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authorEric Dumazet <dada1@cosmosbay.com>2009-04-02 00:53:49 -0700
committerDavid S. Miller <davem@davemloft.net>2009-04-02 00:54:43 -0700
commitfa9a86ddc8ecd2830a5e773facc250f110300ae7 (patch)
treefb7120974ec38932aa909403c2598cbd01353b35 /net
parent8cbd9606a6367c221a7bbcc47f3ab1a8c31b6437 (diff)
downloadlinux-2.6.38-lt-ux500-fa9a86ddc8ecd2830a5e773facc250f110300ae7.tar.gz
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>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/netfilter/arp_tables.c4
-rw-r--r--net/ipv4/netfilter/ip_tables.c4
-rw-r--r--net/ipv6/netfilter/ip6_tables.c4
3 files changed, 6 insertions, 6 deletions
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index 35c5f6a5cb7..5ba533d234d 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -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;
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 82ee7c9049f..810c0b62c7d 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -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;
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index e89cfa3a8f2..dfed176aed3 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;