linux-kernel - Re: WARNING in static_key_disable

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Message-ID: <93ee204b846462f9ead610e5afe737389724d0aa.camel@redhat.com>
Date:   Sat, 17 Nov 2018 17:25:43 +0100
From:   Paolo Abeni <pabeni@...hat.com>
To:     Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        syzbot+6cffdef928852907751c@...kaller.appspotmail.com,
        "David S. Miller" <davem@...emloft.net>
Cc:     Borislav Petkov <bp@...e.de>, Jason Baron <jbaron@...mai.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        syzkaller-bugs@...glegroups.com,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: WARNING in static_key_disable_cpuslocked

Hi,

On Sat, 2018-11-17 at 06:52 -0800, Ard Biesheuvel wrote:
> (+ Paolo, Dave)
> 
> On Sat, 17 Nov 2018 at 01:59, syzbot
> <syzbot+6cffdef928852907751c@...kaller.appspotmail.com> wrote:
> > 
> > Hello,
> > 
> > syzbot found the following crash on:
> > 
> > HEAD commit:    442b8cea2477 Add linux-next specific files for 20181109
> > git tree:       linux-next
> > console output: https://syzkaller.appspot.com/x/log.txt?x=11f1dc25400000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=2f72bdb11df9fbe8
> > dashboard link: https://syzkaller.appspot.com/bug?extid=6cffdef928852907751c
> > compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10126533400000
> > 
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+6cffdef928852907751c@...kaller.appspotmail.com

This should be addressed in current net-next, by commit:

commit 9c48060141bd937497774546e4bb89b8992be383
Author: Paolo Abeni <pabeni@...hat.com>
Date:   Thu Nov 15 02:34:50 2018 +0100

    udp: fix jump label misuse

Cheers,

Paolo