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authorRalph Loader <suckfish@ihug.co.nz>2008-09-22 21:06:48 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-10-04 23:04:32 -0300
commitfe6c700ff34e68e1eb7991e9c5d18986d0005ac1 (patch)
treefcadc38da2054f3d9b25ad3ceb0d89148adcbdd5 /drivers/media/video/uvc
parentbda1cda54b7e1654e9416fec76e6342847b25216 (diff)
V4L/DVB (9053): fix buffer overflow in uvc-video
There is a buffer overflow in drivers/media/video/uvc/uvc_ctrl.c: INFO: 0xf2c5ce08-0xf2c5ce0b. First byte 0xa1 instead of 0xcc INFO: Allocated in uvc_query_v4l2_ctrl+0x3c/0x239 [uvcvideo] age=13 cpu=1 pid=4975 ... A fixed size 8-byte buffer is allocated, and a variable size field is read into it; there is no particular bound on the size of the field (it is dependent on hardware and configuration) and it can overflow [also verified by inserting printk's.] The patch attempts to size the buffer to the correctly. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/uvc')
-rw-r--r--drivers/media/video/uvc/uvc_ctrl.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c
index 6ef3e5297de..feab12aa2c7 100644
--- a/drivers/media/video/uvc/uvc_ctrl.c
+++ b/drivers/media/video/uvc/uvc_ctrl.c
@@ -592,7 +592,7 @@ int uvc_query_v4l2_ctrl(struct uvc_video_device *video,
if (ctrl == NULL)
return -EINVAL;
- data = kmalloc(8, GFP_KERNEL);
+ data = kmalloc(ctrl->info->size, GFP_KERNEL);
if (data == NULL)
return -ENOMEM;