linux-kernel - Re: [Linux 4.2-rc8+] circular locking dependency detected: [pppd] ppp_dev_uninit()

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Message-ID: <CA+icZUU6EmTQjtWrOymqaL+=wj4e2PPWbiNPMJUAqB0y-ByEsA@mail.gmail.com>
Date:	Mon, 21 Sep 2015 00:56:57 +0200
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Guillaume Nault <g.nault@...halink.fr>
Cc:	"David S. Miller" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [Linux 4.2-rc8+] circular locking dependency detected: [pppd]
 ppp_dev_uninit() | rtnl_lock()

On Sun, Sep 13, 2015 at 9:19 AM, Sedat Dilek <sedat.dilek@...il.com> wrote:
> On Fri, Sep 4, 2015 at 10:32 PM, Sedat Dilek <sedat.dilek@...il.com> wrote:
>>> Could this be caused by this commit...?
>>>
>>> commit 8cb775bc0a34dc596837e7da03fd22c747be618b
>>> "ppp: fix device unregistration upon netns deletion"
>>>
>>
>> With the Revert "ppp: fix device unregistration upon netns deletion" I
>> do not see any lockdep issues.
>>
>
> I still see this issue with Linux v4.3-rc1.
>
> [ TEST-CASE (reproducible) ]
>
> root# stop network-manager
>
> root# modprobe -r -v ppp_deflate
>
> [ /TEST-CASE ]
>

Still seeing this with v4.3-rc2 and above test-case.

- Sedat -

View attachment "dmesg_4.3.0-rc2-1-iniza-small_pppd.txt" of type "text/plain" (72464 bytes)

Download attachment "config-4.3.0-rc2-1-iniza-small" of type "application/octet-stream" (130184 bytes)