From: Natanael Copa <ncopa@alpinelinux.org>
Date: Wed, 25 May 2016 09:22:13 +0000 (+0200)
Subject: in performing dns lookups, check result from res_mkquery
X-Git-Tag: v1.1.15~40
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=04bced403dead13d20a46a1bd00ab1eb2c50b882;p=oweals%2Fmusl.git

in performing dns lookups, check result from res_mkquery

don't send a query that may be malformed.
---

diff --git a/src/network/lookup_name.c b/src/network/lookup_name.c
index 86f90ac1..d3d97b48 100644
--- a/src/network/lookup_name.c
+++ b/src/network/lookup_name.c
@@ -145,11 +145,15 @@ static int name_from_dns(struct address buf[static MAXADDRS], char canon[static
 	if (family != AF_INET6) {
 		qlens[nq] = __res_mkquery(0, name, 1, RR_A, 0, 0, 0,
 			qbuf[nq], sizeof *qbuf);
+		if (qlens[nq] == -1)
+			return EAI_NONAME;
 		nq++;
 	}
 	if (family != AF_INET) {
 		qlens[nq] = __res_mkquery(0, name, 1, RR_AAAA, 0, 0, 0,
 			qbuf[nq], sizeof *qbuf);
+		if (qlens[nq] == -1)
+			return EAI_NONAME;
 		nq++;
 	}