From fde4d8a2bb5c0cef4d3ed7c2c1c33f945c5a1021 Mon Sep 17 00:00:00 2001
From: Leonardo Alminana <leonardo@calyptia.com>
Date: Mon, 24 Apr 2023 15:56:59 +0200
Subject: [PATCH] sds: fix off by 1 bug in flb_sds_printf

Note: this is a port of Wesleys fix in fluent-bit

Signed-off-by: Leonardo Alminana <leonardo@calyptia.com>
---
 src/cfl_sds.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/cfl_sds.c b/src/cfl_sds.c
index 80048c9..2d886bc 100644
--- a/src/cfl_sds.c
+++ b/src/cfl_sds.c
@@ -211,8 +211,8 @@ cfl_sds_t cfl_sds_printf(cfl_sds_t *sds, const char *fmt, ...)
     }
     va_end(ap);
 
-    if (size > cfl_sds_avail(s)) {
-        tmp = cfl_sds_increase(s, size);
+    if (size >= cfl_sds_avail(s)) {
+        tmp = cfl_sds_increase(s, size - flb_sds_avail(s) + 1);
         if (!tmp) {
             return NULL;
         }