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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2014-04-14 10:49:34 -0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-06-07 13:25:40 -0700
commit2e008074b2f19ba550393e3a33334fd1dd5da082 (patch)
treee56382a0da889bde5dd4e1d28c22fd67ea5a180e
parent4f792a2972e6f320484abfc940f978177131facc (diff)
downloadlinux-linaro-stable-2e008074b2f19ba550393e3a33334fd1dd5da082.tar.gz
media: V4L2: ov7670: fix a wrong index, potentially Oopsing the kernel from user-space
commit cfece5857ca51d1dcdb157017aba226f594e9dcf upstream. 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@gmx.de> Acked-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/media/i2c/ov7670.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c
index 617ad3fff4aa..3ead3a83f04a 100644
--- a/drivers/media/i2c/ov7670.c
+++ b/drivers/media/i2c/ov7670.c
@@ -1110,7 +1110,7 @@ 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)