From: Guus Sliepen <guus@tinc-vpn.org>
Date: Tue, 31 Jan 2017 11:03:27 +0000 (+0100)
Subject: Fix potential segfault in the replacement vasprintf() function.
X-Git-Tag: release-1.1pre15~48
X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=commitdiff_plain;h=88d158e15b9e16b4227b374d8bb4640010670cef

Fix potential segfault in the replacement vasprintf() function.
---

diff --git a/src/dropin.c b/src/dropin.c
index c7b558a4..a4f7a65d 100644
--- a/src/dropin.c
+++ b/src/dropin.c
@@ -106,14 +106,13 @@ int vasprintf(char **buf, const char *fmt, va_list ap) {
 
 	va_copy(aq, ap);
 	status = vsnprintf(*buf, len, fmt, aq);
-	buf[len - 1] = 0;
 	va_end(aq);
 
 	if(status >= 0)
 		*buf = xrealloc(*buf, status + 1);
 
 	if(status > len - 1) {
-		len = status;
+		len = status + 1;
 		va_copy(aq, ap);
 		status = vsnprintf(*buf, len, fmt, aq);
 		va_end(aq);