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

netfilter: arp_tables: fix invoking 32bit "iptable -P INPUT ACCEPT" failed in 64bit kernel

to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: netfilter-arp_tables-fix-invoking-32bit-iptable-p-input-accept-failed-in-64bit-kernel.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@vger.kernel.org know about it.

From 17a49cd549d9dc8707dc9262210166455c612dde Mon Sep 17 00:00:00 2001

From: Hongxu Jia hongxu.jia@windriver.com Date: Tue, 29 Nov 2016 21:56:26 -0500 Subject: netfilter: arp_tables: fix invoking 32bit "iptable -P INPUT ACCEPT" failed in 64bit kernel

From: Hongxu Jia hongxu.jia@windriver.com

commit 17a49cd549d9dc8707dc9262210166455c612dde upstream.

Since 09d9686047db ("netfilter: x_tables: do compat validation via translate_table"), it used compatr structure to assign newinfo structure. In translate_compat_table of ip_tables.c and ip6_tables.c, it used compatr->hook_entry to replace info->hook_entry and compatr->underflow to replace info->underflow, but not do the same replacement in arp_tables.c.

It caused invoking 32-bit "arptbale -P INPUT ACCEPT" failed in 64bit kernel. -------------------------------------- root@qemux86-64:~# arptables -P INPUT ACCEPT root@qemux86-64:~# arptables -P INPUT ACCEPT ERROR: Policy for `INPUT' offset 448 != underflow 0 arptables: Incompatible with this kernel --------------------------------------

Fixes: 09d9686047db ("netfilter: x_tables: do compat validation via translate_table") Signed-off-by: Hongxu Jia hongxu.jia@windriver.com Acked-by: Florian Westphal fw@strlen.de Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Acked-by: Michal Kubecek mkubecek@suse.cz Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- net/ipv4/netfilter/arp_tables.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/ipv4/netfilter/arp_tables.c +++ b/net/ipv4/netfilter/arp_tables.c @@ -1339,8 +1339,8 @@ static int translate_compat_table(struct

newinfo->number = compatr->num_entries; for (i = 0; i < NF_ARP_NUMHOOKS; i++) { - newinfo->hook_entry[i] = info->hook_entry[i]; - newinfo->underflow[i] = info->underflow[i]; + newinfo->hook_entry[i] = compatr->hook_entry[i]; + newinfo->underflow[i] = compatr->underflow[i]; } entry1 = newinfo->entries; pos = entry1;

Patches currently in stable-queue which might be from hongxu.jia@windriver.com are

queue-4.4/netfilter-arp_tables-fix-invoking-32bit-iptable-p-input-accept-failed-in-64bit-kernel.patch