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Message-ID: <000000000000d458540583d4f6ef@google.com>
Date:   Mon, 11 Mar 2019 10:33:00 -0700
From:   syzbot <syzbot+be0c198232f86389c3dd@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, bp@...en8.de, bvanassche@....org,
        dave.hansen@...ux.intel.com, davem@...emloft.net,
        hmclauchlan@...com, hpa@...or.com, joe@...ches.com,
        johan.hedberg@...il.com, linux-bluetooth@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org, luto@...nel.org,
        marcel@...tmann.org, mhocko@...e.com, mingo@...nel.org,
        netdev@...r.kernel.org, paulmck@...ux.vnet.ibm.com,
        peterz@...radead.org, riel@...riel.com, rientjes@...gle.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        torvalds@...ux-foundation.org, will.deacon@....com
Subject: Re: WARNING in lockdep_unregister_key

syzbot has bisected this bug to:

commit 009bb421b6ceb7916ce627023d0eb7ced04c8910
Author: Bart Van Assche <bvanassche@....org>
Date:   Sun Mar 3 22:00:46 2019 +0000

     workqueue, lockdep: Fix an alloc_workqueue() error path

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1625a027200000
start commit:   009bb421 workqueue, lockdep: Fix an alloc_workqueue() erro..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=1525a027200000
console output: https://syzkaller.appspot.com/x/log.txt?x=1125a027200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=e9d91b7192a5e96e
dashboard link: https://syzkaller.appspot.com/bug?extid=be0c198232f86389c3dd
userspace arch: amd64
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1006dc83200000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=137d0027200000

Reported-by: syzbot+be0c198232f86389c3dd@...kaller.appspotmail.com
Fixes: 009bb421 ("workqueue, lockdep: Fix an alloc_workqueue() error path")

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