linux-kernel - [PATCH 0/3] KVM: x86: WRMSR MCi_CTL/STATUS bug fix and cleanups

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]

Date:   Thu, 12 May 2022 22:27:13 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jue Wang <juew@...gle.com>
Subject: [PATCH 0/3] KVM: x86: WRMSR MCi_CTL/STATUS bug fix and cleanups

Fix bugs in set_msr_mce() where KVM returns '-1' instead of '1' when
rejecting a WRMSR, which results in -EPERM getting returned to userspace.

Patches 2 and 3 are cleanups to make {g,s}et_msr_mce a bit less wierd
(especially with respect to Jue's CMCI series) and a bit less magical.

Sean Christopherson (3):
  KVM: x86: Signal #GP, not -EPERM, on bad WRMSR(MCi_CTL/STATUS)
  KVM: x86: Use explicit case-statements for MCx banks in
    {g,s}et_msr_mce()
  KVM: x86: Add helpers to identify CTL and STATUS MCi MSRs

 arch/x86/kvm/x86.c | 84 +++++++++++++++++++++++++++-------------------
 1 file changed, 50 insertions(+), 34 deletions(-)


base-commit: 2764011106d0436cb44702cfb0981339d68c3509
-- 
2.36.0.550.gb090851708-goog