[PATCH 8/8] KVM: Fix oops on oom

__free_page() doesn't like a NULL argument, so check before calling it.  A
NULL can only happen if memory is exhausted during allocation of a memory
slot.

Signed-off-by: Avi Kivity <avi@xxxxxxxxxxxx>

Index: linux-2.6/drivers/kvm/kvm_main.c
===================================================================
--- linux-2.6.orig/drivers/kvm/kvm_main.c
+++ linux-2.6/drivers/kvm/kvm_main.c
@@ -245,7 +245,8 @@ static void kvm_free_physmem_slot(struct
        if (!dont || free->phys_mem != dont->phys_mem)
                if (free->phys_mem) {
                        for (i = 0; i < free->npages; ++i)
-                               __free_page(free->phys_mem[i]);
+                               if (free->phys_mem[i])
+                                       __free_page(free->phys_mem[i]);
                        vfree(free->phys_mem);
                }
 

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