tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 260c7a5874066269671cc826d6c9ccd70dd001e5 commit: 7eb46ab3d33ed664d9d4fe0e3cdf3232a9099e11 [28292/30000] KVM: x86/mmu: Skip rmap operations if rmaps not allocated config: x86_64-randconfig-161-20240129 (https://download.01.org/0day-ci/archive/20240201/202402010712.s76rk6os-lkp@i...) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0

If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot lkp@intel.com | Closes: https://lore.kernel.org/oe-kbuild-all/202402010712.s76rk6os-lkp@intel.com/

New smatch warnings: arch/x86/kvm/mmu/mmu.c:5812 kvm_mmu_slot_largepage_remove_write_access() error: uninitialized symbol 'flush'. arch/x86/kvm/mmu/mmu.c:5834 kvm_mmu_slot_set_dirty() error: uninitialized symbol 'flush'.

Old smatch warnings: arch/x86/kvm/mmu/mmu.c:3788 direct_page_fault() warn: missing error code? 'r' arch/x86/kvm/mmu/paging_tmpl.h:857 ept_page_fault() warn: missing error code? 'r' arch/x86/kvm/mmu/paging_tmpl.h:857 paging64_page_fault() warn: missing error code? 'r' arch/x86/kvm/mmu/paging_tmpl.h:857 paging32_page_fault() warn: missing error code? 'r' arch/x86/kvm/mmu/mmu.c:5743 kvm_mmu_zap_collapsible_sptes() error: uninitialized symbol 'flush'.

vim +/flush +5812 arch/x86/kvm/mmu/mmu.c

f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5793 f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5794 void kvm_mmu_slot_largepage_remove_write_access(struct kvm *kvm, f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5795 struct kvm_memory_slot *memslot) f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5796 { d77aa73c7072c5 arch/x86/kvm/mmu.c Xiao Guangrong 2015-05-13 5797 bool flush; f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5798 7eb46ab3d33ed6 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-05-18 5799 if (kvm_memslots_have_rmaps(kvm)) { 91f65ea3582813 arch/x86/kvm/mmu/mmu.c Ben Gardon 2023-08-14 5800 write_lock(&kvm->mmu_lock); d77aa73c7072c5 arch/x86/kvm/mmu.c Xiao Guangrong 2015-05-13 5801 flush = slot_handle_large_level(kvm, memslot, slot_rmap_write_protect, f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5802 false); 91f65ea3582813 arch/x86/kvm/mmu/mmu.c Ben Gardon 2023-08-14 5803 write_unlock(&kvm->mmu_lock); 7eb46ab3d33ed6 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-05-18 5804 } f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5805 ac11ca5ab371f5 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-04-01 5806 if (is_tdp_mmu_enabled(kvm)) { ac11ca5ab371f5 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-04-01 5807 read_lock(&kvm->mmu_lock); ac11ca5ab371f5 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-04-01 5808 flush |= kvm_tdp_mmu_wrprot_slot(kvm, memslot, PG_LEVEL_2M); ac11ca5ab371f5 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-04-01 5809 read_unlock(&kvm->mmu_lock); ac11ca5ab371f5 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-04-01 5810 } ac11ca5ab371f5 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-04-01 5811 f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 @5812 if (flush) 7f42aa76d4a558 arch/x86/kvm/mmu/mmu.c Sean Christopherson 2020-02-18 5813 kvm_arch_flush_remote_tlbs_memslot(kvm, memslot); f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5814 } f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5815 EXPORT_SYMBOL_GPL(kvm_mmu_slot_largepage_remove_write_access); f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5816 f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5817 void kvm_mmu_slot_set_dirty(struct kvm *kvm, f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5818 struct kvm_memory_slot *memslot) f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5819 { d77aa73c7072c5 arch/x86/kvm/mmu.c Xiao Guangrong 2015-05-13 5820 bool flush; f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5821 7eb46ab3d33ed6 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-05-18 5822 if (kvm_memslots_have_rmaps(kvm)) { 91f65ea3582813 arch/x86/kvm/mmu/mmu.c Ben Gardon 2023-08-14 5823 write_lock(&kvm->mmu_lock); d77aa73c7072c5 arch/x86/kvm/mmu.c Xiao Guangrong 2015-05-13 5824 flush = slot_handle_all_level(kvm, memslot, __rmap_set_dirty, false); 91f65ea3582813 arch/x86/kvm/mmu/mmu.c Ben Gardon 2023-08-14 5825 write_unlock(&kvm->mmu_lock); 7eb46ab3d33ed6 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-05-18 5826 } f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5827 ac11ca5ab371f5 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-04-01 5828 if (is_tdp_mmu_enabled(kvm)) { ac11ca5ab371f5 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-04-01 5829 read_lock(&kvm->mmu_lock); ac11ca5ab371f5 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-04-01 5830 flush |= kvm_tdp_mmu_slot_set_dirty(kvm, memslot); ac11ca5ab371f5 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-04-01 5831 read_unlock(&kvm->mmu_lock); ac11ca5ab371f5 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-04-01 5832 } ac11ca5ab371f5 arch/x86/kvm/mmu/mmu.c Ben Gardon 2021-04-01 5833 f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 @5834 if (flush) 7f42aa76d4a558 arch/x86/kvm/mmu/mmu.c Sean Christopherson 2020-02-18 5835 kvm_arch_flush_remote_tlbs_memslot(kvm, memslot); f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5836 } f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5837 EXPORT_SYMBOL_GPL(kvm_mmu_slot_set_dirty); f4b4b1808690c3 arch/x86/kvm/mmu.c Kai Huang 2015-01-28 5838

:::::: The code at line 5812 was first introduced by commit :::::: f4b4b1808690c37c7c703d43789c1988c5e7fdeb KVM: MMU: Add mmu help functions to support PML

:::::: TO: Kai Huang kai.huang@linux.intel.com :::::: CC: Paolo Bonzini pbonzini@redhat.com