Commit b7afebcf authored by Li Qiang's avatar Li Qiang Committed by Gerd Hoffmann
Browse files

vhost-user-gpu: fix memory leak while calling 'vg_resource_unref' (CVE-2021-3544)



If the guest trigger following sequences, the attach_backing will be leaked:

	vg_resource_create_2d
	vg_resource_attach_backing
	vg_resource_unref

This patch fix this by freeing 'res->iov' in vg_resource_destroy.

Fixes: CVE-2021-3544
Reported-by: default avatarLi Qiang <liq3ea@163.com>
virtio-gpu fix: 5e8e3c4c

 ("virtio-gpu: fix resource leak
in virgl_cmd_resource_unref")
Reviewed-by: default avatarPrasad J Pandit <pjp@fedoraproject.org>
Signed-off-by: default avatarLi Qiang <liq3ea@163.com>
Reviewed-by: Marc-André Lureau's avatarMarc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210516030403.107723-5-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann's avatarGerd Hoffmann <kraxel@redhat.com>
parent b9f79858
......@@ -400,6 +400,7 @@ vg_resource_destroy(VuGpu *g,
}
vugbm_buffer_destroy(&res->buffer);
g_free(res->iov);
pixman_image_unref(res->image);
QTAILQ_REMOVE(&g->reslist, res, next);
g_free(res);
......
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