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 PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Tue, 10 Aug 2021 15:45:52 -0700 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, Ben Gardon <bgardon@...gle.com> Subject: [PATCH 0/2] KVM: x86/mmu: Fix unsync races within TDP MMU Patch 1 fixes a bug where concurrent TDP MMU page faults can "corrupt" the unsync shadow page fields, notably unsync_children, as the TDP MMU holds mmu_lock for read and the unsync logic is not thread safe. Patch 2 is a tangentially related cleanup. Sean Christopherson (2): KVM: x86/mmu: Protect marking SPs unsync when using TDP MMU with spinlock KVM: x86/mmu: Drop 'shared' param from tdp_mmu_link_page() Documentation/virt/kvm/locking.rst | 8 +++---- arch/x86/include/asm/kvm_host.h | 3 +++ arch/x86/kvm/mmu/mmu.c | 36 ++++++++++++++++++++++++++++-- arch/x86/kvm/mmu/mmu_internal.h | 3 ++- arch/x86/kvm/mmu/spte.c | 4 ++-- arch/x86/kvm/mmu/spte.h | 2 +- arch/x86/kvm/mmu/tdp_mmu.c | 20 +++++------------ 7 files changed, 52 insertions(+), 24 deletions(-) -- 2.32.0.605.g8dce9f2422-goog
Powered by blists - more mailing lists