kp->clipcount) ||
+	    put_user(clipcount, &up->clipcount))
 		return -EFAULT;
-
-	if (!kp->clipcount)
+	if (!clipcount)
 		return 0;
 
 	if (get_user(p, &up->clips))
 		return -EFAULT;
 	uclips = compat_ptr(p);
-	while (n--) {
+	while (clipcount--) {
 		if (copy_in_user(&uclips->c, &kclips->c, sizeof(uclips->c)))
 			return -EFAULT;
 		uclips++;
@@ -144,90 +157,150 @@ struct v4l2_create_buffers32 {
 	__u32			reserved[8];
 };
 
-static int __get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
+static int __bufsize_v4l2_format(struct v4l2_format32 __user *up, u32 *size)
+{
+	u32 type;
+
+	if (get_user(type, &up->type))
+		return -EFAULT;
+
+	switch (type) {
+	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
+		u32 clipcount;
+
+		if (get_user(clipcount, &up->fmt.win.clipcount))
+			return -EFAULT;
+		if (clipcount > 2048)
+			return -EINVAL;
+		*size = clipcount * sizeof(struct v4l2_clip);
+		return 0;
+	}
+	default:
+		*size = 0;
+		return 0;
+	}
+}
+
+static int bufsize_v4l2_format(struct v4l2_format32 __user *up, u32 *size)
 {
-	if (get_user(kp->type, &up->type))
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 		return -EFAULT;
+	return __bufsize_v4l2_format(up, size);
+}
 
-	switch (kp->type) {
+static int __get_v4l2_format32(struct v4l2_format __user *kp,
+			       struct v4l2_format32 __user *up,
+			       void __user *aux_buf, u32 aux_space)
+{
+	u32 type;
+
+	if (get_user(type, &up->type) || put_user(type, &kp->type))
+		return -EFAULT;
+
+	switch (type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-		return copy_from_user(&kp->fmt.pix, &up->fmt.pix,
-				      sizeof(kp->fmt.pix)) ? -EFAULT : 0;
+		return copy_in_user(&kp->fmt.pix, &up->fmt.pix,
+				    sizeof(kp->fmt.pix)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-		return copy_from_user(&kp->fmt.pix_mp, &up->fmt.pix_mp,
-				      sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
+		return copy_in_user(&kp->fmt.pix_mp, &up->fmt.pix_mp,
+				    sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
-		return get_v4l2_window32(&kp->fmt.win, &up->fmt.win);
+		return get_v4l2_window32(&kp->fmt.win, &up->fmt.win,
+					 aux_buf, aux_space);
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_VBI_OUTPUT:
-		return copy_from_user(&kp->fmt.vbi, &up->fmt.vbi,
-				      sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
+		return copy_in_user(&kp->fmt.vbi, &up->fmt.vbi,
+				    sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
-		return copy_from_user(&kp->fmt.sliced, &up->fmt.sliced,
-				      sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
+		return copy_in_user(&kp->fmt.sliced, &up->fmt.sliced,
+				    sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 	default:
 		return -EINVAL;
 	}
 }
 
-static int get_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
+static int get_v4l2_format32(struct v4l2_format __user *kp,
+			     struct v4l2_format32 __user *up,
+			     void __user *aux_buf, u32 aux_space)
 {
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
 		return -EFAULT;
-	return __get_v4l2_format32(kp, up);
+	return __get_v4l2_format32(kp, up, aux_buf, aux_space);
 }
 
-static int get_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
+static int bufsize_v4l2_create(struct v4l2_create_buffers32 __user *up,
+			       u32 *size)
+{
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
+		return -EFAULT;
+	return __bufsize_v4l2_format(&up->format, size);
+}
+
+static int get_v4l2_create32(struct v4l2_create_buffers __user *kp,
+			     struct v4l2_create_buffers32 __user *up,
+			     void __user *aux_buf, u32 aux_space)
 {
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    copy_from_user(kp, up, offsetof(struct v4l2_create_buffers32, format)))
+	    copy_in_user(kp, up,
+			 offsetof(struct v4l2_create_buffers32, format)))
 		return -EFAULT;
-	return __get_v4l2_format32(&kp->format, &up->format);
+	return __get_v4l2_format32(&kp->format, &up->format,
+				   aux_buf, aux_space);
 }
 
-static int __put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
+static int __put_v4l2_format32(struct v4l2_format __user *kp,
+			       struct v4l2_format32 __user *up)
 {
-	switch (kp->type) {
+	u32 type;
+
+	if (get_user(type, &kp->type))
+		return -EFAULT;
+
+	switch (type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
-		return copy_to_user(&up->fmt.pix, &kp->fmt.pix,
-				    sizeof(kp->fmt.pix)) ?  -EFAULT : 0;
+		return copy_in_user(&up->fmt.pix, &kp->fmt.pix,
+				    sizeof(kp->fmt.pix)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
-		return copy_to_user(&up->fmt.pix_mp, &kp->fmt.pix_mp,
-				    sizeof(kp->fmt.pix_mp)) ?  -EFAULT : 0;
+		return copy_in_user(&up->fmt.pix_mp, &kp->fmt.pix_mp,
+				    sizeof(kp->fmt.pix_mp)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 		return put_v4l2_window32(&kp->fmt.win, &up->fmt.win);
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_VBI_OUTPUT:
-		return copy_to_user(&up->fmt.vbi, &kp->fmt.vbi,
-				    sizeof(kp->fmt.vbi)) ?  -EFAULT : 0;
+		return copy_in_user(&up->fmt.vbi, &kp->fmt.vbi,
+				    sizeof(kp->fmt.vbi)) ? -EFAULT : 0;
 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
-		return copy_to_user(&up->fmt.sliced, &kp->fmt.sliced,
-				    sizeof(kp->fmt.sliced)) ?  -EFAULT : 0;
+		return copy_in_user(&up->fmt.sliced, &kp->fmt.sliced,
+				    sizeof(kp->fmt.sliced)) ? -EFAULT : 0;
 	default:
 		return -EINVAL;
 	}
 }
 
-static int put_v4l2_format32(struct v4l2_format *kp, struct v4l2_format32 __user *up)
+static int put_v4l2_format32(struct v4l2_format __user *kp,
+			     struct v4l2_format32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
 		return -EFAULT;
 	return __put_v4l2_format32(kp, up);
 }
 
-static int put_v4l2_create32(struct v4l2_create_buffers *kp, struct v4l2_create_buffers32 __user *up)
+static int put_v4l2_create32(struct v4l2_create_buffers __user *kp,
+			     struct v4l2_create_buffers32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    copy_to_user(up, kp, offsetof(struct v4l2_create_buffers32, format)) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
+	    copy_in_user(up, kp,
+			 offsetof(struct v4l2_create_buffers32, format)) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
 	return __put_v4l2_format32(&kp->format, &up->format);
 }
@@ -241,24 +314,27 @@ struct v4l2_standard32 {
 	__u32		     reserved[4];
 };
 
-static int get_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
+static int get_v4l2_standard32(struct v4l2_standard __user *kp,
+			       struct v4l2_standard32 __user *up)
 {
 	/* other fields are not set by the user, nor used by the driver */
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    get_user(kp->index, &up->index))
+	    assign_in_user(&kp->index, &up->index))
 		return -EFAULT;
 	return 0;
 }
 
-static int put_v4l2_standard32(struct v4l2_standard *kp, struct v4l2_standard32 __user *up)
+static int put_v4l2_standard32(struct v4l2_standard __user *kp,
+			       struct v4l2_standard32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->index, &up->index) ||
-	    copy_to_user(up->id, &kp->id, sizeof(__u64)) ||
-	    copy_to_user(up->name, kp->name, sizeof(up->name)) ||
-	    copy_to_user(&up->frameperiod, &kp->frameperiod, sizeof(kp->frameperiod)) ||
-	    put_user(kp->framelines, &up->framelines) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
+	    assign_in_user(&up->index, &kp->index) ||
+	    copy_in_user(&up->id, &kp->id, sizeof(up->id)) ||
+	    copy_in_user(up->name, kp->name, sizeof(up->name)) ||
+	    copy_in_user(&up->frameperiod, &kp->frameperiod,
+			 sizeof(up->frameperiod)) ||
+	    assign_in_user(&up->framelines, &kp->framelines) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -298,11 +374,11 @@ struct v4l2_buffer32 {
 	__u32			reserved;
 };
 
-static int get_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
+static int get_v4l2_plane32(struct v4l2_plane __user *up,
+			    struct v4l2_plane32 __user *up32,
 			    enum v4l2_memory memory)
 {
-	void __user *up_pln;
-	compat_long_t p;
+	compat_ulong_t p;
 
 	if (copy_in_user(up, up32, 2 * sizeof(__u32)) ||
 	    copy_in_user(&up->data_offset, &up32->data_offset,
@@ -317,10 +393,8 @@ static int get_v4l2_plane32(struct v4l2_
 			return -EFAULT;
 		break;
 	case V4L2_MEMORY_USERPTR:
-		if (get_user(p, &up32->m.userptr))
-			return -EFAULT;
-		up_pln = compat_ptr(p);
-		if (put_user((unsigned long)up_pln, &up->m.userptr))
+		if (get_user(p, &up32->m.userptr) ||
+		    put_user((unsigned long)compat_ptr(p), &up->m.userptr))
 			return -EFAULT;
 		break;
 	case V4L2_MEMORY_DMABUF:
@@ -332,7 +406,8 @@ static int get_v4l2_plane32(struct v4l2_
 	return 0;
 }
 
-static int put_v4l2_plane32(struct v4l2_plane __user *up, struct v4l2_plane32 __user *up32,
+static int put_v4l2_plane32(struct v4l2_plane __user *up,
+			    struct v4l2_plane32 __user *up32,
 			    enum v4l2_memory memory)
 {
 	unsigned long p;
@@ -356,8 +431,7 @@ static int put_v4l2_plane32(struct v4l2_
 			return -EFAULT;
 		break;
 	case V4L2_MEMORY_DMABUF:
-		if (copy_in_user(&up32->m.fd, &up->m.fd,
-				 sizeof(up->m.fd)))
+		if (copy_in_user(&up32->m.fd, &up->m.fd, sizeof(up->m.fd)))
 			return -EFAULT;
 		break;
 	}
@@ -365,37 +439,75 @@ static int put_v4l2_plane32(struct v4l2_
 	return 0;
 }
 
