Syzbot CI

Subject	KVM: VMX APIC timer virtualization support
Author	isaku.yamahata@intel.com
Date	2026-02-03 18:16:44 +0000 UTC
Version
Cc	isaku.yamahata@gmail.com isaku.yamahata@intel.com kvm@vger.kernel.org linux-kernel@vger.kernel.org oliver.sang@intel.com pbonzini@redhat.com seanjc@google.com yang.zhong@linux.intel.com

Subject

KVM: VMX APIC timer virtualization support

Author

isaku.yamahata@intel.com

Date

2026-02-03 18:16:44 +0000 UTC

Version

isaku.yamahata@gmail.com isaku.yamahata@intel.com kvm@vger.kernel.org linux-kernel@vger.kernel.org oliver.sang@intel.com pbonzini@redhat.com seanjc@google.com yang.zhong@linux.intel.com

Name	Content [All]
[PATCH 01/32] KVM: VMX: Detect APIC timer virtualization bit	[Body]
[PATCH 02/32] KVM: x86: Implement APIC virt timer helpers with callbacks	[Body]
[PATCH 03/32] KVM: x86/lapic: Start/stop sw/hv timer on vCPU un/block	[Body]
[PATCH 04/32] KVM: x86/lapic: Wire DEADLINE MSR update to guest virtual TSC deadline	[Body]
[PATCH 05/32] KVM: x86/lapic: Add a trace point for guest virtual timer	[Body]
[PATCH 06/32] KVM: VMX: Implement the hooks for VMX guest virtual deadline timer	[Body]
[PATCH 07/32] KVM: VMX: Update APIC timer virtualization on apicv changed	[Body]
[PATCH 08/32] KVM: nVMX: Disallow/allow guest APIC timer virtualization switch to/from L2	[Body]
[PATCH 09/32] KVM: nVMX: Pass struct msr_data to VMX MSRs emulation	[Body]
[PATCH 10/32] KVM: nVMX: Supports VMX tertiary controls and GUEST_APIC_TIMER bit	[Body]
[PATCH 11/32] KVM: nVMX: Add tertiary VM-execution control VMCS support	[Body]
[PATCH 12/32] KVM: nVMX: Update intercept on TSC deadline MSR	[Body]
[PATCH 13/32] KVM: nVMX: Handle virtual timer vector VMCS field	[Body]
[PATCH 14/32] KVM: VMX: Make vmx_calc_deadline_l1_to_host() non-static	[Body]
[PATCH 15/32] KVM: nVMX: Enable guest deadline and its shadow VMCS field	[Body]
[PATCH 16/32] KVM: nVMX: Add VM entry checks related to APIC timer virtualization	[Body]
[PATCH 17/32] KVM: nVMX: Add check vmread/vmwrite on tertiary control	[Body]
[PATCH 18/32] KVM: nVMX: Add check VMCS index for guest timer virtualization	[Body]
[PATCH 19/32] KVM: VMX: Advertise tertiary controls to the user space	[Body]
[PATCH 20/32] KVM: VMX: dump_vmcs() support the guest virt timer	[Body]
[PATCH 21/32] KVM: VMX: Enable APIC timer virtualization	[Body]
[PATCH 22/32] KVM: VMX: Introduce module parameter for APIC virt timer support	[Body]
[PATCH 23/32] KVM: nVMX: Introduce module parameter for nested APIC timer virtualization	[Body]
[PATCH 24/32] KVM: selftests: Add a test to measure local timer latency	[Body]
[PATCH 25/32] KVM: selftests: Add nVMX support to timer_latency test case	[Body]
[PATCH 26/32] KVM: selftests: Add test for nVMX MSR_IA32_VMX_PROCBASED_CTLS3	[Body]
[PATCH 27/32] KVM: selftests: Add test vmx_set_nested_state_test with EVMCS disabled	[Body]
[PATCH 28/32] KVM: selftests: Add tests nested state of APIC timer virtualization	[Body]
[PATCH 29/32] KVM: selftests: Add VMCS access test to APIC timer virtualization	[Body]
[PATCH 30/32] KVM: selftests: Test cases for L1 APIC timer virtualization	[Body]
[PATCH 31/32] KVM: selftests: Add tests for nVMX to vmx_apic_timer_virt	[Body]
[PATCH 32/32] Documentation: KVM: x86: Update documentation of struct vmcs12	[Body]

