From: Eric Dumazet <edumazet@google.com>
Date: Thu, 3 Nov 2016 15:59:46 +0000 (-0700)
Subject: ipv6: dccp: add missing bind_conflict to dccp_ipv6_mapped
X-Git-Tag: v4.8.10~37
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=76b5fee5cfa0ae36ef162196410740e4c92f0a96;p=thirdparty%2Fkernel%2Fstable.git

ipv6: dccp: add missing bind_conflict to dccp_ipv6_mapped

[ Upstream commit 990ff4d84408fc55942ca6644f67e361737b3d8e ]

While fuzzing kernel with syzkaller, Andrey reported a nasty crash
in inet6_bind() caused by DCCP lacking a required method.

Fixes: ab1e0a13d7029 ("[SOCK] proto: Add hashinfo member to struct proto")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index b2a43af967e5b..715e5d1dc1072 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -958,6 +958,7 @@ static const struct inet_connection_sock_af_ops dccp_ipv6_mapped = {
 	.getsockopt	   = ipv6_getsockopt,
 	.addr2sockaddr	   = inet6_csk_addr2sockaddr,
 	.sockaddr_len	   = sizeof(struct sockaddr_in6),
+	.bind_conflict	   = inet6_csk_bind_conflict,
 #ifdef CONFIG_COMPAT
 	.compat_setsockopt = compat_ipv6_setsockopt,
 	.compat_getsockopt = compat_ipv6_getsockopt,