| Message ID | 1472132015-10264-2-git-send-email-fw@strlen.de |
|---|---|
| State | Accepted |
| Delegated to: | Pablo Neira |
| Headers | show |
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 7d90a5d..887926a 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -809,6 +809,7 @@ nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple, zone = nf_ct_zone(ignored_conntrack); rcu_read_lock(); + begin: nf_conntrack_get_ht(&ct_hash, &hsize); hash = __hash_conntrack(net, tuple, hsize); @@ -822,6 +823,12 @@ nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple, } NF_CT_STAT_INC_ATOMIC(net, searched); } + + if (get_nulls_value(n) != hash) { + NF_CT_STAT_INC_ATOMIC(net, search_restart); + goto begin; + } + rcu_read_unlock(); return 0;
In case nf_conntrack_tuple_taken did not find a conflicting entry check that all entries in this hash slot were tested and restart in case an entry was moved to another chain. Reported-by: Eric Dumazet <edumazet@google.com> Fixes: ea781f197d6a ("netfilter: nf_conntrack: use SLAB_DESTROY_BY_RCU and get rid of call_rcu()") Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Eric Dumazet <edumazet@google.com> --- net/netfilter/nf_conntrack_core.c | 7 +++++++ 1 file changed, 7 insertions(+)