* [PATCH] KVM: VMX: Fix check for valid GVA on an EPT violation
@ 2025-11-06 5:28 Sukrit Bhatnagar
2025-11-06 6:07 ` Xiaoyao Li
2025-11-10 15:37 ` Sean Christopherson
0 siblings, 2 replies; 3+ messages in thread
From: Sukrit Bhatnagar @ 2025-11-06 5:28 UTC (permalink / raw)
To: Sean Christopherson, Paolo Bonzini, Thomas Gleixner, Ingo Molnar,
Borislav Petkov, Dave Hansen, x86, H. Peter Anvin, Yuan Yao
Cc: Sukrit.Bhatnagar, kvm, linux-kernel
On an EPT violation, bit 7 of the exit qualification is set if the
guest linear-address is valid. The derived page fault error code
should not be checked for this bit.
Fixes: f3009482512e ("KVM: VMX: Set PFERR_GUEST_{FINAL,PAGE}_MASK if and only if the GVA is valid")
Signed-off-by: Sukrit Bhatnagar <Sukrit.Bhatnagar@sony.com>
---
arch/x86/kvm/vmx/common.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/vmx/common.h b/arch/x86/kvm/vmx/common.h
index bc5ece76533a..412d0829d7a2 100644
--- a/arch/x86/kvm/vmx/common.h
+++ b/arch/x86/kvm/vmx/common.h
@@ -98,7 +98,7 @@ static inline int __vmx_handle_ept_violation(struct kvm_vcpu *vcpu, gpa_t gpa,
error_code |= (exit_qualification & EPT_VIOLATION_PROT_MASK)
? PFERR_PRESENT_MASK : 0;
- if (error_code & EPT_VIOLATION_GVA_IS_VALID)
+ if (exit_qualification & EPT_VIOLATION_GVA_IS_VALID)
error_code |= (exit_qualification & EPT_VIOLATION_GVA_TRANSLATED) ?
PFERR_GUEST_FINAL_MASK : PFERR_GUEST_PAGE_MASK;
--
2.43.0
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] KVM: VMX: Fix check for valid GVA on an EPT violation
2025-11-06 5:28 [PATCH] KVM: VMX: Fix check for valid GVA on an EPT violation Sukrit Bhatnagar
@ 2025-11-06 6:07 ` Xiaoyao Li
2025-11-10 15:37 ` Sean Christopherson
1 sibling, 0 replies; 3+ messages in thread
From: Xiaoyao Li @ 2025-11-06 6:07 UTC (permalink / raw)
To: Sukrit Bhatnagar, Sean Christopherson, Paolo Bonzini,
Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen, x86,
H. Peter Anvin, Yuan Yao
Cc: kvm, linux-kernel
On 11/6/2025 1:28 PM, Sukrit Bhatnagar wrote:
> On an EPT violation, bit 7 of the exit qualification is set if the
> guest linear-address is valid. The derived page fault error code
> should not be checked for this bit.
>
> Fixes: f3009482512e ("KVM: VMX: Set PFERR_GUEST_{FINAL,PAGE}_MASK if and only if the GVA is valid")
> Signed-off-by: Sukrit Bhatnagar <Sukrit.Bhatnagar@sony.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
> ---
> arch/x86/kvm/vmx/common.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/vmx/common.h b/arch/x86/kvm/vmx/common.h
> index bc5ece76533a..412d0829d7a2 100644
> --- a/arch/x86/kvm/vmx/common.h
> +++ b/arch/x86/kvm/vmx/common.h
> @@ -98,7 +98,7 @@ static inline int __vmx_handle_ept_violation(struct kvm_vcpu *vcpu, gpa_t gpa,
> error_code |= (exit_qualification & EPT_VIOLATION_PROT_MASK)
> ? PFERR_PRESENT_MASK : 0;
>
> - if (error_code & EPT_VIOLATION_GVA_IS_VALID)
> + if (exit_qualification & EPT_VIOLATION_GVA_IS_VALID)
> error_code |= (exit_qualification & EPT_VIOLATION_GVA_TRANSLATED) ?
> PFERR_GUEST_FINAL_MASK : PFERR_GUEST_PAGE_MASK;
>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] KVM: VMX: Fix check for valid GVA on an EPT violation
2025-11-06 5:28 [PATCH] KVM: VMX: Fix check for valid GVA on an EPT violation Sukrit Bhatnagar
2025-11-06 6:07 ` Xiaoyao Li
@ 2025-11-10 15:37 ` Sean Christopherson
1 sibling, 0 replies; 3+ messages in thread
From: Sean Christopherson @ 2025-11-10 15:37 UTC (permalink / raw)
To: Sean Christopherson, Paolo Bonzini, Thomas Gleixner, Ingo Molnar,
Borislav Petkov, Dave Hansen, x86, H. Peter Anvin, Yuan Yao,
Sukrit Bhatnagar
Cc: kvm, linux-kernel
On Thu, 06 Nov 2025 14:28:51 +0900, Sukrit Bhatnagar wrote:
> On an EPT violation, bit 7 of the exit qualification is set if the
> guest linear-address is valid. The derived page fault error code
> should not be checked for this bit.
Applied to kvm-x86 fixes (and it's in now in kvm/master as this "thank you" is
coming a bit late). Thanks!
[1/1] KVM: VMX: Fix check for valid GVA on an EPT violation
https://github.com/kvm-x86/linux/commit/d0164c161923
--
https://github.com/kvm-x86/linux/tree/next
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2025-11-10 15:38 UTC | newest]
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2025-11-06 5:28 [PATCH] KVM: VMX: Fix check for valid GVA on an EPT violation Sukrit Bhatnagar
2025-11-06 6:07 ` Xiaoyao Li
2025-11-10 15:37 ` Sean Christopherson
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