netfilter: use rcu_read_bh() in ipt_do_table()

Commit 784544739a25c30637397ace5489eeb6e15d7d49
(netfilter: iptables: lock free counters) forgot to disable BH
in arpt_do_table(), ipt_do_table() and  ip6t_do_table()

Use rcu_read_lock_bh() instead of rcu_read_lock() cures the problem.

Reported-and-bisected-by: Roman Mindalev <r000n@r000n.net>
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Acked-by: Patrick McHardy <kaber@trash.net>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index e89cfa3a8f25..dfed176aed37 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -365,7 +365,7 @@ ip6t_do_table(struct sk_buff *skb,
 
         IP_NF_ASSERT(table->valid_hooks & (1 << hook));
 
-        rcu_read_lock();
+        rcu_read_lock_bh();
         private = rcu_dereference(table->private);
         table_base = rcu_dereference(private->entries[smp_processor_id()]);
 
@@ -466,7 +466,7 @@ ip6t_do_table(struct sk_buff *skb,
 #ifdef CONFIG_NETFILTER_DEBUG
         ((struct ip6t_entry *)table_base)->comefrom = NETFILTER_LINK_POISON;
 #endif
-        rcu_read_unlock();
+        rcu_read_unlock_bh();
 
 #ifdef DEBUG_ALLOW_ALL
         return NF_ACCEPT;