isl_tab_pip.c: context_gbr_save: avoid invalid access on error path

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>

diff --git a/isl_tab_pip.c b/isl_tab_pip.c
index 6d8496e..7fb34c7 100644 (file)
--- a/isl_tab_pip.c
+++ b/isl_tab_pip.c
@@ -3222,6 +3222,9 @@ static void *context_gbr_save(struct isl_context *context)
        struct isl_context_gbr *cgbr = (struct isl_context_gbr *)context;
        struct isl_gbr_tab_undo *snap;
 
+       if (!cgbr->tab)
+               return NULL;
+
        snap = isl_alloc_type(cgbr->tab->mat->ctx, struct isl_gbr_tab_undo);
        if (!snap)
                return NULL;