This is a note to let you know that I've just added the patch titled
[media] zr364xx: enforce minimum size when reading header
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
zr364xx-enforce-minimum-size-when-reading-header.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ee0fe833d96793853335844b6d99fb76bd12cbeb Mon Sep 17 00:00:00 2001
From: Alyssa Milburn <amilburn@xxxxxxxx>
Date: Sat, 1 Apr 2017 14:34:08 -0300
Subject: [media] zr364xx: enforce minimum size when reading header
From: Alyssa Milburn <amilburn@xxxxxxxx>
commit ee0fe833d96793853335844b6d99fb76bd12cbeb upstream.
This code copies actual_length-128 bytes from the header, which will
underflow if the received buffer is too small.
Signed-off-by: Alyssa Milburn <amilburn@xxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/media/usb/zr364xx/zr364xx.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/media/usb/zr364xx/zr364xx.c
+++ b/drivers/media/usb/zr364xx/zr364xx.c
@@ -604,6 +604,14 @@ static int zr364xx_read_video_callback(s
ptr = pdest = frm->lpvbits;
if (frm->ulState == ZR364XX_READ_IDLE) {
+ if (purb->actual_length < 128) {
+ /* header incomplete */
+ dev_info(&cam->udev->dev,
+ "%s: buffer (%d bytes) too small to hold jpeg header. Discarding.\n",
+ __func__, purb->actual_length);
+ return -EINVAL;
+ }
+
frm->ulState = ZR364XX_READ_FRAME;
frm->cur_size = 0;
Patches currently in stable-queue which might be from amilburn@xxxxxxxx are
queue-4.9/digitv-limit-messages-to-buffer-size.patch
queue-4.9/ttusb2-limit-messages-to-buffer-size.patch
queue-4.9/zr364xx-enforce-minimum-size-when-reading-header.patch
queue-4.9/dw2102-limit-messages-to-buffer-size.patch