-static int get_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
+static int bufsize_v4l2_buffer(struct v4l2_buffer32 __user *up, u32 *size)
 {
+	u32 type;
+	u32 length;
+
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
+	    get_user(type, &up->type) ||
+	    get_user(length, &up->length))
+		return -EFAULT;
+
+	if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
+		if (length > VIDEO_MAX_PLANES)
+			return -EINVAL;
+
+		/*
+		 * We don't really care if userspace decides to kill itself
+		 * by passing a very big length value
+		 */
+		*size = length * sizeof(struct v4l2_plane);
+	} else {
+		*size = 0;
+	}
+	return 0;
+}
+
+static int get_v4l2_buffer32(struct v4l2_buffer __user *kp,
+			     struct v4l2_buffer32 __user *up,
+			     void __user *aux_buf, u32 aux_space)
+{
+	u32 type;
+	u32 length;
+	enum v4l2_memory memory;
 	struct v4l2_plane32 __user *uplane32;
 	struct v4l2_plane __user *uplane;
 	compat_caddr_t p;
-	int num_planes;
 	int ret;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    get_user(kp->index, &up->index) ||
-	    get_user(kp->type, &up->type) ||
-	    get_user(kp->flags, &up->flags) ||
-	    get_user(kp->memory, &up->memory) ||
-	    get_user(kp->length, &up->length))
-		return -EFAULT;
-
-	if (V4L2_TYPE_IS_OUTPUT(kp->type))
-		if (get_user(kp->bytesused, &up->bytesused) ||
-		    get_user(kp->field, &up->field) ||
-		    get_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-		    get_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec))
+	    assign_in_user(&kp->index, &up->index) ||
+	    get_user(type, &up->type) ||
+	    put_user(type, &kp->type) ||
+	    assign_in_user(&kp->flags, &up->flags) ||
+	    get_user(memory, &up->memory) ||
+	    put_user(memory, &kp->memory) ||
+	    get_user(length, &up->length) ||
+	    put_user(length, &kp->length))
+		return -EFAULT;
+
+	if (V4L2_TYPE_IS_OUTPUT(type))
+		if (assign_in_user(&kp->bytesused, &up->bytesused) ||
+		    assign_in_user(&kp->field, &up->field) ||
+		    assign_in_user(&kp->timestamp.tv_sec,
+				   &up->timestamp.tv_sec) ||
+		    assign_in_user(&kp->timestamp.tv_usec,
+				   &up->timestamp.tv_usec))
 			return -EFAULT;
 
-	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
-		num_planes = kp->length;
+	if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
+		u32 num_planes = length;
+
 		if (num_planes == 0) {
-			kp->m.planes = NULL;
-			/* num_planes == 0 is legal, e.g. when userspace doesn't
-			 * need planes array on DQBUF*/
-			return 0;
+			/*
+			 * num_planes == 0 is legal, e.g. when userspace doesn't
+			 * need planes array on DQBUF
+			 */
+			return put_user(NULL, &kp->m.planes);
 		}
+		if (num_planes > VIDEO_MAX_PLANES)
+			return -EINVAL;
 
 		if (get_user(p, &up->m.planes))
 			return -EFAULT;
@@ -405,37 +517,43 @@ static int get_v4l2_buffer32(struct v4l2
 			       num_planes * sizeof(*uplane32)))
 			return -EFAULT;
 
-		/* We don't really care if userspace decides to kill itself
-		 * by passing a very big num_planes value */
-		uplane = compat_alloc_user_space(num_planes * sizeof(*uplane));
-		kp->m.planes = (__force struct v4l2_plane *)uplane;
+		/*
+		 * We don't really care if userspace decides to kill itself
+		 * by passing a very big num_planes value
+		 */
+		if (aux_space < num_planes * sizeof(*uplane))
+			return -EFAULT;
+
+		uplane = aux_buf;
+		if (put_user((__force struct v4l2_plane *)uplane,
+			     &kp->m.planes))
+			return -EFAULT;
 
-		while (--num_planes >= 0) {
-			ret = get_v4l2_plane32(uplane, uplane32, kp->memory);
+		while (num_planes--) {
+			ret = get_v4l2_plane32(uplane, uplane32, memory);
 			if (ret)
 				return ret;
-			++uplane;
-			++uplane32;
+			uplane++;
+			uplane32++;
 		}
 	} else {
-		switch (kp->memory) {
+		switch (memory) {
 		case V4L2_MEMORY_MMAP:
 		case V4L2_MEMORY_OVERLAY:
-			if (get_user(kp->m.offset, &up->m.offset))
+			if (assign_in_user(&kp->m.offset, &up->m.offset))
 				return -EFAULT;
 			break;
-		case V4L2_MEMORY_USERPTR:
-			{
-				compat_long_t tmp;
+		case V4L2_MEMORY_USERPTR: {
+			compat_ulong_t userptr;
 
-				if (get_user(tmp, &up->m.userptr))
-					return -EFAULT;
-
-				kp->m.userptr = (unsigned long)compat_ptr(tmp);
-			}
+			if (get_user(userptr, &up->m.userptr) ||
+			    put_user((unsigned long)compat_ptr(userptr),
+				     &kp->m.userptr))
+				return -EFAULT;
 			break;
+		}
 		case V4L2_MEMORY_DMABUF:
-			if (get_user(kp->m.fd, &up->m.fd))
+			if (assign_in_user(&kp->m.fd, &up->m.fd))
 				return -EFAULT;
 			break;
 		}
@@ -444,62 +562,70 @@ static int get_v4l2_buffer32(struct v4l2
 	return 0;
 }
 
-static int put_v4l2_buffer32(struct v4l2_buffer *kp, struct v4l2_buffer32 __user *up)
+static int put_v4l2_buffer32(struct v4l2_buffer __user *kp,
+			     struct v4l2_buffer32 __user *up)
 {
+	u32 type;
+	u32 length;
+	enum v4l2_memory memory;
 	struct v4l2_plane32 __user *uplane32;
 	struct v4l2_plane __user *uplane;
 	compat_caddr_t p;
-	int num_planes;
 	int ret;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->index, &up->index) ||
-	    put_user(kp->type, &up->type) ||
-	    put_user(kp->flags, &up->flags) ||
-	    put_user(kp->memory, &up->memory))
-		return -EFAULT;
-
-	if (put_user(kp->bytesused, &up->bytesused) ||
-	    put_user(kp->field, &up->field) ||
-	    put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-	    put_user(kp->timestamp.tv_usec, &up->timestamp.tv_usec) ||
-	    copy_to_user(&up->timecode, &kp->timecode, sizeof(kp->timecode)) ||
-	    put_user(kp->sequence, &up->sequence) ||
-	    put_user(kp->reserved2, &up->reserved2) ||
-	    put_user(kp->reserved, &up->reserved) ||
-	    put_user(kp->length, &up->length))
+	    assign_in_user(&up->index, &kp->index) ||
+	    get_user(type, &kp->type) ||
+	    put_user(type, &up->type) ||
+	    assign_in_user(&up->flags, &kp->flags) ||
+	    get_user(memory, &kp->memory) ||
+	    put_user(memory, &up->memory))
+		return -EFAULT;
+
+	if (assign_in_user(&up->bytesused, &kp->bytesused) ||
+	    assign_in_user(&up->field, &kp->field) ||
+	    assign_in_user(&up->timestamp.tv_sec, &kp->timestamp.tv_sec) ||
+	    assign_in_user(&up->timestamp.tv_usec, &kp->timestamp.tv_usec) ||
+	    copy_in_user(&up->timecode, &kp->timecode, sizeof(kp->timecode)) ||
+	    assign_in_user(&up->sequence, &kp->sequence) ||
+	    assign_in_user(&up->reserved2, &kp->reserved2) ||
+	    assign_in_user(&up->reserved, &kp->reserved) ||
+	    get_user(length, &kp->length) ||
+	    put_user(length, &up->length))
 		return -EFAULT;
 
-	if (V4L2_TYPE_IS_MULTIPLANAR(kp->type)) {
-		num_planes = kp->length;
+	if (V4L2_TYPE_IS_MULTIPLANAR(type)) {
+		u32 num_planes = length;
+
 		if (num_planes == 0)
 			return 0;
 
-		uplane = (__force struct v4l2_plane __user *)kp->m.planes;
+		if (get_user(uplane, ((__force struct v4l2_plane __user **)&kp->m.planes)))
+			return -EFAULT;
 		if (get_user(p, &up->m.planes))
 			return -EFAULT;
 		uplane32 = compat_ptr(p);
 
-		while (--num_planes >= 0) {
-			ret = put_v4l2_plane32(uplane, uplane32, kp->memory);
+		while (num_planes--) {
+			ret = put_v4l2_plane32(uplane, uplane32, memory);
 			if (ret)
 				return ret;
 			++uplane;
 			++uplane32;
 		}
 	} else {
-		switch (kp->memory) {
+		switch (memory) {
 		case V4L2_MEMORY_MMAP:
 		case V4L2_MEMORY_OVERLAY:
-			if (put_user(kp->m.offset, &up->m.offset))
+			if (assign_in_user(&up->m.offset, &kp->m.offset))
 				return -EFAULT;
 			break;
 		case V4L2_MEMORY_USERPTR:
-			if (put_user(kp->m.userptr, &up->m.userptr))
+			if (assign_in_user(&up->m.userptr, &kp->m.userptr))
 				return -EFAULT;
 			break;
 		case V4L2_MEMORY_DMABUF:
-			if (put_user(kp->m.fd, &up->m.fd))
+			if (assign_in_user(&up->m.fd, &kp->m.fd))
 				return -EFAULT;
 			break;
 		}
@@ -511,7 +637,7 @@ static int put_v4l2_buffer32(struct v4l2
 struct v4l2_framebuffer32 {
 	__u32			capability;
 	__u32			flags;
-	compat_caddr_t 		base;
+	compat_caddr_t		base;
 	struct {
 		__u32		width;
 		__u32		height;
@@ -524,29 +650,32 @@ struct v4l2_framebuffer32 {
 	} fmt;
 };
 
