From: Patrick McHardy <kaber@trash.net>
To: Henrik Nordstrom <hno@marasystems.com>
Cc: Pablo Neira <pablo@eurodev.net>,
netfilter-devel@lists.netfilter.org,
Harald Welte <laforge@netfilter.org>
Subject: Re: [PATCH] peer_pid checking in ip_queue
Date: Wed, 24 Mar 2004 01:47:47 +0100 [thread overview]
Message-ID: <4060DAB3.7010400@trash.net> (raw)
In-Reply-To: <Pine.LNX.4.44.0403240106490.15222-100000@filer.marasystems.com>
Henrik Nordstrom wrote:
> On Tue, 23 Mar 2004, Patrick McHardy wrote:
>
>
>>It can happen if peer_pid is checked outside the locked section on one
>>CPU and changed on another at the same time. I don't consider it
>>important, as the exact point in time at which the first packet will be
>>received is non-deterministic for userspace anyway.
>
>
> What about when the user program closes? How bad it is to have read the
> pid and then there is no userspace there?
It's no problem, netlink_unicast checks for existance of the socket,
which will be gone with the reader. If no socket is found it returns
-ECONNREFUSED.
Regards
Patrick
>
> Regards
> Henrik
>
next prev parent reply other threads:[~2004-03-24 0:47 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-23 11:09 [PATCH] peer_pid checking in ip_queue Pablo Neira
2004-03-23 17:25 ` Patrick McHardy
2004-03-23 18:10 ` Pablo Neira
2004-03-23 22:44 ` Patrick McHardy
2004-03-24 0:07 ` Henrik Nordstrom
2004-03-24 0:42 ` Pablo Neira
2004-03-24 2:11 ` Patrick McHardy
2004-03-24 0:47 ` Patrick McHardy [this message]
2004-03-27 21:20 ` Harald Welte
2004-03-27 23:50 ` Patrick McHardy
2004-03-27 21:17 ` Harald Welte
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