netdev - Re: [PATCH 1/2] genl: Fix genl dumpit() locking.

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Date:	Fri, 23 Aug 2013 11:51:25 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Pravin Shelar <pshelar@...ira.com>
Cc:	netdev <netdev@...r.kernel.org>, Jesse Gross <jesse@...ira.com>
Subject: Re: [PATCH 1/2] genl: Fix genl dumpit() locking.

On Fri, 2013-08-23 at 09:29 +0200, Johannes Berg wrote:

> > You are thinking abt genl-sock -> nlk -> cb_lock which is not used in
> > genl-dump locking if cb_lock is NULL while creating nl socket.
> 
> You're right, this is also done for each userland socket, so each socket
> now gets its own cb_mutex. This would help genl families with
> parallel_ops.

I'm still missing something. Kernel 3.4 had cb_mutex assign to the
genl_mutex, but we saw the original crash there, apparently dumpit
*wasn't* (always) locked with it?

johannes

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