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From: Sasha Levin <levinsasha928@gmail.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: David Miller <davem@davemloft.net>,
	eric.dumazet@gmail.com, xemul@parallels.com,
	sjur.brandeland@stericsson.com, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, davej@redhat.com,
	sjurbren@gmail.com
Subject: Re: [PATCH 2/2] net caif:  Register properly as a pernet subsystem.
Date: Fri, 27 Jan 2012 08:24:28 -0500	[thread overview]
Message-ID: <1327670668.14789.4.camel@lappy> (raw)
In-Reply-To: <m1aa5ac8nu.fsf_-_@fess.ebiederm.org>

On Thu, 2012-01-26 at 16:04 -0800, Eric W. Biederman wrote:
> caif is a subsystem and as such it needs to register with
> register_pernet_subsys instead of register_pernet_device.
> 
> Among other problems using register_pernet_device was resulting in
> net_generic being called before the caif_net structure was allocated.
> Which has been causing net_generic to fail with either BUG_ON's or by
> return NULL pointers.
> 
> A more ugly problem that could be caused is packets in flight why the
> subsystem is shutting down.
> 
> To remove confusion also remove the cruft cause by inappropriately
> trying to fix this bug.
> 
> With the aid of the previous patch I have tested this patch and
> confirmed that using register_pernet_subsys makes the failure go away
> as it should.
> 
> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> 

I've tested these two patches as well, and they also work for me.

	Tested-by: Sasha Levin <levinsasha928@gmail.com>

-- 

Sasha.


  reply	other threads:[~2012-01-27 13:24 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-24  7:30 [PATCH] net: caif: Don't act on notification for non-caif devices Sasha Levin
2012-01-24 10:52 ` Sjur Brændeland
2012-01-24 14:49   ` Sasha Levin
2012-01-24 15:06     ` Sjur Brændeland
2012-01-24 15:23       ` Sasha Levin
2012-01-24 22:27         ` [PATCH net] caif: Fix crash due to uninitialized net name-space Sjur Brændeland
2012-01-24 22:44           ` David Miller
2012-01-25 16:13           ` Sasha Levin
2012-01-25 20:33           ` Sjur Brændeland
2012-01-26  6:14             ` Eric Dumazet
2012-01-26 10:41             ` [PATCH] netns: fix net_alloc_generic() Eric Dumazet
2012-01-26 10:44               ` Pavel Emelyanov
2012-01-26 10:51                 ` Eric Dumazet
2012-01-26 22:57                   ` Eric W. Biederman
2012-01-26 23:07                     ` David Miller
2012-01-26 23:57                       ` Eric W. Biederman
2012-01-27  0:02                       ` [PATCH 1/2] netns: Fail conspicously if someone uses net_generic at an inappropriate time Eric W. Biederman
2012-01-27  0:04                         ` [PATCH 2/2] net caif: Register properly as a pernet subsystem Eric W. Biederman
2012-01-27 13:24                           ` Sasha Levin [this message]
2012-01-27 14:48                             ` Sjur BRENDELAND
2012-01-28  2:07                           ` David Miller
2012-01-28  2:07                         ` [PATCH 1/2] netns: Fail conspicously if someone uses net_generic at an inappropriate time David Miller
2012-01-27  6:09                     ` [PATCH] netns: fix net_alloc_generic() Eric Dumazet
2012-01-27  6:54                       ` Eric W. Biederman
2012-01-27  7:07                         ` Eric Dumazet
2012-01-26 14:40               ` Sasha Levin
2012-01-26 18:37               ` David Miller

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