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authorPatrick McHardy <kaber@trash.net>2007-02-12 11:09:19 -0800
committerDavid S. Miller <davem@davemloft.net>2007-02-12 11:09:19 -0800
commitc3a47ab3e5ad62601449e4e5401352271b777e28 (patch)
tree3b3f6810796367efa5f76209aed12bec6c6a8b17 /net/ipv4
parentebaf0c6032f525ddb0158fb59848d41899dce8cd (diff)
[NETFILTER]: Properly use RCU in nf_ct_attach
Use rcu_assign_pointer/rcu_dereference for ip_ct_attach pointer instead of self-made RCU and use rcu_read_lock to make sure the conntrack module doesn't disappear below us while calling it, since this function can be called from outside the netfilter hooks. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/netfilter/ip_conntrack_core.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/netfilter/ip_conntrack_core.c b/net/ipv4/netfilter/ip_conntrack_core.c
index 04e466d53c0b..508e6007a191 100644
--- a/net/ipv4/netfilter/ip_conntrack_core.c
+++ b/net/ipv4/netfilter/ip_conntrack_core.c
@@ -1354,7 +1354,7 @@ static void free_conntrack_hash(struct list_head *hash, int vmalloced,int size)
supposed to kill the mall. */
void ip_conntrack_cleanup(void)
{
- ip_ct_attach = NULL;
+ rcu_assign_pointer(ip_ct_attach, NULL);
/* This makes sure all current packets have passed through
netfilter framework. Roll on, two-stage module
@@ -1515,7 +1515,7 @@ int __init ip_conntrack_init(void)
write_unlock_bh(&ip_conntrack_lock);
/* For use by ipt_REJECT */
- ip_ct_attach = ip_conntrack_attach;
+ rcu_assign_pointer(ip_ct_attach, ip_conntrack_attach);
/* Set up fake conntrack:
- to never be deleted, not in any hashes */