From 84a7c0b1db1c17d5ded8d3800228a608e1070b40 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Manuel=20Sch=C3=B6lling?= Date: Sat, 7 Jun 2014 23:57:25 +0200 Subject: [PATCH] dns_resolver: assure that dns_query() result is null-terminated MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit dns_query() credulously assumes that keys are null-terminated and returns a copy of a memory block that is off by one. Signed-off-by: Manuel Schölling Signed-off-by: David S. Miller --- net/dns_resolver/dns_query.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/dns_resolver/dns_query.c b/net/dns_resolver/dns_query.c index e7b6d53eef88..6853d22ebc07 100644 --- a/net/dns_resolver/dns_query.c +++ b/net/dns_resolver/dns_query.c @@ -149,7 +149,9 @@ int dns_query(const char *type, const char *name, size_t namelen, if (!*_result) goto put; - memcpy(*_result, upayload->data, len + 1); + memcpy(*_result, upayload->data, len); + *_result[len] = '\0'; + if (_expiry) *_expiry = rkey->expiry; -- 2.30.2