[3.19.y-ckt stable] Patch "ipv6/udp: use sticky pktinfo egress ifindex on connect()" has been added to the 3.19.y-ckt tree
Kamal Mostafa
kamal at canonical.com
Wed Mar 9 00:27:22 UTC 2016
This is a note to let you know that I have just added a patch titled
ipv6/udp: use sticky pktinfo egress ifindex on connect()
to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue
This patch is scheduled to be released in version 3.19.8-ckt16.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Kamal
---8<------------------------------------------------------------
>From d5e5d70843e932b8228446316ec7f960a7a25f15 Mon Sep 17 00:00:00 2001
From: Paolo Abeni <pabeni at redhat.com>
Date: Fri, 29 Jan 2016 12:30:20 +0100
Subject: ipv6/udp: use sticky pktinfo egress ifindex on connect()
[ 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 at redhat.com>
Acked-by: Hannes Frederic Sowa <hannes at stressinduktion.org>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
net/ipv6/datagram.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 31fb5da..da71cd7 100644
--- 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;
--
2.7.0
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