-static int get_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
+static int get_v4l2_framebuffer32(struct v4l2_framebuffer __user *kp,
+				  struct v4l2_framebuffer32 __user *up)
 {
-	u32 tmp;
+	compat_caddr_t tmp;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    get_user(tmp, &up->base) ||
-	    get_user(kp->capability, &up->capability) ||
-	    get_user(kp->flags, &up->flags) ||
-	    copy_from_user(&kp->fmt, &up->fmt, sizeof(up->fmt)))
+	    put_user((__force void *)compat_ptr(tmp), &kp->base) ||
+	    assign_in_user(&kp->capability, &up->capability) ||
+	    assign_in_user(&kp->flags, &up->flags) ||
+	    copy_in_user(&kp->fmt, &up->fmt, sizeof(kp->fmt)))
 		return -EFAULT;
-	kp->base = (__force void *)compat_ptr(tmp);
 	return 0;
 }
 
-static int put_v4l2_framebuffer32(struct v4l2_framebuffer *kp, struct v4l2_framebuffer32 __user *up)
+static int put_v4l2_framebuffer32(struct v4l2_framebuffer __user *kp,
+				  struct v4l2_framebuffer32 __user *up)
 {
-	u32 tmp = (u32)((unsigned long)kp->base);
+	void *base;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(tmp, &up->base) ||
-	    put_user(kp->capability, &up->capability) ||
-	    put_user(kp->flags, &up->flags) ||
-	    copy_to_user(&up->fmt, &kp->fmt, sizeof(up->fmt)))
+	    get_user(base, &kp->base) ||
+	    put_user(ptr_to_compat(base), &up->base) ||
+	    assign_in_user(&up->capability, &kp->capability) ||
+	    assign_in_user(&up->flags, &kp->flags) ||
+	    copy_in_user(&up->fmt, &kp->fmt, sizeof(kp->fmt)))
 		return -EFAULT;
 	return 0;
 }
@@ -559,21 +688,26 @@ struct v4l2_input32 {
 	__u32        tuner;             /*  Associated tuner */
 	v4l2_std_id  std;
 	__u32	     status;
-	__u32	     reserved[4];
-} __attribute__ ((packed));
+	__u32	     capabilities;
+	__u32	     reserved[3];
+};
 
-/* The 64-bit v4l2_input struct has extra padding at the end of the struct.
-   Otherwise it is identical to the 32-bit version. */
-static inline int get_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
+/*
+ * The 64-bit v4l2_input struct has extra padding at the end of the struct.
+ * Otherwise it is identical to the 32-bit version.
+ */
+static inline int get_v4l2_input32(struct v4l2_input __user *kp,
+				   struct v4l2_input32 __user *up)
 {
-	if (copy_from_user(kp, up, sizeof(*up)))
+	if (copy_in_user(kp, up, sizeof(*up)))
 		return -EFAULT;
 	return 0;
 }
 
-static inline int put_v4l2_input32(struct v4l2_input *kp, struct v4l2_input32 __user *up)
+static inline int put_v4l2_input32(struct v4l2_input __user *kp,
+				   struct v4l2_input32 __user *up)
 {
-	if (copy_to_user(up, kp, sizeof(*up)))
+	if (copy_in_user(up, kp, sizeof(*up)))
 		return -EFAULT;
 	return 0;
 }
@@ -627,40 +761,64 @@ static inline bool ctrl_is_pointer(struc
 		(qec.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD);
 }
 
+static int bufsize_v4l2_ext_controls(struct v4l2_ext_controls32 __user *up,
+				     u32 *size)
+{
+	u32 count;
+
+	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
+	    get_user(count, &up->count))
+		return -EFAULT;
+	if (count > V4L2_CID_MAX_CTRLS)
+		return -EINVAL;
+	*size = count * sizeof(struct v4l2_ext_control);
+	return 0;
+}
+
 static int get_v4l2_ext_controls32(struct file *file,
-				   struct v4l2_ext_controls *kp,
-				   struct v4l2_ext_controls32 __user *up)
+				   struct v4l2_ext_controls __user *kp,
+				   struct v4l2_ext_controls32 __user *up,
+				   void __user *aux_buf, u32 aux_space)
 {
 	struct v4l2_ext_control32 __user *ucontrols;
 	struct v4l2_ext_control __user *kcontrols;
-	int n;
+	u32 count;
+	u32 n;
 	compat_caddr_t p;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    get_user(kp->ctrl_class, &up->ctrl_class) ||
-	    get_user(kp->count, &up->count) ||
-	    get_user(kp->error_idx, &up->error_idx) ||
-	    copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
-		return -EFAULT;
-	n = kp->count;
-	if (n == 0) {
-		kp->controls = NULL;
-		return 0;
-	}
+	    assign_in_user(&kp->ctrl_class, &up->ctrl_class) ||
+	    get_user(count, &up->count) ||
+	    put_user(count, &kp->count) ||
+	    assign_in_user(&kp->error_idx, &up->error_idx) ||
+	    copy_in_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
+		return -EFAULT;
+
+	if (count == 0)
+		return put_user(NULL, &kp->controls);
+	if (count > V4L2_CID_MAX_CTRLS)
+		return -EINVAL;
 	if (get_user(p, &up->controls))
 		return -EFAULT;
 	ucontrols = compat_ptr(p);
-	if (!access_ok(VERIFY_READ, ucontrols, n * sizeof(*ucontrols)))
+	if (!access_ok(VERIFY_READ, ucontrols, count * sizeof(*ucontrols)))
+		return -EFAULT;
+	if (aux_space < count * sizeof(*kcontrols))
 		return -EFAULT;
-	kcontrols = compat_alloc_user_space(n * sizeof(*kcontrols));
-	kp->controls = (__force struct v4l2_ext_control *)kcontrols;
-	while (--n >= 0) {
+	kcontrols = aux_buf;
+	if (put_user((__force struct v4l2_ext_control *)kcontrols,
+		     &kp->controls))
+		return -EFAULT;
+
+	for (n = 0; n < count; n++) {
 		u32 id;
 
 		if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols)))
 			return -EFAULT;
+
 		if (get_user(id, &kcontrols->id))
 			return -EFAULT;
+
 		if (ctrl_is_pointer(file, id)) {
 			void __user *s;
 
@@ -677,43 +835,54 @@ static int get_v4l2_ext_controls32(struc
 }
 
 static int put_v4l2_ext_controls32(struct file *file,
-				   struct v4l2_ext_controls *kp,
+				   struct v4l2_ext_controls __user *kp,
 				   struct v4l2_ext_controls32 __user *up)
 {
 	struct v4l2_ext_control32 __user *ucontrols;
-	struct v4l2_ext_control __user *kcontrols =
-		(__force struct v4l2_ext_control __user *)kp->controls;
-	int n = kp->count;
+	struct v4l2_ext_control __user *kcontrols;
+	u32 count;
+	u32 n;
 	compat_caddr_t p;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->ctrl_class, &up->ctrl_class) ||
-	    put_user(kp->count, &up->count) ||
-	    put_user(kp->error_idx, &up->error_idx) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
+	    assign_in_user(&up->ctrl_class, &kp->ctrl_class) ||
+	    get_user(count, &kp->count) ||
+	    put_user(count, &up->count) ||
+	    assign_in_user(&up->error_idx, &kp->error_idx) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)) ||
+	    get_user(kcontrols, &kp->controls))
 		return -EFAULT;
-	if (!kp->count)
-		return 0;
 
+	if (!count)
+		return 0;
 	if (get_user(p, &up->controls))
 		return -EFAULT;
 	ucontrols = compat_ptr(p);
-	if (!access_ok(VERIFY_WRITE, ucontrols, n * sizeof(*ucontrols)))
+	if (!access_ok(VERIFY_WRITE, ucontrols, count * sizeof(*ucontrols)))
 		return -EFAULT;
 
-	while (--n >= 0) {
-		unsigned size = sizeof(*ucontrols);
+	for (n = 0; n < count; n++) {
+		unsigned int size = sizeof(*ucontrols);
 		u32 id;
 
-		if (get_user(id, &kcontrols->id))
+		if (get_user(id, &kcontrols->id) ||
+		    put_user(id, &ucontrols->id) ||
+		    assign_in_user(&ucontrols->size, &kcontrols->size) ||
+		    copy_in_user(&ucontrols->reserved2, &kcontrols->reserved2,
+				 sizeof(ucontrols->reserved2)))
 			return -EFAULT;
-		/* Do not modify the pointer when copying a pointer control.
-		   The contents of the pointer was changed, not the pointer
-		   itself. */
+
+		/*
+		 * Do not modify the pointer when copying a pointer control.
+		 * The contents of the pointer was changed, not the pointer
+		 * itself.
+		 */
 		if (ctrl_is_pointer(file, id))
 			size -= sizeof(ucontrols->value64);
+
 		if (copy_in_user(ucontrols, kcontrols, size))
 			return -EFAULT;
+
 		ucontrols++;
 		kcontrols++;
 	}
@@ -732,17 +901,18 @@ struct v4l2_event32 {
 	__u32				reserved[8];
 };
 
