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From: "David S. Miller" <davem@redhat.com>
To: Patrick McHardy <kaber@trash.net>
Cc: laforge@netfilter.org, okir@suse.de, netdev@oss.sgi.com,
	netfilter-devel@lists.netfilter.org
Subject: Re: [PATCH] Prevent crash on ip_conntrack removal
Date: Sun, 22 Aug 2004 22:03:31 -0700	[thread overview]
Message-ID: <20040822220331.561fc276.davem@redhat.com> (raw)
In-Reply-To: <41289859.2040803@trash.net>

On Sun, 22 Aug 2004 14:58:01 +0200
Patrick McHardy <kaber@trash.net> wrote:

> The first fragment (offset=0) is given to ip_defrag by conntrack
> at PRE_ROUTING, without a dst_entry. Then conntrack is unloaded.
> Further fragments are now queued in ip_local_deliver. When the
> packet is reassembled and "continues" its way from
> ip_local_deliver, it doesn't have a dst_entry.
> 
> The opposite way is of course also possible, packets queued in
> ip_local_deliver can jump and appear in the PRE_ROUTING hook
> when conntrack is loaded, but that way doesn't seem to cause
> problems.

Thanks for the explanation Patrick.

Let me brain storm on this on Monday (tomorrow).

  reply	other threads:[~2004-08-23  5:03 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-08-18  9:13 [PATCH] Prevent crash on ip_conntrack removal Olaf Kirch
2004-08-19 10:11 ` Harald Welte
2004-08-19 14:18   ` David S. Miller
2004-08-19 14:55     ` Patrick McHardy
2004-08-19 15:14       ` David S. Miller
2004-08-21 15:10         ` Patrick McHardy
2004-08-22  5:13           ` David S. Miller
2004-08-22 12:58             ` Patrick McHardy
2004-08-23  5:03               ` David S. Miller [this message]
2004-08-23 21:18               ` David Stevens
2004-08-24  0:45                 ` Nivedita Singhvi
2004-08-24  0:45                 ` Patrick McHardy
2004-08-24 21:28                   ` David Stevens
2004-08-29  6:15                     ` David S. Miller
2004-08-29 19:36                       ` Patrick McHardy
2004-08-29 19:57                         ` David S. Miller
2004-08-29 20:06                           ` Patrick McHardy
2004-08-29 21:58                           ` Patrick McHardy
2004-08-29 23:38                             ` David S. Miller
2004-08-30  0:50                               ` Patrick McHardy
2004-08-30  4:28                                 ` David S. Miller
2004-08-29 21:48                         ` Patrick McHardy
2004-08-30  7:57                         ` Olaf Kirch

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