6.1-stable review patch. If anyone has any objections, please let me know.
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From: Benoit Sevens bsevens@google.com
commit ecf2b43018da9579842c774b7f35dbe11b5c38dd upstream.
This can lead to out of bounds writes since frames of this type were not taken into account when calculating the size of the frames buffer in uvc_parse_streaming.
Fixes: c0efd232929c ("V4L/DVB (8145a): USB Video Class driver") Signed-off-by: Benoit Sevens bsevens@google.com Cc: stable@vger.kernel.org Acked-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Reviewed-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Signed-off-by: Hans Verkuil hverkuil@xs4all.nl Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/media/usb/uvc/uvc_driver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -368,7 +368,7 @@ static int uvc_parse_format(struct uvc_d * Parse the frame descriptors. Only uncompressed, MJPEG and frame * based formats have frame descriptors. */ - while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && + while (ftype && buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && buffer[2] == ftype) { frame = &format->frame[format->nframes]; if (ftype != UVC_VS_FRAME_FRAME_BASED)