From c8af7ce35a900ac9b898f51c1b95dabad3ba1d76 Mon Sep 17 00:00:00 2001
From: Paulo Cesar Pereira de Andrade <pcpa@mandriva.com.br>
Date: Fri, 23 May 2008 13:50:39 -0300
Subject: [PATCH] Correct a NULL pointer deference

  The problem happens if Monitor/Card combo doesn't provide EDID info,
and the XFree86-VidModeExtension extension is used.

Signed-off-by: Peter Hutterer <peter@cs.unisa.edu.au>
---
 hw/xfree86/common/xf86VidMode.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/hw/xfree86/common/xf86VidMode.c b/hw/xfree86/common/xf86VidMode.c
index 38d605c88..9260bb57b 100644
--- a/hw/xfree86/common/xf86VidMode.c
+++ b/hw/xfree86/common/xf86VidMode.c
@@ -150,10 +150,14 @@ VidModeGetCurrentModeline(int scrnIndex, pointer *mode, int *dotClock)
 	return FALSE;
 
     pScrn = xf86Screens[scrnIndex];
-    *mode = (pointer)(pScrn->currentMode);
-    *dotClock = pScrn->currentMode->Clock;
 
-    return TRUE;
+    if (pScrn->currentMode) {
+	*mode = (pointer)(pScrn->currentMode);
+	*dotClock = pScrn->currentMode->Clock;
+
+	return TRUE;
+    }
+    return FALSE;
 }
 
 _X_EXPORT int