Messages in this thread Patch in this message | | | Date | Tue, 07 Aug 2012 17:48:05 +0800 | From | Xiao Guangrong <> | Subject | [PATCH v5 01/12] KVM: fix missing check for memslot flags |
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Check flags when memslot is registered from userspace as Avi's suggestion
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> --- 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 a2e85af..7b94d70 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -678,6 +678,14 @@ 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. @@ -698,6 +706,10 @@ 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
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