From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Vasily Averin <vvs@parallels.com>
Cc: Florian Westphal <fw@strlen.de>,
netfilter-devel@vger.kernel.org,
Stephen Hemminger <stephen@networkplumber.org>,
Patrick McHardy <kaber@trash.net>,
Saikiran Madugula <hummerbliss@gmail.com>
Subject: Re: [PATCH] bridge: Superfluous skb->nfct check in br_nf_dev_queue_xmit
Date: Sun, 4 May 2014 14:54:27 +0200 [thread overview]
Message-ID: <20140504125427.GA4344@localhost> (raw)
In-Reply-To: <5360BA5A.7020200@parallels.com>
On Wed, Apr 30, 2014 at 12:54:50PM +0400, Vasily Averin wrote:
> Currently bridge can silently drop ipv4 fragments.
> If node have loaded nf_defrag_ipv4 module but have no nf_conntrack_ipv4,
> br_nf_pre_routing defragments incoming ipv4 fragments
> but nfct check in br_nf_dev_queue_xmit does not allow re-fragment combined packet back,
> and therefore it is dropped in br_dev_queue_push_xmit without incrementing of any failcounters
If no further objections, I'll push this original patch appending this comment
to the description:
[ It seems the only way to hit the ip_fragment code in the bridge xmit
path is to have a fragment list whose reassembled fragments go over
the mtu. This only happens if nf_defrag is enabled. Thanks to
Florian Westphal for providing feedback to clarify this. ]
next prev parent reply other threads:[~2014-05-04 12:54 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-17 11:15 [Bridge] [PATCH 1/1] superfluous skb->nfct check in br_nf_dev_queue_xmit Vasily Averin
2014-04-20 5:33 ` Vasily Averin
2014-04-20 5:33 ` Vasily Averin
2014-04-24 16:32 ` Florian Westphal
2014-04-24 17:05 ` [Bridge] " Florian Westphal
2014-04-28 12:37 ` Vasily Averin
2014-04-28 12:37 ` Vasily Averin
2014-04-28 13:16 ` Florian Westphal
2014-04-28 13:16 ` [Bridge] " Florian Westphal
2014-04-28 14:25 ` Vasily Averin
2014-04-28 14:25 ` Vasily Averin
2014-04-28 14:32 ` [Bridge] " Pablo Neira Ayuso
2014-04-28 14:32 ` Pablo Neira Ayuso
2014-04-30 9:06 ` [Bridge] " Vasily Averin
2014-04-30 9:06 ` Vasily Averin
2014-04-30 8:54 ` [PATCH] bridge: Superfluous " Vasily Averin
2014-04-30 9:39 ` Pablo Neira Ayuso
2014-04-30 10:02 ` Florian Westphal
2014-05-04 12:54 ` Pablo Neira Ayuso [this message]
2014-05-04 19:04 ` Vasily Averin
2014-05-04 19:25 ` Pablo Neira Ayuso
2014-05-04 20:17 ` [PATCH v2] bridge: superfluous " Vasily Averin
2014-05-05 14:07 ` Pablo Neira Ayuso
2014-04-29 14:10 ` [PATCH 1/1] " Patrick McHardy
2014-04-29 14:17 ` [Bridge] " Patrick McHardy
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