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 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-inhibit-ipv4-mapped-src-address-on-the-wire.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@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Jun 15 09:36:39 CEST 2017
From: "Jonathan T. Leighton" <jtleight@xxxxxxxx>
Date: Tue, 23 May 2017 21:53:34 -0400
Subject: ipv6: Inhibit IPv4-mapped src address on the wire.
From: "Jonathan T. Leighton" <jtleight@xxxxxxxx>
[ 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@xxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv6/ip6_output.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1004,6 +1004,9 @@ static int ip6_dst_lookup_tail(struct ne
}
}
#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@xxxxxxxx are
queue-4.4/ipv6-inhibit-ipv4-mapped-src-address-on-the-wire.patch
queue-4.4/ipv6-handle-ipv4-mapped-src-to-in6addr_any-dst.patch