netfilter-devel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: pablo@netfilter.org
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, Florian Westphal <fw@strlen.de>,
	Pablo Neira Ayuso <pablo@netfilter.org>
Subject: [PATCH 1/2] netfilter: nf_conntrack: fix event flooding in GRE protocol tracker
Date: Wed, 12 Oct 2011 19:32:51 +0200	[thread overview]
Message-ID: <1318440772-21058-2-git-send-email-pablo@netfilter.org> (raw)
In-Reply-To: <1318440772-21058-1-git-send-email-pablo@netfilter.org>

From: Florian Westphal <fw@strlen.de>

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>
---
 net/netfilter/nf_conntrack_proto_gre.c |    4 ++--
 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 cf616e5..d69facd 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);
-- 
1.7.2.5


  reply	other threads:[~2011-10-12 17:39 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-10-12 17:32 [PATCH 0/2] netfilter updates for davem's net tree pablo
2011-10-12 17:32 ` pablo [this message]
2011-10-12 17:32 ` [PATCH 2/2] ipvs: netns shutdown/startup dead-lock pablo
2011-10-13 20:41 ` [PATCH 0/2] netfilter updates for davem's net tree David Miller
2011-10-17 23:40 ` David Miller

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1318440772-21058-2-git-send-email-pablo@netfilter.org \
    --to=pablo@netfilter.org \
    --cc=davem@davemloft.net \
    --cc=fw@strlen.de \
    --cc=netfilter-devel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).