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

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Date:	Sun, 13 Sep 2015 09:19:25 +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 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 ]

- Sedat -

View attachment "dmesg_4.3.0-rc1-1-iniza-small.txt" of type "text/plain" (79154 bytes)

Download attachment "config-4.3.0-rc1-1-iniza-small" of type "application/octet-stream" (130184 bytes)