From: Dan Carpenter <dan.carpenter@oracle.com>
To: Paolo Bonzini <pbonzini@redhat.com>, Oliver Upton <oupton@google.com>
Cc: Sean Christopherson <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Krish Sadhukhan <krish.sadhukhan@oracle.com>,
Peter Shier <pshier@google.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: [PATCH] KVM: VMX: Set failure code in prepare_vmcs02()
Date: Tue, 30 Nov 2021 15:53:37 +0300 [thread overview]
Message-ID: <20211130125337.GB24578@kili> (raw)
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 <dan.carpenter@oracle.com>
---
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 315fa456d368..f321300883f9 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -2594,8 +2594,10 @@ 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);
--
2.20.1
next reply other threads:[~2021-11-30 12:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-30 12:53 Dan Carpenter [this message]
2021-11-30 16:30 ` [PATCH] KVM: VMX: Set failure code in prepare_vmcs02() Paolo Bonzini
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