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authorFlorian Westphal <fw@strlen.de>2011-09-30 16:38:29 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2011-10-03 12:43:24 +0200
commit98d9ae841ad620045d653fb05764e4a899f42dbd (patch)
tree040d36bf3b350c16e6af847584fddc70272ccf9c /net
parentb582ad8e961c78458005250ae28fdd7a25db55aa (diff)
downloadlinux-98d9ae841ad620045d653fb05764e4a899f42dbd.tar.bz2
netfilter: nf_conntrack: fix event flooding in GRE protocol tracker
GRE connections cause ctnetlink event flood because the ASSURED event is set for every packet received. Reported-by: Denys Fedoryshchenko <denys@visp.net.lb> Tested-by: Denys Fedoryshchenko <denys@visp.net.lb> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/nf_conntrack_proto_gre.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c
index cf616e55ca41..d69facdd9a7a 100644
--- a/net/netfilter/nf_conntrack_proto_gre.c
+++ b/net/netfilter/nf_conntrack_proto_gre.c
@@ -241,8 +241,8 @@ static int gre_packet(struct nf_conn *ct,
nf_ct_refresh_acct(ct, ctinfo, skb,
ct->proto.gre.stream_timeout);
/* Also, more likely to be important, and not a probe. */
- set_bit(IPS_ASSURED_BIT, &ct->status);
- nf_conntrack_event_cache(IPCT_ASSURED, ct);
+ if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
+ nf_conntrack_event_cache(IPCT_ASSURED, ct);
} else
nf_ct_refresh_acct(ct, ctinfo, skb,
ct->proto.gre.timeout);