media: vivid: set min width/height to a value > 0

commit 9729d6d282a6d7ce88e64c9119cecdf79edf4e88 upstream.

The capture DV timings capabilities allowed for a minimum width and
height of 0. So passing a timings struct with 0 values is allowed
and will later cause a division by zero.

Ensure that the width and height must be >= 16 to avoid this.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: syzbot+57c3d83d71187054d56f@syzkaller.appspotmail.com
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/media/platform/vivid/vivid-vid-common.c b/drivers/media/platform/vivid/vivid-vid-common.c
index be531ca..2079861 100644 (file)
--- a/drivers/media/platform/vivid/vivid-vid-common.c
+++ b/drivers/media/platform/vivid/vivid-vid-common.c
@@ -21,7 +21,7 @@ const struct v4l2_dv_timings_cap vivid_dv_timings_cap = {
        .type = V4L2_DV_BT_656_1120,
        /* keep this initialization for compatibility with GCC < 4.4.6 */
        .reserved = { 0 },
-       V4L2_INIT_BT_TIMINGS(0, MAX_WIDTH, 0, MAX_HEIGHT, 14000000, 775000000,
+       V4L2_INIT_BT_TIMINGS(16, MAX_WIDTH, 16, MAX_HEIGHT, 14000000, 775000000,
                V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
                V4L2_DV_BT_STD_CVT | V4L2_DV_BT_STD_GTF,
                V4L2_DV_BT_CAP_PROGRESSIVE | V4L2_DV_BT_CAP_INTERLACED)