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SubjectRe: BUG: MAX_STACK_TRACE_ENTRIES too low!
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On Mon, 2019-03-11 at 06:26 -0700, syzbot wrote:
> syzbot has bisected this bug to:
>
> commit 669de8bda87b92ab9a2fc663b3f5743c2ad1ae9f
> Author: Bart Van Assche <bvanassche@acm.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@syzkaller.appspotmail.com
> Fixes: 669de8bd ("kernel/workqueue: Use dynamic lockdep keys for
> workqueues")

I think this issue has been fixed by a commit that went upstream yesterday. Hence:

#syz fix: workqueue, lockdep: Fix an alloc_workqueue() error path

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