[git:media_tree/master] [media] V4L2: ov7670: fix a wrong index, potentially Oopsing the kernel from user-space

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Subject: [media] V4L2: ov7670: fix a wrong index, potentially Oopsing the kernel from user-space
Author:  Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
Date:    Mon Apr 14 10:49:34 2014 -0300

Commit 75e2bdad8901a0b599e01a96229be922eef1e488 "ov7670: allow
configuration of image size, clock speed, and I/O method" uses a wrong
index to iterate an array. Apart from being wrong, it also uses an
unchecked value from user-space, which can cause access to unmapped
memory in the kernel, triggered by a normal desktop user with rights to
use V4L2 devices.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
Acked-by: Jonathan Corbet <corbet@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx>

 drivers/media/i2c/ov7670.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

---

http://git.linuxtv.org/media_tree.git?a=commitdiff;h=322e6d19ede96ac6c13a132590c435ff17e0827f

diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index e8a1ce2..cdd7c1b 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -1109,7 +1109,7 @@ static int ov7670_enum_framesizes(struct v4l2_subdev *sd,
 	 * windows that fall outside that.
 	 */
 	for (i = 0; i < n_win_sizes; i++) {
-		struct ov7670_win_size *win = &info->devtype->win_sizes[index];
+		struct ov7670_win_size *win = &info->devtype->win_sizes[i];
 		if (info->min_width && win->width < info->min_width)
 			continue;
 		if (info->min_height && win->height < info->min_height)
--
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