From 364070b1f2b08d43fb205ec198894a35bec6b2f3 Mon Sep 17 00:00:00 2001
From: Vinson Lee <vlee@vmware.com>
Date: Tue, 24 Nov 2009 00:57:55 -0500
Subject: dri: Fix potential null pointer deference in dri_put_drawable.

---
 src/mesa/drivers/dri/common/dri_util.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'src/mesa')

diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
index e48e10d7c0..439f66a7b8 100644
--- a/src/mesa/drivers/dri/common/dri_util.c
+++ b/src/mesa/drivers/dri/common/dri_util.c
@@ -498,11 +498,11 @@ static void dri_put_drawable(__DRIdrawable *pdp)
 {
     __DRIscreenPrivate *psp;
 
-    pdp->refcount--;
-    if (pdp->refcount)
-	return;
-
     if (pdp) {
+	pdp->refcount--;
+	if (pdp->refcount)
+	    return;
+
 	psp = pdp->driScreenPriv;
         (*psp->DriverAPI.DestroyBuffer)(pdp);
 	if (pdp->pClipRects) {
-- 
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