linux-kernel - Re: BUG: MAX_STACK_TRACE

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Message-ID: <00000000000080952b0583d183f0@google.com>
Date:   Mon, 11 Mar 2019 06:26:01 -0700
From:   syzbot <syzbot+78923eea7cf44364f4fb@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, bvanassche@....org,
        darrick.wong@...cle.com, dledford@...hat.com,
        gustavo@...eddedor.com, hch@...radead.org, jannh@...gle.com,
        jgg@...pe.ca, johannes.berg@...el.com, leon@...nel.org,
        linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
        linux-xfs@...r.kernel.org, longman@...hat.com, mingo@...nel.org,
        mingo@...hat.com, paulmck@...ux.vnet.ibm.com, peterz@...radead.org,
        roland@...estorage.com, sean.hefty@...el.com,
        shamir.rabinovitch@...cle.com, swise@...ngridcomputing.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de, tj@...nel.org,
        torvalds@...ux-foundation.org, will.deacon@....com,
        xiyou.wangcong@...il.com
Subject: Re: BUG: MAX_STACK_TRACE_ENTRIES too low!

syzbot has bisected this bug to:

commit 669de8bda87b92ab9a2fc663b3f5743c2ad1ae9f
Author: Bart Van Assche <bvanassche@....org>
Date:   Thu Feb 14 23:00:54 2019 +0000

     kernel/workqueue: Use dynamic lockdep keys for workqueues

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17dec757200000
start commit:   669de8bd kernel/workqueue: Use dynamic lockdep keys for wo..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=143ec757200000
console output: https://syzkaller.appspot.com/x/log.txt?x=103ec757200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bd349f14600e1305
dashboard link: https://syzkaller.appspot.com/bug?extid=78923eea7cf44364f4fb
userspace arch: amd64
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=149c858d200000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=111aee33200000

Reported-by: syzbot+78923eea7cf44364f4fb@...kaller.appspotmail.com
Fixes: 669de8bd ("kernel/workqueue: Use dynamic lockdep keys for  
workqueues")