Patch "ipv6/udp: use sticky pktinfo egress ifindex on connect()" has been added to the 4.4-stable tree

Patch "ipv6/udp: use sticky pktinfo egress ifindex on connect()" 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

    ipv6/udp: use sticky pktinfo egress ifindex on connect()

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:
     ipv6-udp-use-sticky-pktinfo-egress-ifindex-on-connect.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 Mon Feb 29 14:33:50 PST 2016
From: Paolo Abeni <pabeni@redhat.com>
Date: Fri, 29 Jan 2016 12:30:20 +0100
Subject: ipv6/udp: use sticky pktinfo egress ifindex on connect()

From: Paolo Abeni <pabeni@redhat.com>

[ Upstream commit 1cdda91871470f15e79375991bd2eddc6e86ddb1 ]

Currently, the egress interface index specified via IPV6_PKTINFO
is ignored by __ip6_datagram_connect(), so that RFC 3542 section 6.7
can be subverted when the user space application calls connect()
before sendmsg().
Fix it by initializing properly flowi6_oif in connect() before
performing the route lookup.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv6/datagram.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -162,6 +162,9 @@ ipv4_connected:
 	fl6.fl6_dport = inet->inet_dport;
 	fl6.fl6_sport = inet->inet_sport;
 
+	if (!fl6.flowi6_oif)
+		fl6.flowi6_oif = np->sticky_pktinfo.ipi6_ifindex;
+
 	if (!fl6.flowi6_oif && (addr_type&IPV6_ADDR_MULTICAST))
 		fl6.flowi6_oif = np->mcast_oif;
 


Patches currently in stable-queue which might be from pabeni@redhat.com are

queue-4.4/ipv6-udp-use-sticky-pktinfo-egress-ifindex-on-connect.patch
queue-4.4/ipv6-enforce-flowi6_oif-usage-in-ip6_dst_lookup_tail.patch
queue-4.4/lwt-fix-rx-checksum-setting-for-lwt-devices-tunneling-over-ipv6.patch