From 6f568da64e625a1e517de6147058888515a0ccb7 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Tue, 11 Sep 2012 17:11:44 +0200
Subject: lib9/p9dialparse: fix segfault on gethostbyname

In some situations, gethostbyname can
return an empty address list.

R=rsc
http://codereview.appspot.com/6443097
---
 src/lib9/_p9dialparse.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/lib9/_p9dialparse.c b/src/lib9/_p9dialparse.c
index 4ff4d3cc..2cc23574 100644
--- a/src/lib9/_p9dialparse.c
+++ b/src/lib9/_p9dialparse.c
@@ -109,7 +109,7 @@ p9dialparse(char *addr, char **pnet, char **punix, void *phost, int *pport)
 	if(strcmp(host, "*") == 0){
 		ss->ss_family = AF_INET6;
 		((struct sockaddr_in6*)ss)->sin6_addr = in6addr_any;
-	}else if((he = gethostbyname(host)) != nil){
+	}else if((he = gethostbyname(host)) != nil && he->h_addr_list[0] != nil){
 		ss->ss_family = he->h_addrtype;
 		switch(ss->ss_family){
 		case AF_INET:
-- 
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