netdev - Re: WARNING in dev_change_net

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Message-ID: <20200608070930.GA555@willie-the-truck>
Date:   Mon, 8 Jun 2020 08:09:30 +0100
From:   Will Deacon <will@...nel.org>
To:     syzbot <syzbot+830c6dbfc71edc4f0b8f@...kaller.appspotmail.com>
Cc:     andriin@...com, ast@...nel.org, bpf@...r.kernel.org,
        daniel@...earbox.net, davem@...emloft.net, dsahern@...il.com,
        ebiederm@...ssion.com, edumazet@...gle.com, eric.dumazet@...il.com,
        hawk@...nel.org, jiri@...lanox.com, johannes.berg@...el.com,
        john.fastabend@...il.com, kafai@...com, kpsingh@...omium.org,
        kuba@...nel.org, leon@...nel.org, linux-kernel@...r.kernel.org,
        mkubecek@...e.cz, netdev@...r.kernel.org,
        saiprakash.ranjan@...eaurora.org, songliubraving@...com,
        suzuki.poulose@....com, syzkaller-bugs@...glegroups.com, yhs@...com
Subject: Re: WARNING in dev_change_net_namespace

On Sat, Jun 06, 2020 at 07:03:03AM -0700, syzbot wrote:
> syzbot has bisected this bug to:
> 
> commit 13dc4d836179444f0ca90188cfccd23f9cd9ff05
> Author: Will Deacon <will@...nel.org>
> Date:   Tue Apr 21 14:29:18 2020 +0000
> 
>     arm64: cpufeature: Remove redundant call to id_aa64pfr0_32bit_el0()
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=109aa3b1100000
> start commit:   7ae77150 Merge tag 'powerpc-5.8-1' of git://git.kernel.org..
> git tree:       upstream
> final crash:    https://syzkaller.appspot.com/x/report.txt?x=129aa3b1100000
> console output: https://syzkaller.appspot.com/x/log.txt?x=149aa3b1100000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=be4578b3f1083656
> dashboard link: https://syzkaller.appspot.com/bug?extid=830c6dbfc71edc4f0b8f
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12032832100000
> 
> Reported-by: syzbot+830c6dbfc71edc4f0b8f@...kaller.appspotmail.com
> Fixes: 13dc4d836179 ("arm64: cpufeature: Remove redundant call to id_aa64pfr0_32bit_el0()")


Yeah... I doubt that very much.

Will