virgl: fix null pointer exceptions

diff --git a/src/gallium/winsys/virgl/drm/virgl_drm_winsys.c b/src/gallium/winsys/virgl/drm/virgl_drm_winsys.c
index 86e0470..f73d2a9 100644 (file)
--- a/src/gallium/winsys/virgl/drm/virgl_drm_winsys.c
+++ b/src/gallium/winsys/virgl/drm/virgl_drm_winsys.c
@@ -585,6 +585,7 @@ static void virgl_drm_cmd_buf_destroy(struct virgl_cmd_buf *_cbuf)
 static boolean virgl_drm_lookup_res(struct virgl_drm_cmd_buf *cbuf,
                                     struct virgl_hw_res *res)
 {
+   if (!res) return false;
    unsigned hash = res->res_handle & (sizeof(cbuf->is_handle_added)-1);
    int i;
 
@@ -607,6 +608,7 @@ static void virgl_drm_add_res(struct virgl_drm_winsys *qdws,
                               struct virgl_drm_cmd_buf *cbuf,
                               struct virgl_hw_res *res)
 {
+   if (!res) return;
    unsigned hash = res->res_handle & (sizeof(cbuf->is_handle_added)-1);
 
    if (cbuf->cres > cbuf->nres) {