Patch "ipv6: Inhibit IPv4-mapped src address on the wire." has been added to the 3.18-stable tree

Patch "ipv6: Inhibit IPv4-mapped src address on the wire." has been added to the 3.18-stable tree

[gregkh]

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

    ipv6: Inhibit IPv4-mapped src address on the wire.

to the 3.18-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-inhibit-ipv4-mapped-src-address-on-the-wire.patch
and it can be found in the queue-3.18 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 Thu Jun 15 09:38:54 CEST 2017
From: "Jonathan T. Leighton" <jtleight@udel.edu>
Date: Tue, 23 May 2017 21:53:34 -0400
Subject: ipv6: Inhibit IPv4-mapped src address on the wire.

From: "Jonathan T. Leighton" <jtleight@udel.edu>


[ Upstream commit ec5e3b0a1d41fbda0cc33a45bc9e54e91d9d12c7 ]

This patch adds a check for the problematic case of an IPv4-mapped IPv6
source address and a destination address that is neither an IPv4-mapped
IPv6 address nor in6addr_any, and returns an appropriate error. The
check in done before returning from looking up the route.

Signed-off-by: Jonathan T. Leighton <jtleight@udel.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv6/ip6_output.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -960,6 +960,9 @@ static int ip6_dst_lookup_tail(struct so
 		}
 	}
 #endif
+	if (ipv6_addr_v4mapped(&fl6->saddr) &&
+	    !(ipv6_addr_v4mapped(&fl6->daddr) || ipv6_addr_any(&fl6->daddr)))
+		return -EAFNOSUPPORT;
 
 	return 0;
 


Patches currently in stable-queue which might be from jtleight@udel.edu are

queue-3.18/ipv6-inhibit-ipv4-mapped-src-address-on-the-wire.patch
queue-3.18/ipv6-handle-ipv4-mapped-src-to-in6addr_any-dst.patch