From: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
commit d18b2f43b9147c8005ae0844fb445d8cc6a87e31 upstream.
Check the result of __vmalloc() to avoid dereferencing a NULL pointer in
the event that allocation failres.
Fixes: d1e5b0e98ea27 ("kvm: Make VM ioctl do valloc for some archs")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Reviewed-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/svm.c | 4 ++++
arch/x86/kvm/vmx.c | 4 ++++
2 files changed, 8 insertions(+)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1917,6 +1917,10 @@ static void __unregister_enc_region_lock
static struct kvm *svm_vm_alloc(void)
{
struct kvm_svm *kvm_svm = vzalloc(sizeof(struct kvm_svm));
+
+ if (!kvm_svm)
+ return NULL;
+
return &kvm_svm->kvm;
}
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -10986,6 +10986,10 @@ STACK_FRAME_NON_STANDARD(vmx_vcpu_run);
static struct kvm *vmx_vm_alloc(void)
{
struct kvm_vmx *kvm_vmx = vzalloc(sizeof(struct kvm_vmx));
+
+ if (!kvm_vmx)
+ return NULL;
+
return &kvm_vmx->kvm;
}
