From 183d71d215038f094f46aa8e497e1b95b00e8789 Mon Sep 17 00:00:00 2001
From: Tobias Stoeckmann <tobias@stoeckmann.org>
Date: Fri, 18 Jul 2025 23:27:28 +0200
Subject: [PATCH] gbacktrace: Fix OOB write in stack_trace

The array buffer is of size BUFSIZE. The if-check correctly avoids
writing characters into the buffer, but the ending newline may still
overflow buffer. Keep space for the EOL character.
---
 glib/gbacktrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/glib/gbacktrace.c b/glib/gbacktrace.c
index 713065914..19923ae76 100644
--- a/glib/gbacktrace.c
+++ b/glib/gbacktrace.c
@@ -497,7 +497,7 @@ stack_trace (const char * const *args)
                     }
                   break;
                 case 1:
-                  if (idx < BUFSIZE)
+                  if (idx < BUFSIZE - 1)
                     buffer[idx++] = c;
                   if ((c == '\n') || (c == '\r'))
                     {