Check flags when memslot is registered from userspace as Avi's suggestion Signed-off-by: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxxxxxx> --- virt/kvm/kvm_main.c | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 78cf42f..7cb29bb 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -689,6 +689,14 @@ void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new) slots->generation++; } +static int check_memory_region_flags(struct kvm_userspace_memory_region *mem) +{ + if (mem->flags & ~KVM_MEM_LOG_DIRTY_PAGES) + return -EINVAL; + + return 0; +} + /* * Allocate some memory and give it an address in the guest physical address * space. @@ -709,6 +717,10 @@ int __kvm_set_memory_region(struct kvm *kvm, struct kvm_memory_slot old, new; struct kvm_memslots *slots, *old_memslots; + r = check_memory_region_flags(mem); + if (r) + goto out; + r = -EINVAL; /* General sanity checks */ if (mem->memory_size & (PAGE_SIZE - 1)) -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html