* [PATCH] ubifs: reject unsupported ioctl flags explicitly
@ 2019-02-09 8:54 Hou Tao
2019-02-13 6:50 ` Hou Tao
2019-02-14 7:43 ` Richard Weinberger
0 siblings, 2 replies; 4+ messages in thread
From: Hou Tao @ 2019-02-09 8:54 UTC (permalink / raw)
To: linux-mtd; +Cc: richard, houtao1, adrian.hunter, dedekind1
Reject unsupported ioctl flags explicitly, so the following command
on a regular ubifs file will fail:
chattr +d ubifs_file
And xfstests generic/424 will pass.
Signed-off-by: Hou Tao <houtao1@huawei.com>
---
fs/ubifs/ioctl.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c
index 0164bcc827f8..daf9f93e15de 100644
--- a/fs/ubifs/ioctl.c
+++ b/fs/ubifs/ioctl.c
@@ -28,6 +28,11 @@
#include <linux/mount.h>
#include "ubifs.h"
+/* Need to be kept consistent with checked flags in ioctl2ubifs() */
+#define UBIFS_SUPPORTED_IOCTL_FLAGS \
+ (FS_COMPR_FL | FS_SYNC_FL | FS_APPEND_FL | \
+ FS_IMMUTABLE_FL | FS_DIRSYNC_FL)
+
/**
* ubifs_set_inode_flags - set VFS inode flags.
* @inode: VFS inode to set flags for
@@ -169,6 +174,9 @@ long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
if (get_user(flags, (int __user *) arg))
return -EFAULT;
+ if (flags & ~UBIFS_SUPPORTED_IOCTL_FLAGS)
+ return -EOPNOTSUPP;
+
if (!S_ISDIR(inode->i_mode))
flags &= ~FS_DIRSYNC_FL;
--
2.16.2.dirty
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] ubifs: reject unsupported ioctl flags explicitly
2019-02-09 8:54 [PATCH] ubifs: reject unsupported ioctl flags explicitly Hou Tao
@ 2019-02-13 6:50 ` Hou Tao
2019-02-13 9:37 ` Richard Weinberger
2019-02-14 7:43 ` Richard Weinberger
1 sibling, 1 reply; 4+ messages in thread
From: Hou Tao @ 2019-02-13 6:50 UTC (permalink / raw)
To: linux-mtd; +Cc: richard, adrian.hunter, dedekind1
ping ?
On 2019/2/9 16:54, Hou Tao wrote:
> Reject unsupported ioctl flags explicitly, so the following command
> on a regular ubifs file will fail:
> chattr +d ubifs_file
>
> And xfstests generic/424 will pass.
>
> Signed-off-by: Hou Tao <houtao1@huawei.com>
> ---
> fs/ubifs/ioctl.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c
> index 0164bcc827f8..daf9f93e15de 100644
> --- a/fs/ubifs/ioctl.c
> +++ b/fs/ubifs/ioctl.c
> @@ -28,6 +28,11 @@
> #include <linux/mount.h>
> #include "ubifs.h"
>
> +/* Need to be kept consistent with checked flags in ioctl2ubifs() */
> +#define UBIFS_SUPPORTED_IOCTL_FLAGS \
> + (FS_COMPR_FL | FS_SYNC_FL | FS_APPEND_FL | \
> + FS_IMMUTABLE_FL | FS_DIRSYNC_FL)
> +
> /**
> * ubifs_set_inode_flags - set VFS inode flags.
> * @inode: VFS inode to set flags for
> @@ -169,6 +174,9 @@ long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> if (get_user(flags, (int __user *) arg))
> return -EFAULT;
>
> + if (flags & ~UBIFS_SUPPORTED_IOCTL_FLAGS)
> + return -EOPNOTSUPP;
> +
> if (!S_ISDIR(inode->i_mode))
> flags &= ~FS_DIRSYNC_FL;
>
>
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] ubifs: reject unsupported ioctl flags explicitly
2019-02-09 8:54 [PATCH] ubifs: reject unsupported ioctl flags explicitly Hou Tao
2019-02-13 6:50 ` Hou Tao
@ 2019-02-14 7:43 ` Richard Weinberger
1 sibling, 0 replies; 4+ messages in thread
From: Richard Weinberger @ 2019-02-14 7:43 UTC (permalink / raw)
To: Hou Tao; +Cc: linux-mtd, adrian.hunter, dedekind1
Am Samstag, 9. Februar 2019, 09:54:20 CET schrieb Hou Tao:
> Reject unsupported ioctl flags explicitly, so the following command
> on a regular ubifs file will fail:
> chattr +d ubifs_file
>
> And xfstests generic/424 will pass.
>
> Signed-off-by: Hou Tao <houtao1@huawei.com>
> ---
> fs/ubifs/ioctl.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c
> index 0164bcc827f8..daf9f93e15de 100644
> --- a/fs/ubifs/ioctl.c
> +++ b/fs/ubifs/ioctl.c
> @@ -28,6 +28,11 @@
> #include <linux/mount.h>
> #include "ubifs.h"
>
> +/* Need to be kept consistent with checked flags in ioctl2ubifs() */
> +#define UBIFS_SUPPORTED_IOCTL_FLAGS \
> + (FS_COMPR_FL | FS_SYNC_FL | FS_APPEND_FL | \
> + FS_IMMUTABLE_FL | FS_DIRSYNC_FL)
> +
> /**
> * ubifs_set_inode_flags - set VFS inode flags.
> * @inode: VFS inode to set flags for
> @@ -169,6 +174,9 @@ long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> if (get_user(flags, (int __user *) arg))
> return -EFAULT;
>
> + if (flags & ~UBIFS_SUPPORTED_IOCTL_FLAGS)
> + return -EOPNOTSUPP;
> +
> if (!S_ISDIR(inode->i_mode))
> flags &= ~FS_DIRSYNC_FL;
>
>
Makes sense, will queue for the next merge window. :-)
Thanks,
//richard
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2019-02-09 8:54 [PATCH] ubifs: reject unsupported ioctl flags explicitly Hou Tao
2019-02-13 6:50 ` Hou Tao
2019-02-13 9:37 ` Richard Weinberger
2019-02-14 7:43 ` Richard Weinberger
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