netdev - Re: [PATCH 3/3] tproxy: fix hash locking issue when using port redirection in __inet_inherit

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Message-ID: <4CC01F16.2000008@trash.net>
Date:	Thu, 21 Oct 2010 13:08:06 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	KOVACS Krisztian <hidden@...abit.hu>
CC:	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH 3/3] tproxy: fix hash locking issue when using port redirection
 in __inet_inherit_port()

Am 20.10.2010 13:21, schrieb KOVACS Krisztian:
> When __inet_inherit_port() is called on a tproxy connection the wrong locks are
> held for the inet_bind_bucket it is added to. __inet_inherit_port() made an
> implicit assumption that the listener's port number (and thus its bind bucket).
> Unfortunately, if you're using the TPROXY target to redirect skbs to a
> transparent proxy that assumption is not true anymore and things break.
> 
> This patch adds code to __inet_inherit_port() so that it can handle this case
> by looking up or creating a new bind bucket for the child socket and updates
> callers of __inet_inherit_port() to gracefully handle __inet_inherit_port()
> failing.
> 
> Reported by and original patch from Stephen Buck <stephen.buck@...nda.com>.
> See http://marc.info/?t=128169268200001&r=1&w=2 for the original discussion.

Applied, thanks.
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