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From: Janusz Krzysztofik <jmkrzyszt@gmail.com>
To: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Hans Verkuil <hverkuil-cisco@xs4all.nl>,
	Sakari Ailus <sakari.ailus@linux.intel.com>,
	linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
	Janusz Krzysztofik <jmkrzyszt@gmail.com>
Subject: [PATCH v5 4/4] media: v4l2-subdev: Verify v4l2_subdev_call() pad config argument
Date: Sun, 12 May 2019 22:15:51 +0200	[thread overview]
Message-ID: <20190512201551.18724-5-jmkrzyszt@gmail.com> (raw)
In-Reply-To: <20190512201551.18724-1-jmkrzyszt@gmail.com>

Extend parameter checks performed by v4l2_subdev_call() with a check for
a non-NULL pad config pointer if V4L2_SUBDEV_FORMAT_TRY format type is
requested so drivers don't need to care.

Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
---
 drivers/media/v4l2-core/v4l2-subdev.c | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 3fc07af26c5b..fc8c308fb060 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -138,20 +138,30 @@ static int check_pad(struct v4l2_subdev *sd, __u32 pad)
 	return 0;
 }
 
+static int check_cfg(__u32 which, struct v4l2_subdev_pad_config *cfg)
+{
+	if (WARN_ON(which == V4L2_SUBDEV_FORMAT_TRY && !cfg))
+		return -EINVAL;
+
+	return 0;
+}
+
 static int check_format(struct v4l2_subdev *sd,
+			struct v4l2_subdev_pad_config *cfg,
 			struct v4l2_subdev_format *format)
 {
 	if (WARN_ON(!format))
 		return -EINVAL;
 
-	return check_which(format->which) ? : check_pad(sd, format->pad);
+	return check_which(format->which) ? : check_pad(sd, format->pad) ? :
+	       check_cfg(format->which, cfg);
 }
 
 static int check_get_fmt(struct v4l2_subdev *sd,
 			 struct v4l2_subdev_pad_config *cfg,
 			 struct v4l2_subdev_format *format)
 {
-	return check_format(sd, format) ? :
+	return check_format(sd, cfg, format) ? :
 	       sd->ops->pad->get_fmt(sd, cfg, format);
 }
 
@@ -159,7 +169,7 @@ static int check_set_fmt(struct v4l2_subdev *sd,
 			 struct v4l2_subdev_pad_config *cfg,
 			 struct v4l2_subdev_format *format)
 {
-	return check_format(sd, format) ? :
+	return check_format(sd, cfg, format) ? :
 	       sd->ops->pad->set_fmt(sd, cfg, format);
 }
 
@@ -171,6 +181,7 @@ static int check_enum_mbus_code(struct v4l2_subdev *sd,
 		return -EINVAL;
 
 	return check_which(code->which) ? : check_pad(sd, code->pad) ? :
+	       check_cfg(code->which, cfg) ? :
 	       sd->ops->pad->enum_mbus_code(sd, cfg, code);
 }
 
@@ -182,6 +193,7 @@ static int check_enum_frame_size(struct v4l2_subdev *sd,
 		return -EINVAL;
 
 	return check_which(fse->which) ? : check_pad(sd, fse->pad) ? :
+	       check_cfg(fse->which, cfg) ? :
 	       sd->ops->pad->enum_frame_size(sd, cfg, fse);
 }
 
@@ -216,23 +228,26 @@ static int check_enum_frame_interval(struct v4l2_subdev *sd,
 		return -EINVAL;
 
 	return check_which(fie->which) ? : check_pad(sd, fie->pad) ? :
+	       check_cfg(fie->which, cfg) ? :
 	       sd->ops->pad->enum_frame_interval(sd, cfg, fie);
 }
 
 static int check_selection(struct v4l2_subdev *sd,
+			   struct v4l2_subdev_pad_config *cfg,
 			   struct v4l2_subdev_selection *sel)
 {
 	if (WARN_ON(!sel))
 		return -EINVAL;
 
-	return check_which(sel->which) ? : check_pad(sd, sel->pad);
+	return check_which(sel->which) ? : check_pad(sd, sel->pad) ? :
+	       check_cfg(sel->which, cfg);
 }
 
 static int check_get_selection(struct v4l2_subdev *sd,
 			       struct v4l2_subdev_pad_config *cfg,
 			       struct v4l2_subdev_selection *sel)
 {
-	return check_selection(sd, sel) ? :
+	return check_selection(sd, cfg, sel) ? :
 	       sd->ops->pad->get_selection(sd, cfg, sel);
 }
 
@@ -240,7 +255,7 @@ static int check_set_selection(struct v4l2_subdev *sd,
 			       struct v4l2_subdev_pad_config *cfg,
 			       struct v4l2_subdev_selection *sel)
 {
-	return check_selection(sd, sel) ? :
+	return check_selection(sd, cfg, sel) ? :
 	       sd->ops->pad->set_selection(sd, cfg, sel);
 }
 
-- 
2.21.0


      parent reply	other threads:[~2019-05-12 20:16 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-12 20:15 [PATCH v5 0/4] media: v4l2-subdev: Verify arguments in v4l2_subdev_call() Janusz Krzysztofik
2019-05-12 20:15 ` [PATCH v5 1/4] " Janusz Krzysztofik
2019-05-14 11:56   ` Hans Verkuil
2019-05-12 20:15 ` [PATCH v5 2/4] media: v4l2-subdev: WARN_ON invalid v4l2_subdev_call() arguments Janusz Krzysztofik
2019-05-14 11:54   ` Hans Verkuil
2019-05-12 20:15 ` [PATCH v5 3/4] media: v4l2-subdev: Verify v4l2_subdev_call() pointer arguments Janusz Krzysztofik
2019-05-12 20:15 ` Janusz Krzysztofik [this message]

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