Name

Content [All]

[PATCH 01/32] KVM: VMX: Detect APIC timer virtualization bit

[PATCH 02/32] KVM: x86: Implement APIC virt timer helpers with callbacks

[PATCH 03/32] KVM: x86/lapic: Start/stop sw/hv timer on vCPU un/block

[PATCH 04/32] KVM: x86/lapic: Wire DEADLINE MSR update to guest virtual TSC deadline

[PATCH 05/32] KVM: x86/lapic: Add a trace point for guest virtual timer

[PATCH 06/32] KVM: VMX: Implement the hooks for VMX guest virtual deadline timer

[PATCH 07/32] KVM: VMX: Update APIC timer virtualization on apicv changed

[PATCH 08/32] KVM: nVMX: Disallow/allow guest APIC timer virtualization switch to/from L2

[PATCH 09/32] KVM: nVMX: Pass struct msr_data to VMX MSRs emulation

[PATCH 10/32] KVM: nVMX: Supports VMX tertiary controls and GUEST_APIC_TIMER bit

[PATCH 11/32] KVM: nVMX: Add tertiary VM-execution control VMCS support

[PATCH 12/32] KVM: nVMX: Update intercept on TSC deadline MSR

[PATCH 13/32] KVM: nVMX: Handle virtual timer vector VMCS field

[PATCH 14/32] KVM: VMX: Make vmx_calc_deadline_l1_to_host() non-static

[PATCH 15/32] KVM: nVMX: Enable guest deadline and its shadow VMCS field

[PATCH 16/32] KVM: nVMX: Add VM entry checks related to APIC timer virtualization

[PATCH 17/32] KVM: nVMX: Add check vmread/vmwrite on tertiary control

[PATCH 18/32] KVM: nVMX: Add check VMCS index for guest timer virtualization

[PATCH 19/32] KVM: VMX: Advertise tertiary controls to the user space

[PATCH 20/32] KVM: VMX: dump_vmcs() support the guest virt timer

[PATCH 21/32] KVM: VMX: Enable APIC timer virtualization

[PATCH 22/32] KVM: VMX: Introduce module parameter for APIC virt timer support

[PATCH 23/32] KVM: nVMX: Introduce module parameter for nested APIC timer virtualization

[PATCH 24/32] KVM: selftests: Add a test to measure local timer latency

[PATCH 25/32] KVM: selftests: Add nVMX support to timer_latency test case

[PATCH 26/32] KVM: selftests: Add test for nVMX MSR_IA32_VMX_PROCBASED_CTLS3

[PATCH 27/32] KVM: selftests: Add test vmx_set_nested_state_test with EVMCS disabled

[PATCH 28/32] KVM: selftests: Add tests nested state of APIC timer virtualization

[PATCH 29/32] KVM: selftests: Add VMCS access test to APIC timer virtualization

[PATCH 30/32] KVM: selftests: Test cases for L1 APIC timer virtualization

[PATCH 31/32] KVM: selftests: Add tests for nVMX to vmx_apic_timer_virt

[PATCH 32/32] Documentation: KVM: x86: Update documentation of struct vmcs12

Session 2026-02-03

1 Findings

ID (for dev)	7e003d5a-ee98-4ae9-a069-2a278840cda1
Status	finished
Triaged	OK [Log]
Execution Log	[Link]

Test	Base	Patched	Verdict
[KASAN] Build Base	e89f0e9a0a007e8c3afb8ecd739c0b3255422b00 [Config]		passed [Log]
[KASAN] Boot test: Base	e89f0e9a0a007e8c3afb8ecd739c0b3255422b00 [Config]		passed [Log]
[KASAN] Build Patched		e89f0e9a0a007e8c3afb8ecd739c0b3255422b00 [Config] [patched]	passed [Log]
[KASAN] Boot test: Patched		e89f0e9a0a007e8c3afb8ecd739c0b3255422b00 [Config] [patched]	passed [Log]
[KASAN] Fuzzing	e89f0e9a0a007e8c3afb8ecd739c0b3255422b00 [Config]	e89f0e9a0a007e8c3afb8ecd739c0b3255422b00 [Config] [patched]	passed [Log] [Artifacts]
finding general protection fault in kvm_sync_apic_virt_timer Log Syz Repro C Repro

Patches (32)

Series Summary

Sessions

Session 2026-02-03