-static int put_v4l2_event32(struct v4l2_event *kp, struct v4l2_event32 __user *up)
+static int put_v4l2_event32(struct v4l2_event __user *kp,
+			    struct v4l2_event32 __user *up)
 {
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->type, &up->type) ||
-	    copy_to_user(&up->u, &kp->u, sizeof(kp->u)) ||
-	    put_user(kp->pending, &up->pending) ||
-	    put_user(kp->sequence, &up->sequence) ||
-	    put_user(kp->timestamp.tv_sec, &up->timestamp.tv_sec) ||
-	    put_user(kp->timestamp.tv_nsec, &up->timestamp.tv_nsec) ||
-	    put_user(kp->id, &up->id) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(kp->reserved)))
+	    assign_in_user(&up->type, &kp->type) ||
+	    copy_in_user(&up->u, &kp->u, sizeof(kp->u)) ||
+	    assign_in_user(&up->pending, &kp->pending) ||
+	    assign_in_user(&up->sequence, &kp->sequence) ||
+	    assign_in_user(&up->timestamp.tv_sec, &kp->timestamp.tv_sec) ||
+	    assign_in_user(&up->timestamp.tv_nsec, &kp->timestamp.tv_nsec) ||
+	    assign_in_user(&up->id, &kp->id) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -755,31 +925,34 @@ struct v4l2_edid32 {
 	compat_caddr_t edid;
 };
 
-static int get_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
+static int get_v4l2_edid32(struct v4l2_edid __user *kp,
+			   struct v4l2_edid32 __user *up)
 {
-	u32 tmp;
+	compat_uptr_t tmp;
 
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
-	    get_user(kp->pad, &up->pad) ||
-	    get_user(kp->start_block, &up->start_block) ||
-	    get_user(kp->blocks, &up->blocks) ||
+	    assign_in_user(&kp->pad, &up->pad) ||
+	    assign_in_user(&kp->start_block, &up->start_block) ||
+	    assign_in_user(&kp->blocks, &up->blocks) ||
 	    get_user(tmp, &up->edid) ||
-	    copy_from_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
+	    put_user(compat_ptr(tmp), &kp->edid) ||
+	    copy_in_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
-	kp->edid = (__force u8 *)compat_ptr(tmp);
 	return 0;
 }
 
-static int put_v4l2_edid32(struct v4l2_edid *kp, struct v4l2_edid32 __user *up)
+static int put_v4l2_edid32(struct v4l2_edid __user *kp,
+			   struct v4l2_edid32 __user *up)
 {
-	u32 tmp = (u32)((unsigned long)kp->edid);
+	void *edid;
 
 	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
-	    put_user(kp->pad, &up->pad) ||
-	    put_user(kp->start_block, &up->start_block) ||
-	    put_user(kp->blocks, &up->blocks) ||
-	    put_user(tmp, &up->edid) ||
-	    copy_to_user(up->reserved, kp->reserved, sizeof(up->reserved)))
+	    assign_in_user(&up->pad, &kp->pad) ||
+	    assign_in_user(&up->start_block, &kp->start_block) ||
+	    assign_in_user(&up->blocks, &kp->blocks) ||
+	    get_user(edid, &kp->edid) ||
+	    put_user(ptr_to_compat(edid), &up->edid) ||
+	    copy_in_user(up->reserved, kp->reserved, sizeof(up->reserved)))
 		return -EFAULT;
 	return 0;
 }
@@ -796,7 +969,7 @@ static int put_v4l2_edid32(struct v4l2_e
 #define VIDIOC_ENUMINPUT32	_IOWR('V', 26, struct v4l2_input32)
 #define VIDIOC_G_EDID32		_IOWR('V', 40, struct v4l2_edid32)
 #define VIDIOC_S_EDID32		_IOWR('V', 41, struct v4l2_edid32)
-#define VIDIOC_TRY_FMT32      	_IOWR('V', 64, struct v4l2_format32)
+#define VIDIOC_TRY_FMT32	_IOWR('V', 64, struct v4l2_format32)
 #define VIDIOC_G_EXT_CTRLS32    _IOWR('V', 71, struct v4l2_ext_controls32)
 #define VIDIOC_S_EXT_CTRLS32    _IOWR('V', 72, struct v4l2_ext_controls32)
 #define VIDIOC_TRY_EXT_CTRLS32  _IOWR('V', 73, struct v4l2_ext_controls32)
@@ -812,22 +985,23 @@ static int put_v4l2_edid32(struct v4l2_e
 #define VIDIOC_G_OUTPUT32	_IOR ('V', 46, s32)
 #define VIDIOC_S_OUTPUT32	_IOWR('V', 47, s32)
 
+static int alloc_userspace(unsigned int size, u32 aux_space,
+			   void __user **up_native)
+{
+	*up_native = compat_alloc_user_space(size + aux_space);
+	if (!*up_native)
+		return -ENOMEM;
+	if (clear_user(*up_native, size))
+		return -EFAULT;
+	return 0;
+}
+
 static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
-	union {
-		struct v4l2_format v2f;
-		struct v4l2_buffer v2b;
-		struct v4l2_framebuffer v2fb;
-		struct v4l2_input v2i;
-		struct v4l2_standard v2s;
-		struct v4l2_ext_controls v2ecs;
-		struct v4l2_event v2ev;
-		struct v4l2_create_buffers v2crt;
-		struct v4l2_edid v2edid;
-		unsigned long vx;
-		int vi;
-	} karg;
 	void __user *up = compat_ptr(arg);
+	void __user *up_native = NULL;
+	void __user *aux_buf;
+	u32 aux_space;
 	int compatible_arg = 1;
 	long err = 0;
 
@@ -866,30 +1040,52 @@ static long do_video_ioctl(struct file *
 	case VIDIOC_STREAMOFF:
 	case VIDIOC_S_INPUT:
 	case VIDIOC_S_OUTPUT:
-		err = get_user(karg.vi, (s32 __user *)up);
+		err = alloc_userspace(sizeof(unsigned int), 0, &up_native);
+		if (!err && assign_in_user((unsigned int __user *)up_native,
+					   (compat_uint_t __user *)up))
+			err = -EFAULT;
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_INPUT:
 	case VIDIOC_G_OUTPUT:
+		err = alloc_userspace(sizeof(unsigned int), 0, &up_native);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_EDID:
 	case VIDIOC_S_EDID:
-		err = get_v4l2_edid32(&karg.v2edid, up);
+		err = alloc_userspace(sizeof(struct v4l2_edid), 0, &up_native);
+		if (!err)
+			err = get_v4l2_edid32(up_native, up);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_FMT:
 	case VIDIOC_S_FMT:
 	case VIDIOC_TRY_FMT:
-		err = get_v4l2_format32(&karg.v2f, up);
+		err = bufsize_v4l2_format(up, &aux_space);
+		if (!err)
+			err = alloc_userspace(sizeof(struct v4l2_format),
+					      aux_space, &up_native);
+		if (!err) {
+			aux_buf = up_native + sizeof(struct v4l2_format);
+			err = get_v4l2_format32(up_native, up,
+						aux_buf, aux_space);
+		}
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_CREATE_BUFS:
-		err = get_v4l2_create32(&karg.v2crt, up);
+		err = bufsize_v4l2_create(up, &aux_space);
+		if (!err)
+			err = alloc_userspace(sizeof(struct v4l2_create_buffers),
+					      aux_space, &up_native);
+		if (!err) {
+			aux_buf = up_native + sizeof(struct v4l2_create_buffers);
+			err = get_v4l2_create32(up_native, up,
+						aux_buf, aux_space);
+		}
 		compatible_arg = 0;
 		break;
 
@@ -897,36 +1093,63 @@ static long do_video_ioctl(struct file *
 	case VIDIOC_QUERYBUF:
 	case VIDIOC_QBUF:
 	case VIDIOC_DQBUF:
-		err = get_v4l2_buffer32(&karg.v2b, up);
+		err = bufsize_v4l2_buffer(up, &aux_space);
+		if (!err)
+			err = alloc_userspace(sizeof(struct v4l2_buffer),
+					      aux_space, &up_native);
+		if (!err) {
+			aux_buf = up_native + sizeof(struct v4l2_buffer);
+			err = get_v4l2_buffer32(up_native, up,
+						aux_buf, aux_space);
+		}
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_S_FBUF:
-		err = get_v4l2_framebuffer32(&karg.v2fb, up);
+		err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0,
+				      &up_native);
+		if (!err)
+			err = get_v4l2_framebuffer32(up_native, up);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_FBUF:
+		err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0,
+				      &up_native);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_ENUMSTD:
-		err = get_v4l2_standard32(&karg.v2s, up);
+		err = alloc_userspace(sizeof(struct v4l2_standard), 0,
+				      &up_native);
+		if (!err)
+			err = get_v4l2_standard32(up_native, up);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_ENUMINPUT:
-		err = get_v4l2_input32(&karg.v2i, up);
+		err = alloc_userspace(sizeof(struct v4l2_input), 0, &up_native);
+		if (!err)
+			err = get_v4l2_input32(up_native, up);
 		compatible_arg = 0;
 		break;
 
 	case VIDIOC_G_EXT_CTRLS:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_TRY_EXT_CTRLS:
-		err = get_v4l2_ext_controls32(file, &karg.v2ecs, up);
+		err = bufsize_v4l2_ext_controls(up, &aux_space);
+		if (!err)
+			err = alloc_userspace(sizeof(struct v4l2_ext_controls),
+					      aux_space, &up_native);
+		if (!err) {
+			aux_buf = up_native + sizeof(struct v4l2_ext_controls);
+			err = get_v4l2_ext_controls32(file, up_native, up,
+						      aux_buf, aux_space);
+		}
 		compatible_arg = 0;
 		break;
 	case VIDIOC_DQEVENT:
+		err = alloc_userspace(sizeof(struct v4l2_event), 0, &up_native);
 		compatible_arg = 0;
 		break;
 	}
@@ -935,25 +1158,26 @@ static long do_video_ioctl(struct file *
 
 	if (compatible_arg)
 		err = native_ioctl(file, cmd, (unsigned long)up);
-	else {
-		mm_segment_t old_fs = get_fs();
-
-		set_fs(KERNEL_DS);
-		err = native_ioctl(file, cmd, (unsigned long)&karg);
-		set_fs(old_fs);
-	}
+	else
+		err = native_ioctl(file, cmd, (unsigned long)up_native);
 
 	if (err == -ENOTTY)
 		return err;
 
