From 0040bb95445e800af80ca9fa1b92f5db33f1b4ac Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Wed, 10 Oct 2007 16:48:12 -0700
Subject: [PATCH] Fix potential use-after-free in XV overlay code on video
 stop.

---
 src/i830_video.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/i830_video.c b/src/i830_video.c
index beec03ea..8c2d804a 100644
--- a/src/i830_video.c
+++ b/src/i830_video.c
@@ -1016,6 +1016,7 @@ I830StopVideo(ScrnInfoPtr pScrn, pointer data, Bool shutdown)
 	 */
 	I830Sync(pScrn);
 	i830_free_memory(pScrn, pPriv->buf);
+	pPriv->buf = NULL;
 	pPriv->videoStatus = 0;
     } else {
 	if (pPriv->videoStatus & CLIENT_VIDEO_ON) {