linux-kernel - Re: [syzbot] WARNING in x86_emulate

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Date:   Fri, 28 May 2021 00:52:03 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     syzbot <syzbot+71271244f206d17f6441@...kaller.appspotmail.com>,
        bp@...en8.de, dave.hansen@...ux.intel.com, hpa@...or.com,
        jarkko@...nel.org, jmattson@...gle.com, joro@...tes.org,
        kan.liang@...ux.intel.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-sgx@...r.kernel.org,
        mingo@...hat.com, pbonzini@...hat.com, peterz@...radead.org,
        seanjc@...gle.com, steve.wahl@....com,
        syzkaller-bugs@...glegroups.com, vkuznets@...hat.com,
        wanpengli@...cent.com, x86@...nel.org
Subject: Re: [syzbot] WARNING in x86_emulate_instruction

On Fri, May 21 2021 at 19:52, syzbot wrote:

> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit:    8ac91e6c Merge tag 'for-5.13-rc2-tag' of git://git.kernel...
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=16a80fc7d00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=dddb87edd6431081
> dashboard link: https://syzkaller.appspot.com/bug?extid=71271244f206d17f6441
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12d1f89bd00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=134683fdd00000
>
> The issue was bisected to:
>
> commit 9a7832ce3d920426a36cdd78eda4b3568d4d09e3
> Author: Steve Wahl <steve.wahl@....com>
> Date:   Fri Jan 8 15:35:49 2021 +0000
>
>     perf/x86/intel/uncore: With > 8 nodes, get pci bus die id from NUMA info
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=152bf9b3d00000
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=172bf9b3d00000
> console output: https://syzkaller.appspot.com/x/log.txt?x=132bf9b3d00000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+71271244f206d17f6441@...kaller.appspotmail.com
> Fixes: 9a7832ce3d92 ("perf/x86/intel/uncore: With > 8 nodes, get pci bus die id from NUMA info")

So this is stale for a week now. It's fully reproducible and nobody
can't be bothered to look at that?

What's wrong with you people?

Thanks,

        tglx