Syzbot CI

Subject	KVM: x86/hyperv: Fix racy usage of vcpu->arch.hyperv
Author	seanjc@google.com
Date	2026-06-12 23:06:15 +0000 UTC
Version
Cc	kvm@vger.kernel.org linux-kernel@vger.kernel.org pbonzini@redhat.com seanjc@google.com syzbot@syzkaller.appspotmail.com vkuznets@redhat.com

Patches (8)

Expand

Name	Content [All]
[PATCH v2 1/8] KVM: x86/hyperv: Get target FIFO in hv_tlb_flush_enqueue(), not caller	[Body]
[PATCH v2 2/8] KVM: x86/hyperv: Check for NULL vCPU Hyper-V object in kvm_hv_get_tlb_flush_fifo()	[Body]
[PATCH v2 3/8] KVM: x86/hyperv: Ensure vCPU's Hyper-V object is initialized on cross-vCPU accesses	[Body]
[PATCH v2 4/8] KVM: Initialize a vCPU's index to '-1' while it's being created	[Body]
[PATCH v2 5/8] KVM: Move nVMX's lockdep logic for vcpu->mutex to a common helper	[Body]
[PATCH v2 6/8] KVM: x86: Treat a vCPU as unreachable if its index is invalid	[Body]
[PATCH v2 7/8] KVM: x86/hyperv: Assert vCPU's mutex is held in to_hv_vcpu()	[Body]
[PATCH v2 8/8] KVM: x86/hyperv: Use {READ,WRITE}_ONCE for cross-task synic->active accesses	[Body]

Series Summary

1 Findings

finding

Sessions

Session 2026-06-12

1 Findings

ID (for dev)	1aed8cd8-a5e6-436b-80ef-85a58a7146fe
Status	finished
Triaged	OK [Log]
Execution Log	[Link]

Test	Base	Patched	Verdict
[KASAN] Build Base	c1f7303302927f9cbf4efedf70f0512cde168c65 [Config]		passed [Log]
[KASAN] Boot test: Base	c1f7303302927f9cbf4efedf70f0512cde168c65 [Config]		passed [Log]
[KASAN] Build Patched		c1f7303302927f9cbf4efedf70f0512cde168c65 [Config] [patched]	passed [Log]
[KASAN] Boot test: Patched		c1f7303302927f9cbf4efedf70f0512cde168c65 [Config] [patched]	passed [Log]
[KASAN] Fuzz	c1f7303302927f9cbf4efedf70f0512cde168c65 [Config]	c1f7303302927f9cbf4efedf70f0512cde168c65 [Config] [patched]	passed [Log] [Artifacts]
finding WARNING in kvm_hv_vcpu_uninit Log Syz Repro