From 04bced403dead13d20a46a1bd00ab1eb2c50b882 Mon Sep 17 00:00:00 2001 From: Natanael Copa Date: Wed, 25 May 2016 11:22:13 +0200 Subject: [PATCH] in performing dns lookups, check result from res_mkquery don't send a query that may be malformed. --- src/network/lookup_name.c | 4 ++++ 1 file changed, 4 insertions(+) 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++; } -- 2.25.1