x86_exception_has_error_code should deterministically return false if
its operand is greater than 32.
Fixes: 0447378a4a793 ("kvm: vmx: Nested VM-entry prereqs for event inj.")
Cc: Marc Orr <marcorr@xxxxxxxxxx>
Cc: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx>
Reviewed-by: Krish Sadhukhan <krish.sadhukhan@xxxxxxxxxx>
Reviewed-by: Marc Orr <marcorr@xxxxxxxxxx>
---
arch/x86/kvm/x86.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index 67b9568613f3..152b20d06a48 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -116,7 +116,8 @@ static inline bool x86_exception_has_error_code(unsigned int vector)
BIT(NP_VECTOR) | BIT(SS_VECTOR) | BIT(GP_VECTOR) |
BIT(PF_VECTOR) | BIT(AC_VECTOR);
- return (1U << vector) & exception_has_error_code;
+ WARN_ON_ONCE(vector >= 32);
+ return vector < 32 && (1U << vector) & exception_has_error_code;
}
static inline bool mmu_is_nested(struct kvm_vcpu *vcpu)
--
2.19.1.331.ge82ca0e54c-goog
