plan9port

commit 6f568da64e625a1e517de6147058888515a0ccb7
parent d4ccb0a943fb312d949726827d4e4e71e6a7a0bb
Author: David du Colombier <0intro@gmail.com>
Date:   Tue, 11 Sep 2012 17:11:44 +0200

lib9/p9dialparse: fix segfault on gethostbyname

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

R=rsc
http://codereview.appspot.com/6443097

Diffstat:
M
src/lib9/_p9dialparse.c
 | 
2
+-

1 file changed, 1 insertion(+), 1 deletion(-)
diff --git 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: