tree: https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue head: 7654a116f783ad0c71363bf3a4ce6e83a8fd68e5 commit: a3e967c0b87d394ea1d48d6575b3a372c5b45b54 [103/138] KVM: Terminate memslot walks via used_slots config: i386-allyesconfig (attached as .config) compiler: gcc-7 (Debian 7.5.0-5) 7.5.0 reproduce: git checkout a3e967c0b87d394ea1d48d6575b3a372c5b45b54 # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> Note: the kvm/queue HEAD 7654a116f783ad0c71363bf3a4ce6e83a8fd68e5 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): arch/x86/kvm/x86.c: In function '__x86_set_memory_region': >> arch/x86/kvm/x86.c:9744:9: error: large integer implicitly truncated to unsigned type [-Werror=overflow] hva = 0xdeadull << 48; ^~~~~~~~~ cc1: all warnings being treated as errors vim +9744 arch/x86/kvm/x86.c 9714 9715 int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size) 9716 { 9717 int i, r; 9718 unsigned long hva, uninitialized_var(old_npages); 9719 struct kvm_memslots *slots = kvm_memslots(kvm); 9720 struct kvm_memory_slot *slot; 9721 9722 /* Called with kvm->slots_lock held. */ 9723 if (WARN_ON(id >= KVM_MEM_SLOTS_NUM)) 9724 return -EINVAL; 9725 9726 slot = id_to_memslot(slots, id); 9727 if (size) { 9728 if (slot && slot->npages) 9729 return -EEXIST; 9730 9731 /* 9732 * MAP_SHARED to prevent internal slot pages from being moved 9733 * by fork()/COW. 9734 */ 9735 hva = vm_mmap(NULL, 0, size, PROT_READ | PROT_WRITE, 9736 MAP_SHARED | MAP_ANONYMOUS, 0); 9737 if (IS_ERR((void *)hva)) 9738 return PTR_ERR((void *)hva); 9739 } else { 9740 if (!slot || !slot->npages) 9741 return 0; 9742 9743 /* Stuff a non-canonical value to catch use-after-delete. */ > 9744 hva = 0xdeadull << 48; 9745 old_npages = slot->npages; 9746 } 9747 9748 for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { 9749 struct kvm_userspace_memory_region m; 9750 9751 m.slot = id | (i << 16); 9752 m.flags = 0; 9753 m.guest_phys_addr = gpa; 9754 m.userspace_addr = hva; 9755 m.memory_size = size; 9756 r = __kvm_set_memory_region(kvm, &m); 9757 if (r < 0) 9758 return r; 9759 } 9760 9761 if (!size) 9762 vm_munmap(hva, old_npages * PAGE_SIZE); 9763 9764 return 0; 9765 } 9766 EXPORT_SYMBOL_GPL(__x86_set_memory_region); 9767 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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