From bfbb307c628676929c2d329da0daf9d22afa8ad2 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 30 Nov 2021 15:53:37 +0300 Subject: [PATCH] KVM: VMX: Set failure code in prepare_vmcs02() The error paths in the prepare_vmcs02() function are supposed to set *entry_failure_code but this path does not. It leads to using an uninitialized variable in the caller. Fixes: 71f7347025bf ("KVM: nVMX: Load GUEST_IA32_PERF_GLOBAL_CTRL MSR on VM-Entry") Signed-off-by: Dan Carpenter Message-Id: <20211130125337.GB24578@kili> Signed-off-by: Paolo Bonzini --- arch/x86/kvm/vmx/nested.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 64f2828..9c94153 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -2591,8 +2591,10 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, if ((vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL) && WARN_ON_ONCE(kvm_set_msr(vcpu, MSR_CORE_PERF_GLOBAL_CTRL, - vmcs12->guest_ia32_perf_global_ctrl))) + vmcs12->guest_ia32_perf_global_ctrl))) { + *entry_failure_code = ENTRY_FAIL_DEFAULT; return -EINVAL; + } kvm_rsp_write(vcpu, vmcs12->guest_rsp); kvm_rip_write(vcpu, vmcs12->guest_rip); -- 2.7.4