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From: David Miller <davem@davemloft.net>
To: tparkin@katalix.com
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH 00/12] l2tp bugfix patchset
Date: Wed, 20 Mar 2013 12:14:12 -0400 (EDT)	[thread overview]
Message-ID: <20130320.121412.1230198756594408982.davem@davemloft.net> (raw)
In-Reply-To: <1363709483-24021-1-git-send-email-tparkin@katalix.com>

From: Tom Parkin <tparkin@katalix.com>
Date: Tue, 19 Mar 2013 16:11:11 +0000

> This l2tp bugfix patchset addresses a number of issues.
> 
> The first five patches in the series prevent l2tp sessions pinning an l2tp
> tunnel open.  This occurs because the l2tp tunnel is torn down in the tunnel
> socket destructor, but each session holds a tunnel socket reference which
> prevents tunnels with sessions being deleted.  The solution I've implemented
> here involves adding a .destroy hook to udp code, as discussed previously on
> netdev[1].
> 
> The subsequent seven patches address futher bugs exposed by fixing the problem
> above, or exposed through stress testing the implementation above.  Patch 11
> (avoid deadlock in l2tp stats update) isn't directly related to tunnel/session
> lifetimes, but it does prevent deadlocks on i386 kernels running on 64 bit
> hardware.
> 
> This patchset has been tested on 32 and 64 bit preempt/non-preempt kernels,
> using iproute2, openl2tp, and custom-made stress test code.
> 
> [1] http://comments.gmane.org/gmane.linux.network/259169

All applied, thanks for fixing all of these bugs Tom.

      parent reply	other threads:[~2013-03-20 16:14 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-19 16:11 [PATCH 00/12] l2tp bugfix patchset Tom Parkin
2013-03-19 16:11 ` [PATCH 01/12] udp: add encap_destroy callback Tom Parkin
2013-03-19 16:11 ` [PATCH 02/12] l2tp: add udp encap socket destroy handler Tom Parkin
2013-03-19 16:11 ` [PATCH 03/12] l2tp: export l2tp_tunnel_closeall Tom Parkin
2013-03-19 16:11 ` [PATCH 04/12] l2tp: close sessions in ip socket destroy callback Tom Parkin
2013-03-19 16:11 ` [PATCH 05/12] l2tp: close sessions before initiating tunnel delete Tom Parkin
2013-03-19 16:11 ` [PATCH 06/12] l2tp: take a reference for kernel sockets in l2tp_tunnel_sock_lookup Tom Parkin
2013-03-19 16:11 ` [PATCH 07/12] l2tp: don't BUG_ON sk_socket being NULL Tom Parkin
2013-03-19 16:11 ` [PATCH 08/12] l2tp: add session reorder queue purge function to core Tom Parkin
2013-03-19 16:11 ` [PATCH 09/12] l2tp: purge session reorder queue on delete Tom Parkin
2013-03-19 16:11 ` [PATCH 10/12] l2tp: push all ppp pseudowire shutdown through .release handler Tom Parkin
2013-03-19 16:11 ` [PATCH 11/12] l2tp: avoid deadlock in l2tp stats update Tom Parkin
2013-03-19 16:11 ` [PATCH 12/12] l2tp: unhash l2tp sessions on delete, not on free Tom Parkin
2013-03-20 16:14 ` David Miller [this message]

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