Syzbot CI

Subject	KVM: x86/hyperv: Fix racy usage of vcpu->arch.hyperv
Author	seanjc@google.com
Date	2026-06-25 22:36:14 +0000 UTC
Version
Cc	dwmw2@infradead.org kvm@vger.kernel.org linux-kernel@vger.kernel.org paul@xen.org pbonzini@redhat.com seanjc@google.com syzbot@syzkaller.appspotmail.com vkuznets@redhat.com

Subject

Author

seanjc@google.com

Date

2026-06-25 22:36:14 +0000 UTC

Version

dwmw2@infradead.org kvm@vger.kernel.org linux-kernel@vger.kernel.org paul@xen.org pbonzini@redhat.com seanjc@google.com syzbot@syzkaller.appspotmail.com vkuznets@redhat.com

Name	Content [All]
[PATCH v3 01/10] KVM: x86/hyperv: Get target FIFO in hv_tlb_flush_enqueue(), not caller	[Body]
[PATCH v3 02/10] KVM: x86/hyperv: Check for NULL vCPU Hyper-V object in kvm_hv_get_tlb_flush_fifo()	[Body]
[PATCH v3 03/10] KVM: x86/hyperv: Ensure vCPU's Hyper-V object is initialized on cross-vCPU accesses	[Body]
[PATCH v3 04/10] KVM: x86/xen: Punt singleshot timer hcalls to userspace if Xen vCPU ID isn't set	[Body]
[PATCH v3 05/10] KVM: x86/xen: Consolidate checks on Xen vCPU ID for singleshot timer hypercalls	[Body]
[PATCH v3 06/10] KVM: Initialize a vCPU's index to '-1' while it's being created	[Body]
[PATCH v3 07/10] KVM: Move nVMX's lockdep logic for vcpu->mutex to a common helper	[Body]
[PATCH v3 08/10] KVM: x86: Treat a vCPU as unreachable if its index is invalid	[Body]
[PATCH v3 09/10] KVM: x86/hyperv: Assert vCPU's mutex is held in to_hv_vcpu()	[Body]
[PATCH v3 10/10] KVM: x86/hyperv: Use {READ,WRITE}_ONCE for cross-task synic->active accesses	[Body]

Name

Content [All]

1 Findings

Test	Base	Patched	Verdict
[KASAN] Build Base	a204badd8432f93b7e862e7dac6db0fe3d65f370 [Config]		passed [Log]
[KASAN] Boot test: Base	a204badd8432f93b7e862e7dac6db0fe3d65f370 [Config]		passed [Log]
[KASAN] Build Patched		a204badd8432f93b7e862e7dac6db0fe3d65f370 [Config] [patched]	passed [Log]
[KASAN] Boot test: Patched		a204badd8432f93b7e862e7dac6db0fe3d65f370 [Config] [patched]	passed [Log]
[KASAN] Fuzz	a204badd8432f93b7e862e7dac6db0fe3d65f370 [Config]	a204badd8432f93b7e862e7dac6db0fe3d65f370 [Config] [patched]	passed [Log] [Artifacts]
finding WARNING in kvm_hv_vcpu_uninit Log Syz Repro