From 3fa832fd9d5096cf155fa91127058d69f176362d Mon Sep 17 00:00:00 2001
From: Sven Verdoolaege <skimo@kotnet.org>
Date: Tue, 4 Jun 2013 14:27:57 +0200
Subject: [PATCH] isl_tab_pip.c: context_gbr_save: avoid invalid access on
 error path

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
---
 isl_tab_pip.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/isl_tab_pip.c b/isl_tab_pip.c
index 6d8496e1..7fb34c7f 100644
--- 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;
-- 
2.11.4.GIT