From 791783197afe1a8f529f42998e9676cf07f78c96 Mon Sep 17 00:00:00 2001 From: Benoit Sevens Date: Sat, 7 Dec 2024 11:49:29 +0800 Subject: [PATCH] media: uvcvideo: Skip parsing frames of type UVC_VS_UNDEFINED in uvc_parse_format stable inclusion from stable-v5.10.230 commit faff5bbb2762c44ec7426037b3000e77a11d6773 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IB8G1D CVE: CVE-2024-53104 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=faff5bbb2762c44ec7426037b3000e77a11d6773 -------------------------------- 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 Cc: stable@vger.kernel.org Acked-by: Greg Kroah-Hartman Reviewed-by: Laurent Pinchart Signed-off-by: Hans Verkuil Signed-off-by: Greg Kroah-Hartman Signed-off-by: Zeng Heng --- drivers/media/usb/uvc/uvc_driver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index 38c73cdbef70..24e05b375137 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -575,7 +575,7 @@ static int uvc_parse_format(struct uvc_device *dev, /* 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) -- Gitee