linux-kernel - 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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <CAJfpegstNYeseo_C4KOF9Y74qRxr78x2tK-9rTgmYM4CK30nRQ@mail.gmail.com>
Date:   Thu, 28 May 2020 21:45:14 +0200
From:   Miklos Szeredi <miklos@...redi.hu>
To:     Thomas Gleixner <tglx@...utronix.de>
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: system time goes weird in kvm guest after host suspend/resume

Bisected it to:

b95a8a27c300 ("x86/vdso: Use generic VDSO clock mode storage")

The effect observed is that after the host is resumed, the clock in
the guest is somewhat in the future and is stopped.  I.e. repeated
date(1) invocations show the same time.

Attaching the .config

Thanks,
Miklos

Download attachment ".config" of type "application/octet-stream" (58152 bytes)