Since the following commit applied in kernel (https://git.kernel.org/cgit/
linux/kernel/git/torvalds/linux.git/commit/?id=09d9686047dbbe1cf4faa558d3ecc4aae2046054)
--------------------------------------
commit 09d9686047dbbe1cf4faa558d3ecc4aae2046054
Author: Florian Westphal <[email protected]>
Date: Fri Apr 1 14:17:34 2016 +0200
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
--------------------------------------
Signed-off-by: Hongxu Jia <[email protected]>
---
net/ipv4/netfilter/arp_tables.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index b31df59..6975384 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -1201,8 +1201,8 @@ static int translate_compat_table(struct xt_table_info
**pinfo,
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;
--
2.8.1
--
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