-	/* Special case: even after an error we need to put the
-	   results back for these ioctls since the error_idx will
-	   contain information on which control failed. */
+	/*
+	 * Special case: even after an error we need to put the
+	 * results back for these ioctls since the error_idx will
+	 * contain information on which control failed.
+	 */
 	switch (cmd) {
 	case VIDIOC_G_EXT_CTRLS:
 	case VIDIOC_S_EXT_CTRLS:
 	case VIDIOC_TRY_EXT_CTRLS:
-		if (put_v4l2_ext_controls32(file, &karg.v2ecs, up))
+		if (put_v4l2_ext_controls32(file, up_native, up))
+			err = -EFAULT;
+		break;
+	case VIDIOC_S_EDID:
+		if (put_v4l2_edid32(up_native, up))
 			err = -EFAULT;
 		break;
 	}
@@ -965,45 +1189,46 @@ static long do_video_ioctl(struct file *
 	case VIDIOC_S_OUTPUT:
 	case VIDIOC_G_INPUT:
 	case VIDIOC_G_OUTPUT:
-		err = put_user(((s32)karg.vi), (s32 __user *)up);
+		if (assign_in_user((compat_uint_t __user *)up,
+				   ((unsigned int __user *)up_native)))
+			err = -EFAULT;
 		break;
 
 	case VIDIOC_G_FBUF:
-		err = put_v4l2_framebuffer32(&karg.v2fb, up);
+		err = put_v4l2_framebuffer32(up_native, up);
 		break;
 
 	case VIDIOC_DQEVENT:
-		err = put_v4l2_event32(&karg.v2ev, up);
+		err = put_v4l2_event32(up_native, up);
 		break;
 
 	case VIDIOC_G_EDID:
-	case VIDIOC_S_EDID:
-		err = put_v4l2_edid32(&karg.v2edid, up);
+		err = put_v4l2_edid32(up_native, up);
 		break;
 
 	case VIDIOC_G_FMT:
 	case VIDIOC_S_FMT:
 	case VIDIOC_TRY_FMT:
-		err = put_v4l2_format32(&karg.v2f, up);
+		err = put_v4l2_format32(up_native, up);
 		break;
 
 	case VIDIOC_CREATE_BUFS:
-		err = put_v4l2_create32(&karg.v2crt, up);
+		err = put_v4l2_create32(up_native, up);
 		break;
 
 	case VIDIOC_PREPARE_BUF:
 	case VIDIOC_QUERYBUF:
 	case VIDIOC_QBUF:
 	case VIDIOC_DQBUF:
-		err = put_v4l2_buffer32(&karg.v2b, up);
+		err = put_v4l2_buffer32(up_native, up);
 		break;
 
 	case VIDIOC_ENUMSTD:
-		err = put_v4l2_standard32(&karg.v2s, up);
+		err = put_v4l2_standard32(up_native, up);
 		break;
 
 	case VIDIOC_ENUMINPUT:
-		err = put_v4l2_input32(&karg.v2i, up);
+		err = put_v4l2_input32(up_native, up);
 		break;
 	}
 	return err;


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 15/18] media: v4l2-ctrls: fix sparse warning

[Mauro Carvalho Chehab]

From: Hans Verkuil <hans.verkuil@cisco.com>

The warning is simple:

drivers/media/v4l2-core/v4l2-ctrls.c:1685:15: warning: incorrect type in assignment (different address spaces)

but the fix isn't.

The core problem was that the conversion from user to kernelspace was
done at too low a level and that needed to be moved up. That made it possible
to drop pointers to v4l2_ext_control from set_ctrl and validate_new and
clean up this sparse warning because those functions now always operate
on kernelspace pointers.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
 drivers/media/v4l2-core/v4l2-ctrls.c | 87 +++++++++++++++++++++---------------
 1 file changed, 52 insertions(+), 35 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 7905ad9ffa35..3c4e22855652 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1668,10 +1668,8 @@ static int check_range(enum v4l2_ctrl_type type,
 }
 
 /* Validate a new control */
-static int validate_new(const struct v4l2_ctrl *ctrl,
-			struct v4l2_ext_control *c)
+static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
 {
-	union v4l2_ctrl_ptr ptr;
 	unsigned idx;
 	int err = 0;
 
@@ -1684,19 +1682,14 @@ static int validate_new(const struct v4l2_ctrl *ctrl,
 		case V4L2_CTRL_TYPE_BOOLEAN:
 		case V4L2_CTRL_TYPE_BUTTON:
 		case V4L2_CTRL_TYPE_CTRL_CLASS:
-			ptr.p_s32 = &c->value;
-			return ctrl->type_ops->validate(ctrl, 0, ptr);
-
 		case V4L2_CTRL_TYPE_INTEGER64:
-			ptr.p_s64 = &c->value64;
-			return ctrl->type_ops->validate(ctrl, 0, ptr);
+			return ctrl->type_ops->validate(ctrl, 0, p_new);
 		default:
 			break;
 		}
 	}
-	ptr.p = c->ptr;
-	for (idx = 0; !err && idx < c->size / ctrl->elem_size; idx++)
-		err = ctrl->type_ops->validate(ctrl, idx, ptr);
+	for (idx = 0; !err && idx < ctrl->elems; idx++)
+		err = ctrl->type_ops->validate(ctrl, idx, p_new);
 	return err;
 }
 
@@ -3020,6 +3013,7 @@ static int validate_ctrls(struct v4l2_ext_controls *cs,
 	cs->error_idx = cs->count;
 	for (i = 0; i < cs->count; i++) {
 		struct v4l2_ctrl *ctrl = helpers[i].ctrl;
+		union v4l2_ctrl_ptr p_new;
 
 		cs->error_idx = i;
 
@@ -3033,7 +3027,17 @@ static int validate_ctrls(struct v4l2_ext_controls *cs,
 		   best-effort to avoid that. */
 		if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
 			return -EBUSY;
-		ret = validate_new(ctrl, &cs->controls[i]);
+		/*
+		 * Skip validation for now if the payload needs to be copied
+		 * from userspace into kernelspace. We'll validate those later.
+		 */
+		if (ctrl->is_ptr)
+			continue;
+		if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
+			p_new.p_s64 = &cs->controls[i].value64;
+		else
+			p_new.p_s32 = &cs->controls[i].value;
+		ret = validate_new(ctrl, p_new);
 		if (ret)
 			return ret;
 	}
@@ -3128,7 +3132,11 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
 		/* Copy the new caller-supplied control values.
 		   user_to_new() sets 'is_new' to 1. */
 		do {
-			ret = user_to_new(cs->controls + idx, helpers[idx].ctrl);
+			struct v4l2_ctrl *ctrl = helpers[idx].ctrl;
+
+			ret = user_to_new(cs->controls + idx, ctrl);
+			if (!ret && ctrl->is_ptr)
+				ret = validate_new(ctrl, ctrl->p_new);
 			idx = helpers[idx].next;
 		} while (!ret && idx);
 
@@ -3178,10 +3186,10 @@ int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs
 EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
 
 /* Helper function for VIDIOC_S_CTRL compatibility */
-static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
-		    struct v4l2_ext_control *c, u32 ch_flags)
+static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
 {
 	struct v4l2_ctrl *master = ctrl->cluster[0];
+	int ret;
 	int i;
 
 	/* Reset the 'is_new' flags of the cluster */
@@ -3189,8 +3197,9 @@ static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
 		if (master->cluster[i])
 			master->cluster[i]->is_new = 0;
 
-	if (c)
-		user_to_new(c, ctrl);
+	ret = validate_new(ctrl, ctrl->p_new);
+	if (ret)
+		return ret;
 
 	/* For autoclusters with volatiles that are switched from auto to
 	   manual mode we have to update the current volatile values since
@@ -3207,15 +3216,14 @@ static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
 static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
 			 struct v4l2_ext_control *c)
 {
-	int ret = validate_new(ctrl, c);
+	int ret;
 
-	if (!ret) {
-		v4l2_ctrl_lock(ctrl);
-		ret = set_ctrl(fh, ctrl, c, 0);
-		if (!ret)
-			cur_to_user(c, ctrl);
-		v4l2_ctrl_unlock(ctrl);
-	}
+	v4l2_ctrl_lock(ctrl);
+	user_to_new(c, ctrl);
+	ret = set_ctrl(fh, ctrl, 0);
+	if (!ret)
+		cur_to_user(c, ctrl);
+	v4l2_ctrl_unlock(ctrl);
 	return ret;
 }
 
@@ -3223,7 +3231,7 @@ int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
 					struct v4l2_control *control)
 {
 	struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
-	struct v4l2_ext_control c;
+	struct v4l2_ext_control c = { control->id };
 	int ret;
 
 	if (ctrl == NULL || !ctrl->is_int)
@@ -3252,7 +3260,7 @@ int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
 	/* It's a driver bug if this happens. */
 	WARN_ON(!ctrl->is_int);
 	ctrl->val = val;
-	return set_ctrl(NULL, ctrl, NULL, 0);
+	return set_ctrl(NULL, ctrl, 0);
 }
 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
 
@@ -3263,7 +3271,7 @@ int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
 	/* It's a driver bug if this happens. */
 	WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
 	*ctrl->p_new.p_s64 = val;
-	return set_ctrl(NULL, ctrl, NULL, 0);
+	return set_ctrl(NULL, ctrl, 0);
 }
 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
 
@@ -3274,7 +3282,7 @@ int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
 	/* It's a driver bug if this happens. */
 	WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING);
 	strlcpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
-	return set_ctrl(NULL, ctrl, NULL, 0);
+	return set_ctrl(NULL, ctrl, 0);
 }
 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
 
@@ -3297,8 +3305,8 @@ EXPORT_SYMBOL(v4l2_ctrl_notify);
 int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
 			s64 min, s64 max, u64 step, s64 def)
 {
+	bool changed;
 	int ret;
-	struct v4l2_ext_control c;
 
 	lockdep_assert_held(ctrl->handler->lock);
 
@@ -3325,11 +3333,20 @@ int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
 	ctrl->maximum = max;
 	ctrl->step = step;
 	ctrl->default_value = def;
-	c.value = *ctrl->p_cur.p_s32;
-	if (validate_new(ctrl, &c))
-		c.value = def;
-	if (c.value != *ctrl->p_cur.p_s32)
-		ret = set_ctrl(NULL, ctrl, &c, V4L2_EVENT_CTRL_CH_RANGE);
+	cur_to_new(ctrl);
+	if (validate_new(ctrl, ctrl->p_new)) {
+		if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
+			*ctrl->p_new.p_s64 = def;
+		else
+			*ctrl->p_new.p_s32 = def;
+	}
+
+	if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
+		changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
+	else
+		changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
+	if (changed)
+		ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
 	else
 		send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
 	return ret;
-- 
2.14.3

Patch "media: v4l2-ctrls: fix sparse warning" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-ctrls: fix sparse warning

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-ctrls-fix-sparse-warning.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:34 -0300
Subject: media: v4l2-ctrls: fix sparse warning
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mauro Carvalho Chehab <mchehab@osg.samsung.com>, Mauro Carvalho Chehab <mchehab@s-opensource.com>
Message-ID: <d53d22eb0ea4cdbcb2e7f02d789a01892d8c36cf.1522260310.git.mchehab@s-opensource.com>

From: Hans Verkuil <hans.verkuil@cisco.com>

The warning is simple:

drivers/media/v4l2-core/v4l2-ctrls.c:1685:15: warning: incorrect type in assignment (different address spaces)

but the fix isn't.

