This is a note to let you know that I've just added the patch titled
netfilter: ip6t_NPT: Fix translation for non-multiple of 32 prefix lengths
to the 3.8-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:
netfilter-ip6t_npt-fix-translation-for-non-multiple-of-32-prefix-lengths.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 906b1c394d0906a154fbdc904ca506bceb515756 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@xxxxxxxxxxxxxxxxxxxx>
Date: Sat, 30 Mar 2013 10:23:12 +0000
Subject: netfilter: ip6t_NPT: Fix translation for non-multiple of 32 prefix lengths
From: Matthias Schiffer <mschiffer@xxxxxxxxxxxxxxxxxxxx>
commit 906b1c394d0906a154fbdc904ca506bceb515756 upstream.
The bitmask used for the prefix mangling was being calculated
incorrectly, leading to the wrong part of the address being replaced
when the prefix length wasn't a multiple of 32.
Signed-off-by: Matthias Schiffer <mschiffer@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv6/netfilter/ip6t_NPT.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/ipv6/netfilter/ip6t_NPT.c
+++ b/net/ipv6/netfilter/ip6t_NPT.c
@@ -57,7 +57,7 @@ static bool ip6t_npt_map_pfx(const struc
if (pfx_len - i >= 32)
mask = 0;
else
- mask = htonl(~((1 << (pfx_len - i)) - 1));
+ mask = htonl((1 << (i - pfx_len + 32)) - 1);
idx = i / 32;
addr->s6_addr32[idx] &= mask;
Patches currently in stable-queue which might be from mschiffer@xxxxxxxxxxxxxxxxxxxx are
queue-3.8/netfilter-ip6t_npt-fix-translation-for-non-multiple-of-32-prefix-lengths.patch
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