The 'res->iov' will be leaked if the guest trigger following sequences:
virgl_cmd_create_resource_2d
virgl_resource_attach_backing
virgl_cmd_resource_unref
This patch fixes this.
Fixes: CVE-2021-3544
Reported-by: Li Qiang <liq3ea@163.com>
virtio-gpu fix:
5e8e3c4c75 ("virtio-gpu: fix resource leak
in virgl_cmd_resource_unref"
Signed-off-by: Li Qiang <liq3ea@163.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <
20210516030403.107723-6-liq3ea@163.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
struct virtio_gpu_ctrl_command *cmd)
{
struct virtio_gpu_resource_unref unref;
+ struct iovec *res_iovs = NULL;
+ int num_iovs = 0;
VUGPU_FILL_CMD(unref);
+ virgl_renderer_resource_detach_iov(unref.resource_id,
+ &res_iovs,
+ &num_iovs);
+ g_free(res_iovs);
+
virgl_renderer_resource_unref(unref.resource_id);
}