Commit be6d05cf authored by Jan Kiszka's avatar Jan Kiszka Committed by Avi Kivity

KVM: VMX: Ensure that vmx_create_vcpu always returns proper error

In case certain allocations fail, vmx_create_vcpu may return 0 as error
instead of a negative value encoded via ERR_PTR. This causes a NULL
pointer dereferencing later on in kvm_vm_ioctl_vcpu_create.
Reported-by: default avatarSasha Levin <levinsasha928@gmail.com>
Signed-off-by: default avatarJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 7ae441ea
...@@ -4251,8 +4251,8 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) ...@@ -4251,8 +4251,8 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
goto free_vcpu; goto free_vcpu;
vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL); vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
err = -ENOMEM;
if (!vmx->guest_msrs) { if (!vmx->guest_msrs) {
err = -ENOMEM;
goto uninit_vcpu; goto uninit_vcpu;
} }
...@@ -4271,7 +4271,8 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id) ...@@ -4271,7 +4271,8 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
if (err) if (err)
goto free_vmcs; goto free_vmcs;
if (vm_need_virtualize_apic_accesses(kvm)) if (vm_need_virtualize_apic_accesses(kvm))
if (alloc_apic_access_page(kvm) != 0) err = alloc_apic_access_page(kvm);
if (err)
goto free_vmcs; goto free_vmcs;
if (enable_ept) { if (enable_ept) {
......
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