Commit 4e768c8e authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

media: v4l2-compat-ioctl32.c: zero buffer passed to v4l2_compat_get_array_args() 



The v4l2_compat_get_array_args() function can leave uninitialized memory in the
buffer it is passed. So zero it before copying array elements from userspace
into the buffer.

Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: default avatar <syzbot+ff18193ff05f3f87f226@syzkaller.appspotmail.com>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent 150f7b11

drivers/media/v4l2-core/v4l2-compat-ioctl32.c

+2 −0
Original line number Diff line number Diff line
@@ -1040,6 +1040,8 @@ int v4l2_compat_get_array_args(struct file *file, void *mbuf, 
{

	int err = 0;



	memset(mbuf, 0, array_size);



	switch (cmd) {

	case VIDIOC_G_FMT32:

	case VIDIOC_S_FMT32: