diff options
| -rw-r--r-- | virt/kvm/kvm_main.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 3caf8162eb6..e4d358195e5 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -784,13 +784,19 @@ int __kvm_set_memory_region(struct kvm *kvm, r = -ENOMEM; - /* Allocate if a slot is being created */ + /* + * Allocate if a slot is being created. If modifying a slot, + * the userspace_addr cannot change. + */ if (!old.npages) { new.user_alloc = user_alloc; new.userspace_addr = mem->userspace_addr; if (kvm_arch_create_memslot(&new, npages)) goto out_free; + } else if (npages && mem->userspace_addr != old.userspace_addr) { + r = -EINVAL; + goto out_free; } /* Allocate page dirty bitmap if needed */ |