The core problem was that the conversion from user to kernelspace was
done at too low a level and that needed to be moved up. That made it possible
to drop pointers to v4l2_ext_control from set_ctrl and validate_new and
clean up this sparse warning because those functions now always operate
on kernelspace pointers.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-ctrls.c |   87 ++++++++++++++++++++---------------
 1 file changed, 52 insertions(+), 35 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1668,10 +1668,8 @@ static int check_range(enum v4l2_ctrl_ty
 }
 
 /* Validate a new control */
-static int validate_new(const struct v4l2_ctrl *ctrl,
-			struct v4l2_ext_control *c)
+static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
 {
-	union v4l2_ctrl_ptr ptr;
 	unsigned idx;
 	int err = 0;
 
@@ -1684,19 +1682,14 @@ static int validate_new(const struct v4l
 		case V4L2_CTRL_TYPE_BOOLEAN:
 		case V4L2_CTRL_TYPE_BUTTON:
 		case V4L2_CTRL_TYPE_CTRL_CLASS:
-			ptr.p_s32 = &c->value;
-			return ctrl->type_ops->validate(ctrl, 0, ptr);
-
 		case V4L2_CTRL_TYPE_INTEGER64:
-			ptr.p_s64 = &c->value64;
-			return ctrl->type_ops->validate(ctrl, 0, ptr);
+			return ctrl->type_ops->validate(ctrl, 0, p_new);
 		default:
 			break;
 		}
 	}
-	ptr.p = c->ptr;
-	for (idx = 0; !err && idx < c->size / ctrl->elem_size; idx++)
-		err = ctrl->type_ops->validate(ctrl, idx, ptr);
+	for (idx = 0; !err && idx < ctrl->elems; idx++)
+		err = ctrl->type_ops->validate(ctrl, idx, p_new);
 	return err;
 }
 
@@ -3020,6 +3013,7 @@ static int validate_ctrls(struct v4l2_ex
 	cs->error_idx = cs->count;
 	for (i = 0; i < cs->count; i++) {
 		struct v4l2_ctrl *ctrl = helpers[i].ctrl;
+		union v4l2_ctrl_ptr p_new;
 
 		cs->error_idx = i;
 
@@ -3033,7 +3027,17 @@ static int validate_ctrls(struct v4l2_ex
 		   best-effort to avoid that. */
 		if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
 			return -EBUSY;
-		ret = validate_new(ctrl, &cs->controls[i]);
+		/*
+		 * Skip validation for now if the payload needs to be copied
+		 * from userspace into kernelspace. We'll validate those later.
+		 */
+		if (ctrl->is_ptr)
+			continue;
+		if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
+			p_new.p_s64 = &cs->controls[i].value64;
+		else
+			p_new.p_s32 = &cs->controls[i].value;
+		ret = validate_new(ctrl, p_new);
 		if (ret)
 			return ret;
 	}
@@ -3128,7 +3132,11 @@ static int try_set_ext_ctrls(struct v4l2
 		/* Copy the new caller-supplied control values.
 		   user_to_new() sets 'is_new' to 1. */
 		do {
-			ret = user_to_new(cs->controls + idx, helpers[idx].ctrl);
+			struct v4l2_ctrl *ctrl = helpers[idx].ctrl;
+
+			ret = user_to_new(cs->controls + idx, ctrl);
+			if (!ret && ctrl->is_ptr)
+				ret = validate_new(ctrl, ctrl->p_new);
 			idx = helpers[idx].next;
 		} while (!ret && idx);
 
@@ -3178,10 +3186,10 @@ int v4l2_subdev_s_ext_ctrls(struct v4l2_
 EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
 
 /* Helper function for VIDIOC_S_CTRL compatibility */
-static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
-		    struct v4l2_ext_control *c, u32 ch_flags)
+static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
 {
 	struct v4l2_ctrl *master = ctrl->cluster[0];
+	int ret;
 	int i;
 
 	/* Reset the 'is_new' flags of the cluster */
@@ -3189,8 +3197,9 @@ static int set_ctrl(struct v4l2_fh *fh,
 		if (master->cluster[i])
 			master->cluster[i]->is_new = 0;
 
-	if (c)
-		user_to_new(c, ctrl);
+	ret = validate_new(ctrl, ctrl->p_new);
+	if (ret)
+		return ret;
 
 	/* For autoclusters with volatiles that are switched from auto to
 	   manual mode we have to update the current volatile values since
@@ -3207,15 +3216,14 @@ static int set_ctrl(struct v4l2_fh *fh,
 static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
 			 struct v4l2_ext_control *c)
 {
-	int ret = validate_new(ctrl, c);
+	int ret;
 
-	if (!ret) {
-		v4l2_ctrl_lock(ctrl);
-		ret = set_ctrl(fh, ctrl, c, 0);
-		if (!ret)
-			cur_to_user(c, ctrl);
-		v4l2_ctrl_unlock(ctrl);
-	}
+	v4l2_ctrl_lock(ctrl);
+	user_to_new(c, ctrl);
+	ret = set_ctrl(fh, ctrl, 0);
+	if (!ret)
+		cur_to_user(c, ctrl);
+	v4l2_ctrl_unlock(ctrl);
 	return ret;
 }
 
@@ -3223,7 +3231,7 @@ int v4l2_s_ctrl(struct v4l2_fh *fh, stru
 					struct v4l2_control *control)
 {
 	struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
-	struct v4l2_ext_control c;
+	struct v4l2_ext_control c = { control->id };
 	int ret;
 
 	if (ctrl == NULL || !ctrl->is_int)
@@ -3252,7 +3260,7 @@ int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl
 	/* It's a driver bug if this happens. */
 	WARN_ON(!ctrl->is_int);
 	ctrl->val = val;
-	return set_ctrl(NULL, ctrl, NULL, 0);
+	return set_ctrl(NULL, ctrl, 0);
 }
 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
 
@@ -3263,7 +3271,7 @@ int __v4l2_ctrl_s_ctrl_int64(struct v4l2
 	/* It's a driver bug if this happens. */
 	WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
 	*ctrl->p_new.p_s64 = val;
-	return set_ctrl(NULL, ctrl, NULL, 0);
+	return set_ctrl(NULL, ctrl, 0);
 }
 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
 
@@ -3274,7 +3282,7 @@ int __v4l2_ctrl_s_ctrl_string(struct v4l
 	/* It's a driver bug if this happens. */
 	WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING);
 	strlcpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
-	return set_ctrl(NULL, ctrl, NULL, 0);
+	return set_ctrl(NULL, ctrl, 0);
 }
 EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
 
@@ -3297,8 +3305,8 @@ EXPORT_SYMBOL(v4l2_ctrl_notify);
 int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
 			s64 min, s64 max, u64 step, s64 def)
 {
+	bool changed;
 	int ret;
-	struct v4l2_ext_control c;
 
 	lockdep_assert_held(ctrl->handler->lock);
 
@@ -3325,11 +3333,20 @@ int __v4l2_ctrl_modify_range(struct v4l2
 	ctrl->maximum = max;
 	ctrl->step = step;
 	ctrl->default_value = def;
-	c.value = *ctrl->p_cur.p_s32;
-	if (validate_new(ctrl, &c))
-		c.value = def;
-	if (c.value != *ctrl->p_cur.p_s32)
-		ret = set_ctrl(NULL, ctrl, &c, V4L2_EVENT_CTRL_CH_RANGE);
+	cur_to_new(ctrl);
+	if (validate_new(ctrl, ctrl->p_new)) {
+		if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
+			*ctrl->p_new.p_s64 = def;
+		else
+			*ctrl->p_new.p_s32 = def;
+	}
+
+	if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
+		changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
+	else
+		changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
+	if (changed)
+		ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
 	else
 		send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
 	return ret;


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 16/18] media: media/v4l2-ctrls: volatiles should not generate CH_VALUE

[Mauro Carvalho Chehab]

From: Ricardo Ribalda <ricardo.ribalda@gmail.com>

Volatile controls should not generate CH_VALUE events.

Set has_changed to false to prevent this happening.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
 drivers/media/v4l2-core/v4l2-ctrls.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 3c4e22855652..2bdb2a3512a4 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1619,6 +1619,15 @@ static int cluster_changed(struct v4l2_ctrl *master)
 
 		if (ctrl == NULL)
 			continue;
+		/*
+		 * Set has_changed to false to avoid generating
+		 * the event V4L2_EVENT_CTRL_CH_VALUE
+		 */
+		if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
+			ctrl->has_changed = false;
+			continue;
+		}
+
 		for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
 			ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
 				ctrl->p_cur, ctrl->p_new);
-- 
2.14.3

Patch "media: media/v4l2-ctrls: volatiles should not generate CH_VALUE" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: media/v4l2-ctrls: volatiles should not generate CH_VALUE

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:35 -0300
Subject: media: media/v4l2-ctrls: volatiles should not generate CH_VALUE
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Ricardo Ribalda <ricardo.ribalda@gmail.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@osg.samsung.com>, Mauro Carvalho Chehab <mchehab@s-opensource.com>
Message-ID: <1663cf48e2eb96405c5d6d874020aa9925ee217f.1522260310.git.mchehab@s-opensource.com>

From: Ricardo Ribalda <ricardo.ribalda@gmail.com>

Volatile controls should not generate CH_VALUE events.

