From 567898f17df1dd03685dd276dc72fb6d9f0dab88 Mon Sep 17 00:00:00 2001
From: "Enrico Weigelt, metux IT consult" <info@metux.net>
Date: Wed, 7 May 2025 14:52:06 +0200
Subject: [PATCH] xfree86: ddc: safety check for NULL pointer

Even though it *should* never be actually hit, it's still safer
to check for NULL instead of letting us crash with segfault.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
---
 hw/xfree86/ddc/ddc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/xfree86/ddc/ddc.c b/hw/xfree86/ddc/ddc.c
index effeff6fc..f075aebd4 100644
--- a/hw/xfree86/ddc/ddc.c
+++ b/hw/xfree86/ddc/ddc.c
@@ -45,6 +45,9 @@ find_start(unsigned int *ptr)
     unsigned int comp[9], test[9];
     int i, j;
 
+    if (!ptr)
+        return -1;
+
     for (i = 0; i < 9; i++) {
         comp[i] = *(ptr++);
         test[i] = 1;