From 8af77675624a7dc2d8471f57512eef58d2563bbf Mon Sep 17 00:00:00 2001
From: justwolf <justwolf@noreply.codeberg.org>
Date: Thu, 7 Mar 2024 03:04:51 +0000
Subject: [PATCH] sixel: Handle NULL pointer

When reading /dev/urandom, sixel_add_ar_11() gets triggered, which didn't properly handle the possibility of a NULL pointer, causing the program to segfault.
---
 sixel.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sixel.c b/sixel.c
index 3e13af23..0a01e8b7 100644
--- a/sixel.c
+++ b/sixel.c
@@ -1492,6 +1492,8 @@ sixel_add_ar_11(struct terminal *term, uint32_t *data, int stride, uint32_t colo
     xassert(term->sixel.pos.row < term->sixel.image.height);
     xassert(term->sixel.pan == 1);
 
+    if (data == NULL)
+        return;
     if (sixel & 0x01)
         *data = color;
     data += stride;