linux-kernel - [PATCH 4.17 265/324] kvm: nVMX: Restore exit qual for VM-entry failure due to MSR loading

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Message-Id: <20180823075009.247157354@linuxfoundation.org>
Date:   Thu, 23 Aug 2018 09:55:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jim Mattson <jmattson@...gle.com>,
        Krish Sadhukhan <krish.sadhukhan@...cle.com>,
        David Hildenbrand <david@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.17 265/324] kvm: nVMX: Restore exit qual for VM-entry failure due to MSR loading

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jim Mattson <jmattson@...gle.com>

[ Upstream commit 0b88abdc3f964c28ec03bc69eb17cb6b3b034564 ]

This exit qualification was inadvertently dropped when the two
VM-entry failure blocks were coalesced.

Fixes: e79f245ddec1 ("X86/KVM: Properly update 'tsc_offset' to represent the running guest")
Signed-off-by: Jim Mattson <jmattson@...gle.com>
Reviewed-by: Krish Sadhukhan <krish.sadhukhan@...cle.com>
Reviewed-by: David Hildenbrand <david@...hat.com>
Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/x86/kvm/vmx.c |    9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -11791,7 +11791,6 @@ static int enter_vmx_non_root_mode(struc
 {
 	struct vcpu_vmx *vmx = to_vmx(vcpu);
 	struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
-	u32 msr_entry_idx;
 	u32 exit_qual;
 	int r;
 
@@ -11813,10 +11812,10 @@ static int enter_vmx_non_root_mode(struc
 	nested_get_vmcs12_pages(vcpu, vmcs12);
 
 	r = EXIT_REASON_MSR_LOAD_FAIL;
-	msr_entry_idx = nested_vmx_load_msr(vcpu,
-					    vmcs12->vm_entry_msr_load_addr,
-					    vmcs12->vm_entry_msr_load_count);
-	if (msr_entry_idx)
+	exit_qual = nested_vmx_load_msr(vcpu,
+					vmcs12->vm_entry_msr_load_addr,
+					vmcs12->vm_entry_msr_load_count);
+	if (exit_qual)
 		goto fail;
 
 	/*