KVM: x86: Gracefully handle __vmalloc() failure during VM allocation
commit5.4-rM2-2.2.x-imx-squashedd18b2f43b9
upstream. Check the result of __vmalloc() to avoid dereferencing a NULL pointer in the event that allocation failres. Fixes:d1e5b0e98e
("kvm: Make VM ioctl do valloc for some archs") Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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455f37affe
commit
771b9374a5
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@ -1926,6 +1926,10 @@ static struct kvm *svm_vm_alloc(void)
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struct kvm_svm *kvm_svm = __vmalloc(sizeof(struct kvm_svm),
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GFP_KERNEL_ACCOUNT | __GFP_ZERO,
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PAGE_KERNEL);
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if (!kvm_svm)
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return NULL;
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return &kvm_svm->kvm;
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}
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@ -6654,6 +6654,10 @@ static struct kvm *vmx_vm_alloc(void)
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struct kvm_vmx *kvm_vmx = __vmalloc(sizeof(struct kvm_vmx),
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GFP_KERNEL_ACCOUNT | __GFP_ZERO,
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PAGE_KERNEL);
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if (!kvm_vmx)
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return NULL;
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return &kvm_vmx->kvm;
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}
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