From: Roy Marples <roy@marples.name>
Date: Tue, 3 May 2016 20:25:30 +0000 (+0000)
Subject: Fix a potential memory issue.
X-Git-Tag: v6.11.0~36
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=886c09031b91bf1c1b35387692b29d149fdd5953;p=thirdparty%2Fdhcpcd.git

Fix a potential memory issue.
---

diff --git a/dhcpcd.c b/dhcpcd.c
index 0e207430..3cf67a0c 100644
--- a/dhcpcd.c
+++ b/dhcpcd.c
@@ -1697,7 +1697,8 @@ printpidfile:
 			ifp->ctx = &ctx;
 			TAILQ_INSERT_HEAD(ctx.ifaces, ifp, next);
 			if (family == 0) {
-				if (ctx.pidfile[strlen(ctx.pidfile) - 1] == '6')
+				if (ctx.pidfile[0] != '\0' &&
+				    ctx.pidfile[strlen(ctx.pidfile) - 1] == '6')
 					family = AF_INET6;
 				else
 					family = AF_INET;