KVM: fix missing check for memslot flags
Check flags when memslot is registered from userspace as Avi's suggestion Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
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1 changed files with 12 additions and 0 deletions
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@ -678,6 +678,14 @@ void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new)
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slots->generation++;
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}
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static int check_memory_region_flags(struct kvm_userspace_memory_region *mem)
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{
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if (mem->flags & ~KVM_MEM_LOG_DIRTY_PAGES)
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return -EINVAL;
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return 0;
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}
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/*
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* Allocate some memory and give it an address in the guest physical address
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* space.
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@ -698,6 +706,10 @@ int __kvm_set_memory_region(struct kvm *kvm,
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struct kvm_memory_slot old, new;
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struct kvm_memslots *slots, *old_memslots;
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r = check_memory_region_flags(mem);
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if (r)
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goto out;
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r = -EINVAL;
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/* General sanity checks */
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if (mem->memory_size & (PAGE_SIZE - 1))
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