linux-kernel - Fwd: kvm: Windows Server 2003 VM fails to work on 6.1.44 (works fine on 6.1.43)

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-next>] [day] [month] [year] [list]

Message-ID: <8cc000d5-9445-d6f1-f02e-4629a4a59e0e@gmail.com>
Date:   Wed, 16 Aug 2023 16:29:32 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Roman Mamedov <rm+bko@...anrm.net>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Regressions <regressions@...ts.linux.dev>,
        Linux KVM <kvm@...r.kernel.org>
Subject: Fwd: kvm: Windows Server 2003 VM fails to work on 6.1.44 (works fine
 on 6.1.43)

Hi,

I notice a regression report on Bugzilla [1]. Quoting from it:

> Hello,
> 
> I have a virtual machine running the old Windows Server 2003. On kernels 6.1.44 and 6.1.45, the QEMU VNC window stays dark, not switching to any of the guest's video modes and the VM process uses only ~64 MB of RAM of the assigned 2 GB, indefinitely. It's like the VM is paused/halted/stuck before even starting. The process can be killed successfully and then restarted again (with the same result), so it is not deadlocked in kernel or the like.
> 
> Kernel 6.1.43 works fine.
> 
> I have also tried downgrading CPU microcode from 20230808 to 20230719, but that did not help.
> 
> The CPU is AMD Ryzen 5900. I suspect some of the newly added mitigations may be the culprit?

See Bugzilla for the full thread.

Anyway, I'm adding it to regzbot as stable-specific regression:

#regzbot introduced: v6.1.43..v6.1.44 https://bugzilla.kernel.org/show_bug.cgi?id=217799
#regzbot title: Windows Server 2003 VM boot hang (only 64MB RAM allocated)

Thanks.

[1]: https://bugzilla.kernel.org/show_bug.cgi?id=217799
-- 
An old man doll... just what I always wanted! - Clara