linux-kernel - Re: system time goes weird in kvm guest after host suspend/resume

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <87pnagf912.fsf@nanos.tec.linutronix.de>
Date:   Wed, 03 Jun 2020 17:45:13 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Miklos Szeredi <miklos@...redi.hu>
Cc:     kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Juergen Gross <jgross@...e.com>, linux-kernel@...r.kernel.org
Subject: Re: system time goes weird in kvm guest after host suspend/resume

Thomas Gleixner <tglx@...utronix.de> writes:

> Miklos Szeredi <miklos@...redi.hu> writes:
>> On Fri, May 29, 2020 at 2:31 PM Miklos Szeredi <miklos@...redi.hu> wrote:
>>
>>> > Can you please describe the setup of this test?
>>> >
>>> >  - Host kernel version
>>
>> 5.5.16-100.fc30.x86_64
>>
>>> >  - Guest kernel version
>>
>> 75caf310d16c ("Merge branch 'akpm' (patches from Andrew)")
>>
>>> >  - Is the revert done on the host or guest or both?
>>
>> Guest.
>>
>>> >  - Test flow is:
>>> >
>>> >    Boot host, start guest, suspend host, resume host, guest is screwed
>>> >
>>> >    correct?
>>>
>>> Yep.
>
> Of course this does not reproduce here. What kind of host is this
> running on? Can you provide a full demsg of the host please from boot to
> post resume?

Plus /proc/cpuinfo please (one CPU is sufficient)