Patch "sctp: lack the check for ports in sctp_v6_cmp_addr" has been added to the 4.4-stable tree

Patch "sctp: lack the check for ports in sctp_v6_cmp_addr" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    sctp: lack the check for ports in sctp_v6_cmp_addr

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     sctp-lack-the-check-for-ports-in-sctp_v6_cmp_addr.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Sat Apr 16 10:02:53 PDT 2016
From: Xin Long <lucien.xin@gmail.com>
Date: Sun, 28 Feb 2016 10:03:51 +0800
Subject: sctp: lack the check for ports in sctp_v6_cmp_addr

From: Xin Long <lucien.xin@gmail.com>

[ Upstream commit 40b4f0fd74e46c017814618d67ec9127ff20f157 ]

As the member .cmp_addr of sctp_af_inet6, sctp_v6_cmp_addr should also check
the port of addresses, just like sctp_v4_cmp_addr, cause it's invoked by
sctp_cmp_addr_exact().

Now sctp_v6_cmp_addr just check the port when two addresses have different
family, and lack the port check for two ipv6 addresses. that will make
sctp_hash_cmp() cannot work well.

so fix it by adding ports comparison in sctp_v6_cmp_addr().

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/sctp/ipv6.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -526,6 +526,8 @@ static int sctp_v6_cmp_addr(const union
 		}
 		return 0;
 	}
+	if (addr1->v6.sin6_port != addr2->v6.sin6_port)
+		return 0;
 	if (!ipv6_addr_equal(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr))
 		return 0;
 	/* If this is a linklocal address, compare the scope_id. */


Patches currently in stable-queue which might be from lucien.xin@gmail.com are

queue-4.4/sctp-lack-the-check-for-ports-in-sctp_v6_cmp_addr.patch