linux-kernel - [PATCH 0/2] KVM: nVMX: Fix VPID + !EPT TLB bugs

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: <20211125014944.536398-1-seanjc@google.com>
Date:   Thu, 25 Nov 2021 01:49:42 +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,
        Lai Jiangshan <jiangshanlai+lkml@...il.com>
Subject: [PATCH 0/2] KVM: nVMX: Fix VPID + !EPT TLB bugs

Fix two bugs reported by Lai where KVM mishandles guest-scoped TLB flushes
when L2 is active.  Bugs confirmed (and confirmed fixed) by the VPID+access
test (patches posted for kvm-unit-tests).

Sean Christopherson (2):
  KVM: nVMX: Flush current VPID (L1 vs. L2) for KVM_REQ_TLB_FLUSH_GUEST
  KVM: nVMX: Emulate guest TLB flush on nested VM-Enter with new vpid12

 arch/x86/kvm/vmx/nested.c | 45 +++++++++++++++++----------------------
 arch/x86/kvm/vmx/vmx.c    | 23 ++++++++++++--------
 arch/x86/kvm/x86.c        | 28 ++++++++++++++++++++----
 arch/x86/kvm/x86.h        |  7 +-----
 4 files changed, 59 insertions(+), 44 deletions(-)

-- 
2.34.0.rc2.393.gf8c9666880-goog