Commit fa9a86dd authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller

netfilter: use rcu_read_bh() in ipt_do_table()

Commit 78454473
(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: default avatarRoman Mindalev <r000n@r000n.net>
Signed-off-by: default avatarEric Dumazet <dada1@cosmosbay.com>
Acked-by: default avatarPatrick McHardy <kaber@trash.net>
Acked-by: default avatarStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8cbd9606
......@@ -253,7 +253,7 @@ unsigned int arpt_do_table(struct sk_buff *skb,
indev = in ? in->name : nulldevname;
outdev = out ? out->name : nulldevname;
rcu_read_lock();
rcu_read_lock_bh();
private = rcu_dereference(table->private);
table_base = rcu_dereference(private->entries[smp_processor_id()]);
......@@ -329,7 +329,7 @@ unsigned int arpt_do_table(struct sk_buff *skb,
}
} while (!hotdrop);
rcu_read_unlock();
rcu_read_unlock_bh();
if (hotdrop)
return NF_DROP;
......
......@@ -339,7 +339,7 @@ ipt_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()]);
......@@ -437,7 +437,7 @@ ipt_do_table(struct sk_buff *skb,
}
} while (!hotdrop);
rcu_read_unlock();
rcu_read_unlock_bh();
#ifdef DEBUG_ALLOW_ALL
return NF_ACCEPT;
......
......@@ -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;
......
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