vhost-user-gpu: fix resource leak in 'vg_resource_create_2d' (CVE-2021-3544)

vhost-user-gpu: fix resource leak in 'vg_resource_create_2d' (CVE-2021-3544)

Call 'vugbm_buffer_destroy' in error path to avoid resource leak.

Fixes: CVE-2021-3544
Reported-by: Li Qiang <liq3ea@163.com>
Reviewed-by: Prasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: Li Qiang <liq3ea@163.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210516030403.107723-3-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 86dd8fac2acc366930a5dc08d3fb1b1e816f4e1e)
Signed-off-by: Michael Roth <michael.roth@amd.com>