Commit d18b2f43 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
Browse files

KVM: x86: Gracefully handle __vmalloc() failure during VM allocation 



Check the result of __vmalloc() to avoid dereferencing a NULL pointer in
the event that allocation failres.

Fixes: d1e5b0e9 ("kvm: Make VM ioctl do valloc for some archs")
Cc: stable@vger.kernel.org
Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 168d918f

arch/x86/kvm/svm.c

+4 −0
Original line number Diff line number Diff line
@@ -1949,6 +1949,10 @@ static struct kvm *svm_vm_alloc(void) 
	struct kvm_svm *kvm_svm = __vmalloc(sizeof(struct kvm_svm),

					    GFP_KERNEL_ACCOUNT | __GFP_ZERO,

					    PAGE_KERNEL);



	if (!kvm_svm)

		return NULL;



	return &kvm_svm->kvm;

}

arch/x86/kvm/vmx/vmx.c

+4 −0
Original line number Diff line number Diff line
@@ -6684,6 +6684,10 @@ static struct kvm *vmx_vm_alloc(void) 
	struct kvm_vmx *kvm_vmx = __vmalloc(sizeof(struct kvm_vmx),

					    GFP_KERNEL_ACCOUNT | __GFP_ZERO,

					    PAGE_KERNEL);



	if (!kvm_vmx)

		return NULL;



	return &kvm_vmx->kvm;

}

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