[PATCH 3.16.y-ckt 053/126] ipv6: sctp: implement sctp_v6_destroy_sock()

From	Luis Henriques <luis.henriques@canonical.com>
Newsgroups	linux.kernel
Subject	[PATCH 3.16.y-ckt 053/126] ipv6: sctp: implement sctp_v6_destroy_sock()
Date	2016-01-06 12:10 +0100
Message-ID	<qNU8x-jS-3@gated-at.bofh.it> (permalink)
References	<qNTFw-8jf-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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3.16.7-ckt22 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eric Dumazet <edumazet@google.com>

commit 602dd62dfbda3e63a2d6a3cbde953ebe82bf5087 upstream.

Dmitry Vyukov reported a memory leak using IPV6 SCTP sockets.

We need to call inet6_destroy_sock() to properly release
inet6 specific fields.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 net/sctp/socket.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 16991386baa3..a8fd2f57af97 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -7179,6 +7179,13 @@ struct proto sctp_prot = {
 
 #if IS_ENABLED(CONFIG_IPV6)
 
+#include <net/transp_v6.h>
+static void sctp_v6_destroy_sock(struct sock *sk)
+{
+	sctp_destroy_sock(sk);
+	inet6_destroy_sock(sk);
+}
+
 struct proto sctpv6_prot = {
 	.name		= "SCTPv6",
 	.owner		= THIS_MODULE,
@@ -7188,7 +7195,7 @@ struct proto sctpv6_prot = {
 	.accept		= sctp_accept,
 	.ioctl		= sctp_ioctl,
 	.init		= sctp_init_sock,
-	.destroy	= sctp_destroy_sock,
+	.destroy	= sctp_v6_destroy_sock,
 	.shutdown	= sctp_shutdown,
 	.setsockopt	= sctp_setsockopt,
 	.getsockopt	= sctp_getsockopt,
--
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[PATCH 3.16.y-ckt 053/126] ipv6: sctp: implement sctp_v6_destroy_sock() Luis Henriques <luis.henriques@canonical.com> - 2016-01-06 12:10 +0100

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