netdev - possible deadlock in ppp_dev

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Message-ID: <94eb2c06f1342de95a05620bf522@google.com>
Date:   Fri, 05 Jan 2018 10:53:01 -0800
From:   syzbot <syzbot+367889b9c9e279219175@...kaller.appspotmail.com>
To:     g.nault@...halink.fr, linux-kernel@...r.kernel.org,
        linux-ppp@...r.kernel.org, netdev@...r.kernel.org,
        paulus@...ba.org, syzkaller-bugs@...glegroups.com
Subject: possible deadlock in ppp_dev_uninit

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger  
crash:

Reported-and-tested-by:  
syzbot+367889b9c9e279219175@...kaller.appspotmail.com

Note: the tag will also help syzbot to understand when the bug is fixed.

Tested on commit d1616f07e8f1a4a490d1791316d4a68906b284aa
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/master
compiler: gcc (GCC) 7.1.1 20170620
Patch is attached.
Kernel config is attached.


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View attachment "config.txt" of type "text/plain" (134344 bytes)

View attachment "patch.txt" of type "text/plain" (589 bytes)