This is a note to let you know that I've just added the patch titled
net/ipv6/udp: Fix ipv6 multicast socket filter regression
to the 4.0-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:
net-ipv6-udp-fix-ipv6-multicast-socket-filter-regression.patch
and it can be found in the queue-4.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Sat Jun 13 09:48:35 PDT 2015
From: Henning Rogge <hrogge@xxxxxxxxx>
Date: Mon, 18 May 2015 21:08:49 +0200
Subject: net/ipv6/udp: Fix ipv6 multicast socket filter regression
From: Henning Rogge <hrogge@xxxxxxxxx>
[ Upstream commit 33b4b015e1a1ca7a8fdce40af5e71642a8ea355c ]
Commit <5cf3d46192fc> ("udp: Simplify__udp*_lib_mcast_deliver")
simplified the filter for incoming IPv6 multicast but removed
the check of the local socket address and the UDP destination
address.
This patch restores the filter to prevent sockets bound to a IPv6
multicast IP to receive other UDP traffic link unicast.
Signed-off-by: Henning Rogge <hrogge@xxxxxxxxx>
Fixes: 5cf3d46192fc ("udp: Simplify__udp*_lib_mcast_deliver")
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Acked-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv6/udp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -734,7 +734,9 @@ static bool __udp_v6_is_mcast_sock(struc
(inet->inet_dport && inet->inet_dport != rmt_port) ||
(!ipv6_addr_any(&sk->sk_v6_daddr) &&
!ipv6_addr_equal(&sk->sk_v6_daddr, rmt_addr)) ||
- (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif))
+ (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) ||
+ (!ipv6_addr_any(&sk->sk_v6_rcv_saddr) &&
+ !ipv6_addr_equal(&sk->sk_v6_rcv_saddr, loc_addr)))
return false;
if (!inet6_mc_check(sk, loc_addr, rmt_addr))
return false;
Patches currently in stable-queue which might be from hrogge@xxxxxxxxx are
queue-4.0/net-ipv6-udp-fix-ipv6-multicast-socket-filter-regression.patch
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