From 149d8cbb2ebdf3cdc3e40abff9ff7eb8c647715a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Scharfe?= <l.s.r@web.de>
Date: Thu, 10 Aug 2017 12:23:45 +0200
Subject: win32: plug memory leak on realloc() failure in syslog()

If realloc() fails then the original buffer is still valid.  Free it
before exiting the function.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 compat/win32/syslog.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/compat/win32/syslog.c b/compat/win32/syslog.c
index 6c7c9b6053..161978d720 100644
--- a/compat/win32/syslog.c
+++ b/compat/win32/syslog.c
@@ -43,8 +43,10 @@ void syslog(int priority, const char *fmt, ...)
 	va_end(ap);
 
 	while ((pos = strstr(str, "%1")) != NULL) {
+		char *oldstr = str;
 		str = realloc(str, st_add(++str_len, 1));
 		if (!str) {
+			free(oldstr);
 			warning_errno("realloc failed");
 			return;
 		}
-- 
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