package/safeclib/0002-vsnprintf_s-Increase-Buffer-Size-by-1.patch

From 79e1445f4b3689526b46121b1218cab802b9ae88 Mon Sep 17 00:00:00 2001
From: Bernd Kuhls <bernd@kuhls.net>
Date: Sat, 10 Jan 2026 12:16:22 +0100
Subject: [PATCH] vsnprintf_s: Increase Buffer Size by 1

Another fix similar to https://github.com/rurban/safeclib/commit/f59a0c8c1b5cf19cd0ed7f9bfb3a1e85f54113d0

In function 'safec_ntoa_format',
    inlined from 'safec_ntoa_long' at str/vsnprintf_s.c:331:12:
str/vsnprintf_s.c:256:24: error: writing 32 bytes into a region of size 0 [-Werror=stringop-overflow=]
  256 |             buf[len++] = '0';
      |             ~~~~~~~~~~~^~~~~
str/vsnprintf_s.c: In function 'safec_ntoa_long':
str/vsnprintf_s.c:312:10: note: at offset 32 into destination object 'buf' of size 32
  312 |     char buf[PRINTF_NTOA_BUFFER_SIZE];
      |          ^~~
In function 'safec_ntoa_format',
    inlined from 'safec_ntoa_long' at str/vsnprintf_s.c:331:12:
str/vsnprintf_s.c:260:24: error: writing 32 bytes into a region of size 0 [-Werror=stringop-overflow=]
  260 |             buf[len++] = '0';
      |             ~~~~~~~~~~~^~~~~
str/vsnprintf_s.c: In function 'safec_ntoa_long':
str/vsnprintf_s.c:312:10: note: at offset 32 into destination object 'buf' of size 32
  312 |     char buf[PRINTF_NTOA_BUFFER_SIZE];
      |          ^~~
cc1: all warnings being treated as errors

Upstream: https://github.com/rurban/safeclib/commit/79e1445f4b3689526b46121b1218cab802b9ae88

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
---
 src/str/vsnprintf_s.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/str/vsnprintf_s.c b/src/str/vsnprintf_s.c
index 0b62c3cb..cf8e866e 100644
--- a/src/str/vsnprintf_s.c
+++ b/src/str/vsnprintf_s.c
@@ -309,7 +309,7 @@ static size_t safec_ntoa_long(out_fct_type out, const char *funcname,
                               unsigned long value, bool negative,
                               unsigned long base, unsigned int prec,
                               unsigned int width, unsigned int flags) {
-    char buf[PRINTF_NTOA_BUFFER_SIZE];
+    char buf[PRINTF_NTOA_BUFFER_SIZE + 1];
     size_t len = 0U;
 
     // no hash for 0 values
-- 
2.47.3