Set has_changed to false to prevent this happening.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-ctrls.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1619,6 +1619,15 @@ static int cluster_changed(struct v4l2_c
 
 		if (ctrl == NULL)
 			continue;
+		/*
+		 * Set has_changed to false to avoid generating
+		 * the event V4L2_EVENT_CTRL_CH_VALUE
+		 */
+		if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
+			ctrl->has_changed = false;
+			continue;
+		}
+
 		for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
 			ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
 				ctrl->p_cur, ctrl->p_new);


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

Patch "media: media/v4l2-ctrls: volatiles should not generate CH_VALUE" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: media/v4l2-ctrls: volatiles should not generate CH_VALUE

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:35 -0300
Subject: media: media/v4l2-ctrls: volatiles should not generate CH_VALUE
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Ricardo Ribalda <ricardo.ribalda@gmail.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Hans Verkuil <hans.verkuil@cisco.com>, Mauro Carvalho Chehab <mchehab@osg.samsung.com>, Mauro Carvalho Chehab <mchehab@s-opensource.com>
Message-ID: <1663cf48e2eb96405c5d6d874020aa9925ee217f.1522260310.git.mchehab@s-opensource.com>

From: Ricardo Ribalda <ricardo.ribalda@gmail.com>

Volatile controls should not generate CH_VALUE events.

Set has_changed to false to prevent this happening.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-ctrls.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1619,6 +1619,15 @@ static int cluster_changed(struct v4l2_c
 
 		if (ctrl == NULL)
 			continue;
+		/*
+		 * Set has_changed to false to avoid generating
+		 * the event V4L2_EVENT_CTRL_CH_VALUE
+		 */
+		if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
+			ctrl->has_changed = false;
+			continue;
+		}
+
 		for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
 			ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
 				ctrl->p_cur, ctrl->p_new);


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 17/18] media: v4l2-compat-ioctl32: use compat_u64 for video standard

[Mauro Carvalho Chehab]

Instead of using the "v4l2_std_id" typedef, use compat_u64,
as otherwise it fails to properly handle some ioctls.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index e03aa0961360..c76438dd3ead 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -686,7 +686,7 @@ struct v4l2_input32 {
 	__u32	     type;		/*  Type of input */
 	__u32	     audioset;		/*  Associated audios (bitfield) */
 	__u32        tuner;             /*  Associated tuner */
-	v4l2_std_id  std;
+	compat_u64   std;
 	__u32	     status;
 	__u32	     capabilities;
 	__u32	     reserved[3];
-- 
2.14.3

Patch "media: v4l2-compat-ioctl32: use compat_u64 for video standard" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32: use compat_u64 for video standard

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:36 -0300
Subject: media: v4l2-compat-ioctl32: use compat_u64 for video standard
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Mauro Carvalho Chehab <mchehab@s-opensource.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Message-ID: <2ba9505436180b463d47d6da4ce5e059b383938e.1522260310.git.mchehab@s-opensource.com>

From: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Instead of using the "v4l2_std_id" typedef, use compat_u64,
as otherwise it fails to properly handle some ioctls.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -686,7 +686,7 @@ struct v4l2_input32 {
 	__u32	     type;		/*  Type of input */
 	__u32	     audioset;		/*  Associated audios (bitfield) */
 	__u32        tuner;             /*  Associated tuner */
-	v4l2_std_id  std;
+	compat_u64   std;
 	__u32	     status;
 	__u32	     capabilities;
 	__u32	     reserved[3];


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

Patch "media: v4l2-compat-ioctl32: use compat_u64 for video standard" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32: use compat_u64 for video standard

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:36 -0300
Subject: media: v4l2-compat-ioctl32: use compat_u64 for video standard
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Mauro Carvalho Chehab <mchehab@s-opensource.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Message-ID: <2ba9505436180b463d47d6da4ce5e059b383938e.1522260310.git.mchehab@s-opensource.com>

From: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Instead of using the "v4l2_std_id" typedef, use compat_u64,
as otherwise it fails to properly handle some ioctls.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -686,7 +686,7 @@ struct v4l2_input32 {
 	__u32	     type;		/*  Type of input */
 	__u32	     audioset;		/*  Associated audios (bitfield) */
 	__u32        tuner;             /*  Associated tuner */
-	v4l2_std_id  std;
+	compat_u64   std;
 	__u32	     status;
 	__u32	     capabilities;
 	__u32	     reserved[3];


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

[PATCH for v3.18 18/18] media: v4l2-compat-ioctl32: initialize a reserved field

[Mauro Carvalho Chehab]

The get_v4l2_create32() function is missing a logic with
would be cleaning a reserved field, causing v4l2-compliance
to complain:

 Buffer ioctls (Input 0):
		fail: v4l2-test-buffers.cpp(506): check_0(crbufs.reserved, sizeof(crbufs.reserved))
	test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: FAIL

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index c76438dd3ead..ca0a43ad4ec8 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -247,7 +247,8 @@ static int get_v4l2_create32(struct v4l2_create_buffers __user *kp,
 {
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    copy_in_user(kp, up,
-			 offsetof(struct v4l2_create_buffers32, format)))
+			 offsetof(struct v4l2_create_buffers32, format)) ||
+	    copy_in_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
 	return __get_v4l2_format32(&kp->format, &up->format,
 				   aux_buf, aux_space);
-- 
2.14.3

Patch "media: v4l2-compat-ioctl32: initialize a reserved field" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32: initialize a reserved field

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:37 -0300
Subject: media: v4l2-compat-ioctl32: initialize a reserved field
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Mauro Carvalho Chehab <mchehab@s-opensource.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Message-ID: <d8a647b26822fb0a86f6ee7dff4d6eb1e85e1398.1522260310.git.mchehab@s-opensource.com>

From: Mauro Carvalho Chehab <mchehab@s-opensource.com>

The get_v4l2_create32() function is missing a logic with
would be cleaning a reserved field, causing v4l2-compliance
to complain:

 Buffer ioctls (Input 0):
		fail: v4l2-test-buffers.cpp(506): check_0(crbufs.reserved, sizeof(crbufs.reserved))
	test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: FAIL

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -247,7 +247,8 @@ static int get_v4l2_create32(struct v4l2
 {
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    copy_in_user(kp, up,
-			 offsetof(struct v4l2_create_buffers32, format)))
+			 offsetof(struct v4l2_create_buffers32, format)) ||
+	    copy_in_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
 	return __get_v4l2_format32(&kp->format, &up->format,
 				   aux_buf, aux_space);


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

Patch "media: v4l2-compat-ioctl32: initialize a reserved field" has been added to the 3.18-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    media: v4l2-compat-ioctl32: initialize a reserved field

to the 3.18-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Apr  4 17:30:18 CEST 2018
From: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Date: Wed, 28 Mar 2018 15:12:37 -0300
Subject: media: v4l2-compat-ioctl32: initialize a reserved field
To: Linux Media Mailing List <linux-media@vger.kernel.org>, stable@vger.kernel.org
Cc: Mauro Carvalho Chehab <mchehab@s-opensource.com>, Mauro Carvalho Chehab <mchehab@infradead.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Message-ID: <d8a647b26822fb0a86f6ee7dff4d6eb1e85e1398.1522260310.git.mchehab@s-opensource.com>

From: Mauro Carvalho Chehab <mchehab@s-opensource.com>

The get_v4l2_create32() function is missing a logic with
would be cleaning a reserved field, causing v4l2-compliance
to complain:

 Buffer ioctls (Input 0):
		fail: v4l2-test-buffers.cpp(506): check_0(crbufs.reserved, sizeof(crbufs.reserved))
	test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: FAIL

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -247,7 +247,8 @@ static int get_v4l2_create32(struct v4l2
 {
 	if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
 	    copy_in_user(kp, up,
-			 offsetof(struct v4l2_create_buffers32, format)))
+			 offsetof(struct v4l2_create_buffers32, format)) ||
+	    copy_in_user(kp->reserved, up->reserved, sizeof(kp->reserved)))
 		return -EFAULT;
 	return __get_v4l2_format32(&kp->format, &up->format,
 				   aux_buf, aux_space);


Patches currently in stable-queue which might be from mchehab@s-opensource.com are

queue-3.18/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch
queue-3.18/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch
queue-3.18/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch
queue-3.18/media-v4l2-compat-ioctl32-use-compat_u64-for-video-standard.patch
queue-3.18/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch
queue-3.18/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch
queue-3.18/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch
queue-3.18/media-v4l2-ctrls-fix-sparse-warning.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch
queue-3.18/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch
queue-3.18/media-media-v4l2-ctrls-volatiles-should-not-generate-ch_value.patch
queue-3.18/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch
queue-3.18/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch
queue-3.18/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch
queue-3.18/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch
queue-3.18/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch
queue-3.18/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch
queue-3.18/media-v4l2-compat-ioctl32-initialize-a-reserved-field.patch

Re: [PATCH for v3.18 00/18] Backport CVE-2017-13166 fixes to Kernel 3.18

[Inki Dae]

Hi Mauro,

2018년 03월 29일 03:12에 Mauro Carvalho Chehab 이(가) 쓴 글:
> Hi Greg,
> 
> Those are the backports meant to solve CVE-2017-13166 on Kernel 3.18.
> 
> It contains two v4l2-ctrls fixes that are required to avoid crashes
> at the test application.
> 
> I wrote two patches myself for Kernel 3.18 in order to solve some
> issues specific for Kernel 3.18 with aren't needed upstream.
> one is actually a one-line change backport. The other one makes
> sure that both 32-bits and 64-bits version of some ioctl calls
> will return the same value for a reserved field.
> 
> I noticed an extra bug while testing it, but the bug also hits upstream,
> and should be backported all the way down all stable/LTS versions.
> So, I'll send it the usual way, after merging upsream.

