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V4L/DVB (8207): uvcvideo: Fix a buffer overflow in format descriptor parsing

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Thanks to Oliver Neukum for catching and reporting this bug.

Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Laurent Pinchart 2008-07-04 00:34:59 -03:00 committed by Mauro Carvalho Chehab
parent 553b9fa47d
commit 233548a2fd
1 changed files with 2 additions and 1 deletions
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3
drivers/media/video/uvc/uvc_driver.c
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@ -298,7 +298,8 @@ static int uvc_parse_format(struct uvc_device *dev,
switch (buffer[2]) {
case VS_FORMAT_UNCOMPRESSED:
case VS_FORMAT_FRAME_BASED:
if (buflen < 27) {
n = buffer[2] == VS_FORMAT_UNCOMPRESSED ? 27 : 28;
if (buflen < n) {
uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming"
"interface %d FORMAT error\n",
dev->udev->devnum,