FROMGIT: drm/virtio: Fix use after free in get_capset_info callback.

If a response to virtio_gpu_cmd_get_capset_info takes longer than
five seconds to return, the callback will access freed kernel memory
in vg->capsets.

Bug: 166299146
Signed-off-by: Doug Horn <doughorn@google.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit e219688fc5c3d0d9136f8d29d7e0498388f01440)
Change-Id: I1ab01855152e12dc34c56f9c85d723c8e7f7780c
2 files changed