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-prev] [day] [month] [year] [list]
Date:   Fri, 15 Oct 2021 11:02:35 +0200
From:   Paolo Bonzini <>
To:     Sean Christopherson <>
Cc:     Vitaly Kuznetsov <>,
        Wanpeng Li <>,
        Jim Mattson <>,
        Joerg Roedel <>,,,,
        Tetsuo Handa <>
Subject: Re: [PATCH 0/2] KVM: x86: Revert to fix apic_hw_disabled underflow

On 13/10/21 02:35, Sean Christopherson wrote:
> Revert (mostly) a patch from the vCPU RESET cleanup that open coded some
> APIC shenanigans to avoid stuffing vcpu->arch.apic_base at vCPU creation,
> and completely overlooked the side effects on apic_hw_disabled.  I went
> for a revert as I think the original behavior is the least awful solution,
> just somewhat poorly documented.
> The second patch adds WARNs to detect "overflow", where "overflow" means
> KVM incorrectly increments apic_hw_disabled.
> Sean Christopherson (2):
>    Revert "KVM: x86: Open code necessary bits of kvm_lapic_set_base() at
>      vCPU RESET"
>    KVM: x86: WARN if APIC HW/SW disable static keys are non-zero on
>      unload
>   arch/x86/kvm/lapic.c | 20 +++++++++++++-------
>   1 file changed, 13 insertions(+), 7 deletions(-)

Queued for 5.15, thanks.


Powered by blists - more mailing lists