linux-kernel - Re: 3.11.0-rc6+: INFO: possible circular locking dependency detected

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Message-ID: <8761v0j0w5.fsf@nemi.mork.no>
Date:	Tue, 20 Aug 2013 09:07:38 +0200
From:	Bjørn Mork <bjorn@...k.no>
To:	Miles Lane <miles.lane@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 3.11.0-rc6+: INFO: possible circular locking dependency detected

Miles Lane <miles.lane@...il.com> writes:

> [   24.990076] [ INFO: possible circular locking dependency detected ]
> [   24.990086] 3.11.0-rc6+ #154 Not tainted
> [   24.990094] -------------------------------------------------------
> [   24.990103] crda/1159 is trying to acquire lock:
> [   24.990111]  (genl_mutex){+.+.+.}, at: [<ffffffff812ff7e6>]
> genl_lock+0x12/0x14
> [   24.990134]
> [   24.990134] but task is already holding lock:
> [   24.990144]  (nlk->cb_mutex){+.+.+.}, at: [<ffffffff812fdab8>]
> netlink_dump+0x1c/0x1da

Yes, me too...  This is already discussed on netdev:
http://www.spinics.net/lists/stable/msg18179.html

But the fix is still out in the blue as far as I understand.  Reverting
58ad436fc will fix it, but leave the original problem (missing locking)
unfixed.


Bjørn

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