Re: [PATCH v8 3/7] KVM: x86: Fix potential race in KVM_GET_CLOCK
flat view
From: Marcelo Tosatti <hidden>
Date: 2021-09-29 13:35:42
Also in:
kvm, kvmarm
On Thu, Sep 16, 2021 at 06:15:34PM +0000, Oliver Upton wrote:
Sean noticed that KVM_GET_CLOCK was checking kvm_arch.use_master_clock outside of the pvclock sync lock. This is problematic, as the clock value written to the user may or may not actually correspond to a stable TSC. Fix the race by populating the entire kvm_clock_data structure behind the pvclock_gtod_sync_lock. Suggested-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Oliver Upton <redacted>
ACK patches 1-3, still reviewing the remaining ones... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel