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| author |   Eric Dumazet <dada1@cosmosbay.com> | 2009-03-25 17:24:34 +0100 |
|---|---|---|
| committer |   Patrick McHardy <kaber@trash.net> | 2009-03-25 17:24:34 +0100 |
| commit | 78f3648601fdc7a8166748bbd6d0555a88efa24a (patch) | |
| tree | 6884aa56afe297f794b4bd926890a59eae6c259e /net/netfilter/nf_conntrack_core.c | |
| parent | netfilter: fix xt_LED build failure (diff) | |
| download | linux-dev-78f3648601fdc7a8166748bbd6d0555a88efa24a.tar.xz linux-dev-78f3648601fdc7a8166748bbd6d0555a88efa24a.zip | |
netfilter: nf_conntrack: use hlist_add_head_rcu() in nf_conntrack_set_hashsize()
Using hlist_add_head() in nf_conntrack_set_hashsize() is quite dangerous.
Without any barrier, one CPU could see a loop while doing its lookup.
Its true new table cannot be seen by another cpu, but previous table is still
readable.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/netfilter/nf_conntrack_core.c')
| -rw-r--r-- | net/netfilter/nf_conntrack_core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 55befe59e1c0..54e983f13898 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1121,7 +1121,7 @@ int nf_conntrack_set_hashsize(const char *val, struct kernel_param *kp) struct nf_conntrack_tuple_hash, hnode); hlist_del_rcu(&h->hnode); bucket = __hash_conntrack(&h->tuple, hashsize, rnd); - hlist_add_head(&h->hnode, &hash[bucket]); + hlist_add_head_rcu(&h->hnode, &hash[bucket]); } } old_size = nf_conntrack_htable_size; |