display: virtio-gpu-3d: check virgl capabilities max_size
commitabd7f08b2353f43274b785db8c7224f082ef4d31
authorPrasad J Pandit <pjp@fedoraproject.org>
Wed, 14 Dec 2016 07:01:56 +0000 (14 12:31 +0530)
committerGerd Hoffmann <kraxel@redhat.com>
Tue, 20 Dec 2016 13:18:39 +0000 (20 14:18 +0100)
treec4cea5bb772ab6e46b3966ca01cb7342a8eb07a7
parent6a928d25b6d8bc3729c3d28326c6db13b9481059
display: virtio-gpu-3d: check virgl capabilities max_size

Virtio GPU device while processing 'VIRTIO_GPU_CMD_GET_CAPSET'
command, retrieves the maximum capabilities size to fill in the
response object. It continues to fill in capabilities even if
retrieved 'max_size' is zero(0), thus resulting in OOB access.
Add check to avoid it.

Reported-by: Zhenhao Hong <zhenhaohong@gmail.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-id: 20161214070156.23368-1-ppandit@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
hw/display/virtio-gpu-3d.c