Really thanks for doing this. :) There would be many users who use Linux-3.18 for their products yet.

Thanks,
Inki Dae

> 
> Regards,
> Mauro
> 
> 
> Daniel Mentz (2):
>   media: v4l2-compat-ioctl32: Copy v4l2_window->global_alpha
>   media: v4l2-compat-ioctl32.c: refactor compat ioctl32 logic
> 
> Hans Verkuil (12):
>   media: v4l2-ioctl.c: don't copy back the result for -ENOTTY
>   media: v4l2-compat-ioctl32.c: add missing VIDIOC_PREPARE_BUF
>   media: v4l2-compat-ioctl32.c: fix the indentation
>   media: v4l2-compat-ioctl32.c: move 'helper' functions to
>     __get/put_v4l2_format32
>   media: v4l2-compat-ioctl32.c: avoid sizeof(type)
>   media: v4l2-compat-ioctl32.c: copy m.userptr in put_v4l2_plane32
>   media: v4l2-compat-ioctl32.c: fix ctrl_is_pointer
>   media: v4l2-compat-ioctl32.c: make ctrl_is_pointer work for subdevs
>   media: v4l2-compat-ioctl32.c: copy clip list in put_v4l2_window32
>   media: v4l2-compat-ioctl32.c: drop pr_info for unknown buffer type
>   media: v4l2-compat-ioctl32.c: don't copy back the result for certain
>     errors
>   media: v4l2-ctrls: fix sparse warning
> 
> Mauro Carvalho Chehab (2):
>   media: v4l2-compat-ioctl32: use compat_u64 for video standard
>   media: v4l2-compat-ioctl32: initialize a reserved field
> 
> Ricardo Ribalda (2):
>   vb2: V4L2_BUF_FLAG_DONE is set after DQBUF
>   media: media/v4l2-ctrls: volatiles should not generate CH_VALUE
> 
>  drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 1020 +++++++++++++++----------
>  drivers/media/v4l2-core/v4l2-ctrls.c          |   96 ++-
>  drivers/media/v4l2-core/v4l2-ioctl.c          |    5 +-
>  drivers/media/v4l2-core/videobuf2-core.c      |    5 +
>  4 files changed, 691 insertions(+), 435 deletions(-)
> 

Re: [PATCH for v3.18 00/18] Backport CVE-2017-13166 fixes to Kernel 3.18

[Greg KH]

On Thu, Mar 29, 2018 at 08:22:08AM +0900, Inki Dae wrote:
> Really thanks for doing this. :) There would be many users who use
> Linux-3.18 for their products yet.

For new products?  They really should not be.  The kernel is officially
end-of-life, but I'm keeping it alive for a short while longer just
because too many people seem to still be using it.  However, they are
not actually updating the kernel in their devices, so I don't think I
will be doing many more new 3.18.y releases.

It's a problem when people ask for support, and then don't use the
releases given to them :(

What is keeping you on 3.18.y and not allowing you to move to a newer
kernel version?

thanks,

greg k-h

Re: [PATCH for v3.18 00/18] Backport CVE-2017-13166 fixes to Kernel 3.18

[Inki Dae]

2018년 03월 29일 13:25에 Greg KH 이(가) 쓴 글:
> On Thu, Mar 29, 2018 at 08:22:08AM +0900, Inki Dae wrote:
>> Really thanks for doing this. :) There would be many users who use
>> Linux-3.18 for their products yet.
> 
> For new products?  They really should not be.  The kernel is officially

Really no. Old products would still be using Linux-3.18 kernel without kernel upgrade. For new product, most of SoC vendors will use Linux-4.x including us.
Actually, we are preparing for kernel upgrade for some devices even some old devices (to Linux-4.14-LTS) and almost done.

> end-of-life, but I'm keeping it alive for a short while longer just
> because too many people seem to still be using it.  However, they are
> not actually updating the kernel in their devices, so I don't think I
> will be doing many more new 3.18.y releases.
> 
> It's a problem when people ask for support, and then don't use the
> releases given to them :(
> 
> What is keeping you on 3.18.y and not allowing you to move to a newer
> kernel version?

We also want to move to latest kernel version. However, there is a case that we cannot upgrade the kernel.
In case that SoC vendor never share firmwares and relevant data sheets, we cannot upgrade the kernel. However, we have to resolve the security issues for users of this device.

Thanks,
Inki Dae

> 
> thanks,
> 
> greg k-h
> 
> 
> 

Re: [PATCH for v3.18 00/18] Backport CVE-2017-13166 fixes to Kernel 3.18

[Greg KH]

On Thu, Mar 29, 2018 at 03:39:54PM +0900, Inki Dae wrote:
> 2018년 03월 29일 13:25에 Greg KH 이(가) 쓴 글:
> > On Thu, Mar 29, 2018 at 08:22:08AM +0900, Inki Dae wrote:
> >> Really thanks for doing this. :) There would be many users who use
> >> Linux-3.18 for their products yet.
> > 
> > For new products?  They really should not be.  The kernel is officially
> 
> Really no. Old products would still be using Linux-3.18 kernel without
> kernel upgrade. For new product, most of SoC vendors will use
> Linux-4.x including us.
> Actually, we are preparing for kernel upgrade for some devices even
> some old devices (to Linux-4.14-LTS) and almost done.

That is great to hear.

> > What is keeping you on 3.18.y and not allowing you to move to a newer
> > kernel version?
> 
> We also want to move to latest kernel version. However, there is a case that we cannot upgrade the kernel.
> In case that SoC vendor never share firmwares and relevant data
> sheets, we cannot upgrade the kernel. However, we have to resolve the
> security issues for users of this device.

It sounds like you need to be getting those security updates from those
SoC vendors, as they are the ones you are paying for support for that
kernel version that they are forcing you to stay on.

good luck!

greg k-h

Re: [PATCH for v3.18 00/18] Backport CVE-2017-13166 fixes to Kernel 3.18

[Inki Dae]

2018년 03월 29일 16:00에 Greg KH 이(가) 쓴 글:
> On Thu, Mar 29, 2018 at 03:39:54PM +0900, Inki Dae wrote:
>> 2018년 03월 29일 13:25에 Greg KH 이(가) 쓴 글:
>>> On Thu, Mar 29, 2018 at 08:22:08AM +0900, Inki Dae wrote:
>>>> Really thanks for doing this. :) There would be many users who use
>>>> Linux-3.18 for their products yet.
>>>
>>> For new products?  They really should not be.  The kernel is officially
>>
>> Really no. Old products would still be using Linux-3.18 kernel without
>> kernel upgrade. For new product, most of SoC vendors will use
>> Linux-4.x including us.
>> Actually, we are preparing for kernel upgrade for some devices even
>> some old devices (to Linux-4.14-LTS) and almost done.
> 
> That is great to hear.
> 
>>> What is keeping you on 3.18.y and not allowing you to move to a newer
>>> kernel version?
>>
>> We also want to move to latest kernel version. However, there is a case that we cannot upgrade the kernel.
>> In case that SoC vendor never share firmwares and relevant data
>> sheets, we cannot upgrade the kernel. However, we have to resolve the
>> security issues for users of this device.
> 
> It sounds like you need to be getting those security updates from those
> SoC vendors, as they are the ones you are paying for support for that

It's true but some open source developers like me who use vendor kernel without vendor's support will never get the security updates from them.
So if you merge CVE patches even through this kernel is already EOL then many open source developers would be glad. :)

Thanks,
Inki Dae

> kernel version that they are forcing you to stay on.
> 
> good luck!
> 
> greg k-h
> 
> 
> 

Re: [PATCH for v3.18 00/18] Backport CVE-2017-13166 fixes to Kernel 3.18

[Mauro Carvalho Chehab]

Em Thu, 29 Mar 2018 08:22:08 +0900
Inki Dae <inki.dae@samsung.com> escreveu:

> Hi Mauro,
> 
> 2018년 03월 29일 03:12에 Mauro Carvalho Chehab 이(가) 쓴 글:
> > Hi Greg,
> > 
> > Those are the backports meant to solve CVE-2017-13166 on Kernel 3.18.
> > 
> > It contains two v4l2-ctrls fixes that are required to avoid crashes
> > at the test application.
> > 
> > I wrote two patches myself for Kernel 3.18 in order to solve some
> > issues specific for Kernel 3.18 with aren't needed upstream.
> > one is actually a one-line change backport. The other one makes
> > sure that both 32-bits and 64-bits version of some ioctl calls
> > will return the same value for a reserved field.
> > 
> > I noticed an extra bug while testing it, but the bug also hits upstream,
> > and should be backported all the way down all stable/LTS versions.
> > So, I'll send it the usual way, after merging upsream.  
> 
> Really thanks for doing this. :) There would be many users who use Linux-3.18 for their products yet.

Anytime!

Please let me know if you find any issues with those backports.

Regards,
Mauro

Re: [PATCH for v3.18 00/18] Backport CVE-2017-13166 fixes to Kernel 3.18

[Greg KH]

On Wed, Mar 28, 2018 at 03:12:19PM -0300, Mauro Carvalho Chehab wrote:
> Hi Greg,
> 
> Those are the backports meant to solve CVE-2017-13166 on Kernel 3.18.
> 
> It contains two v4l2-ctrls fixes that are required to avoid crashes
> at the test application.
> 
> I wrote two patches myself for Kernel 3.18 in order to solve some
> issues specific for Kernel 3.18 with aren't needed upstream.
> one is actually a one-line change backport. The other one makes
> sure that both 32-bits and 64-bits version of some ioctl calls
> will return the same value for a reserved field.
> 
> I noticed an extra bug while testing it, but the bug also hits upstream,
> and should be backported all the way down all stable/LTS versions.
> So, I'll send it the usual way, after merging upsream.

I've queued these all up now, thanks.

greg k-h