linux-kernel - Re: WARNING: at arch/x86/kvm/../../../virt/kvm/kvm_main.c:3156 mark_page_dirty_in

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Date:   Tue, 29 Mar 2022 16:17:28 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>, kvm list <kvm@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org, Shuah Khan <shuah@...nel.org>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: WARNING: at arch/x86/kvm/../../../virt/kvm/kvm_main.c:3156
 mark_page_dirty_in_slot

On Tue, Mar 29, 2022, Naresh Kamboju wrote:
> While running kselftest kvm test cases on x86_64 devices the following
> kernel warning was reported.

...

> [   62.510388] ------------[ cut here ]------------
> [   62.515064] WARNING: CPU: 1 PID: 915 at
> arch/x86/kvm/../../../virt/kvm/kvm_main.c:3156
> mark_page_dirty_in_slot+0xba/0xd0
> [   62.525968] Modules linked in: x86_pkg_temp_thermal fuse
> [   62.531307] CPU: 1 PID: 915 Comm: hyperv_clock Not tainted 5.17.0 #1
> [   62.537691] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
> 2.0b 07/27/2017
> [   62.545185] RIP: 0010:mark_page_dirty_in_slot+0xba/0xd0

Long known issue.  I think we're all waiting for someone else to post an actual
patch.

Vitaly, can you formally post the below patch, or do you need feedback first?

https://lore.kernel.org/all/874k51eddp.fsf@redhat.com/