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

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Message-ID: <fa3c04ea-f27f-eeb2-d118-77f8fb805a8a@redhat.com>
Date:   Mon, 7 Jun 2021 15:58:19 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Dmitry Vyukov <dvyukov@...gle.com>,
        Wanpeng Li <kernellwp@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        syzkaller <syzkaller@...glegroups.com>
Cc:     syzbot <syzbot+71271244f206d17f6441@...kaller.appspotmail.com>,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, jarkko@...nel.org,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kan.liang@...ux.intel.com,
        kvm <kvm@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
        linux-sgx@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Sean Christopherson <seanjc@...gle.com>, steve.wahl@....com,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        the arch/x86 maintainers <x86@...nel.org>
Subject: Re: [syzbot] WARNING in x86_emulate_instruction

On 07/06/21 12:34, Dmitry Vyukov wrote:
> On Fri, May 28, 2021 at 2:34 AM Wanpeng Li <kernellwp@...il.com> wrote:
>>
>> On Fri, 28 May 2021 at 08:31, Thomas Gleixner <tglx@...utronix.de> wrote:
>>>
>>> On Fri, May 28 2021 at 01:21, Paolo Bonzini wrote:
>>>> On 28/05/21 00:52, Thomas Gleixner wrote:
>>>>>
>>>>> 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?
>>>>
>>>> Actually there's a patch on list ("KVM: X86: Fix warning caused by stale
>>>> emulation context").  Take care.
>>>
>>> That's useful, but does not change the fact that nobody bothered to
>>> reply to this report ...
>>
>> Will do it next time. Have a nice evening, guys!
> 
> There was an idea to do this automatically by syzbot:
> 
> dashboard/app: notify bug report about fix patches
> https://github.com/google/syzkaller/issues/1574
> 
> Namely: if syzbot discovers a fix anywhere (by the hash), it could
> send a notification email to the bug report email thread.
> The downside is that the robot sends even more emails, so I am not
> sure how it will be accepted. Any opinions?

I would like it.  Usually somebody replies _before_ they start working 
on it, but sometimes they send a patch right away.

Paolo