From: Rich Felker <dalias@aerifal.cx>
Date: Wed, 27 Nov 2013 05:54:03 +0000 (-0500)
Subject: reject invalid address families in getaddrinfo
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=cabe9aa974aca34c0fda91028c770dee96ba51dc;p=musl

reject invalid address families in getaddrinfo

subsequent code assumes the address family requested is either
unspecified or one of IPv4/IPv6, and could malfunction if this
constraint is not met, so other address families should be explicitly
rejected.
---

diff --git a/src/network/getaddrinfo.c b/src/network/getaddrinfo.c
index e58db6cf..5d45be74 100644
--- a/src/network/getaddrinfo.c
+++ b/src/network/getaddrinfo.c
@@ -62,6 +62,9 @@ int getaddrinfo(const char *restrict host, const char *restrict serv, const stru
 	int result;
 	int cnt;
 
+	if (family != AF_INET && family != AF_INET6 && family != AF_UNSPEC)
+		return EAI_FAMILY;
+
 	if (host && strlen(host)>255) return EAI_NONAME;
 	if (serv && strlen(serv)>32) return EAI_SERVICE;