linux-kernel - [PATCH v2 0/2] KVM: SVM: Fix missing LAPIC TPR sync into VMCB::V

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: <cover.1756139678.git.maciej.szmigiero@oracle.com>
Date: Mon, 25 Aug 2025 18:44:27 +0200
From: "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
To: Paolo Bonzini <pbonzini@...hat.com>,
	Sean Christopherson <seanjc@...gle.com>
Cc: Maxim Levitsky <mlevitsk@...hat.com>,
	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	Naveen N Rao <naveen@...nel.org>,
	Alejandro Jimenez <alejandro.j.jimenez@...cle.com>,
	kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/2] KVM: SVM: Fix missing LAPIC TPR sync into VMCB::V_TPR with AVIC on

From: "Maciej S. Szmigiero" <maciej.szmigiero@...cle.com>

This is an updated v2 patch series of the v1 series located at:
https://lore.kernel.org/kvm/cover.1755609446.git.maciej.szmigiero@oracle.com/


Changes from v1:
Fix this issue by doing unconditional LAPIC -> V_TPR sync at each VMRUN
rather than by just patching the KVM_SET_LAPIC ioctl() code path
(and similar ones).


Maciej S. Szmigiero (2):
  KVM: SVM: Sync TPR from LAPIC into VMCB::V_TPR even if AVIC is active
  KVM: selftests: Test TPR / CR8 sync and interrupt masking

 arch/x86/kvm/svm/svm.c                        |   3 +-
 .../testing/selftests/kvm/include/x86/apic.h  |   5 +
 .../selftests/kvm/x86/xapic_state_test.c      | 265 +++++++++++++++++-
 3 files changed, 268 insertions(+), 5 deletions(-)