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* mmotm 2020-05-05-15-28 uploaded @ 2020-05-05 22:29 akpm [not found] ` <36dc367a-f647-4ee8-a327-d1c3457a7940@infradead.org> 0 siblings, 1 reply; 4+ messages in thread From: akpm @ 2020-05-05 22:29 UTC (permalink / raw) To: broonie, linux-fsdevel, linux-kernel, linux-mm, linux-next, mhocko, mm-commits, sfr The mm-of-the-moment snapshot 2020-05-05-15-28 has been uploaded to http://www.ozlabs.org/~akpm/mmotm/ mmotm-readme.txt says README for mm-of-the-moment: http://www.ozlabs.org/~akpm/mmotm/ This is a snapshot of my -mm patch queue. Uploaded at random hopefully more than once a week. You will need quilt to apply these patches to the latest Linus release (5.x or 5.x-rcY). The series file is in broken-out.tar.gz and is duplicated in http://ozlabs.org/~akpm/mmotm/series The file broken-out.tar.gz contains two datestamp files: .DATE and .DATE-yyyy-mm-dd-hh-mm-ss. Both contain the string yyyy-mm-dd-hh-mm-ss, followed by the base kernel version against which this patch series is to be applied. This tree is partially included in linux-next. To see which patches are included in linux-next, consult the `series' file. Only the patches within the #NEXT_PATCHES_START/#NEXT_PATCHES_END markers are included in linux-next. A full copy of the full kernel tree with the linux-next and mmotm patches already applied is available through git within an hour of the mmotm release. Individual mmotm releases are tagged. The master branch always points to the latest release, so it's constantly rebasing. https://github.com/hnaz/linux-mm The directory http://www.ozlabs.org/~akpm/mmots/ (mm-of-the-second) contains daily snapshots of the -mm tree. It is updated more frequently than mmotm, and is untested. A git copy of this tree is also available at https://github.com/hnaz/linux-mm This mmotm tree contains the following patches against 5.7-rc4: (patches marked "*" will be included in linux-next) origin.patch * checkpatch-test-git_dir-changes.patch * proc-kpageflags-prevent-an-integer-overflow-in-stable_page_flags.patch * proc-kpageflags-do-not-use-uninitialized-struct-pages.patch * ipc-mqueuec-change-__do_notify-to-bypass-check_kill_permission-v2.patch * mm-memcg-fix-error-return-value-of-mem_cgroup_css_alloc.patch * mm-memcg-fix-error-return-value-of-mem_cgroup_css_alloc-fix.patch * kcov-cleanup-debug-messages.patch * kcov-fix-potential-use-after-free-in-kcov_remote_start.patch * kcov-move-t-kcov-assignments-into-kcov_start-stop.patch * kcov-move-t-kcov_sequence-assignment.patch * kcov-use-t-kcov_mode-as-enabled-indicator.patch * kcov-collect-coverage-from-interrupts.patch * usb-core-kcov-collect-coverage-from-usb-complete-callback.patch * mm-page_alloc-fix-watchdog-soft-lockups-during-set_zone_contiguous.patch * kernel-kcovc-fix-typos-in-kcov_remote_start-documentation.patch * scripts-decodecode-fix-trapping-instruction-formatting.patch * kvm-svm-change-flag-passed-to-gup-fast-in-sev_pin_memory.patch * memcg-optimize-memorynuma_stat-like-memorystat.patch * eventpoll-fix-missing-wakeup-for-ovflist-in-ep_poll_callback.patch * eventpoll-fix-missing-wakeup-for-ovflist-in-ep_poll_callback-v2.patch * scripts-gdb-repair-rb_first-and-rb_last.patch * mm-slub-fix-incorrect-interpretation-of-s-offset.patch * percpu-make-pcpu_alloc-aware-of-current-gfp-context.patch * kselftests-introduce-new-epoll60-testcase-for-catching-lost-wakeups.patch * epoll-atomically-remove-wait-entry-on-wake-up.patch * mm-vmscan-remove-unnecessary-argument-description-of-isolate_lru_pages.patch * ubsan-disable-ubsan_alignment-under-compile_test.patch * mm-limit-boost_watermark-on-small-zones.patch * mm-memcg-fix-inconsistent-oom-event-behavior.patch * epoll-call-final-ep_events_available-check-under-the-lock.patch * mm-gup-fix-fixup_user_fault-on-multiple-retries.patch * scripts-support-compiled-source-improved-precise.patch * scripts-add-a-intermediate-file-for-make-gtags.patch * squashfs-migrate-from-ll_rw_block-usage-to-bio.patch * squashfs-migrate-from-ll_rw_block-usage-to-bio-fix.patch * ocfs2-add-missing-annotation-for-dlm_empty_lockres.patch * ocfs2-mount-shared-volume-without-ha-stack.patch * drivers-tty-serial-sh-scic-suppress-uninitialized-var-warning.patch * ramfs-support-o_tmpfile.patch * vfs-track-per-sb-writeback-errors-and-report-them-to-syncfs.patch * buffer-record-blockdev-write-errors-in-super_block-that-it-backs.patch * kernel-watchdog-flush-all-printk-nmi-buffers-when-hardlockup-detected.patch mm.patch * usercopy-mark-dma-kmalloc-caches-as-usercopy-caches.patch * mm-slub-fix-corrupted-freechain-in-deactivate_slab.patch * mm-slub-fix-corrupted-freechain-in-deactivate_slab-fix.patch * slub-remove-userspace-notifier-for-cache-add-remove.patch * slub-remove-kmalloc-under-list_lock-from-list_slab_objects.patch * mm-slub-fix-stack-overruns-with-slub_stats.patch * mm-slub-add-panic_on_error-to-the-debug-facilities.patch * mm-slub-add-panic_on_error-to-the-debug-facilities-fix.patch * slub-limit-count-of-partial-slabs-scanned-to-gather-statistics.patch * mm-dump_page-do-not-crash-with-invalid-mapping-pointer.patch * mm-move-readahead-prototypes-from-mmh.patch * mm-return-void-from-various-readahead-functions.patch * mm-ignore-return-value-of-readpages.patch * mm-move-readahead-nr_pages-check-into-read_pages.patch * mm-add-new-readahead_control-api.patch * mm-use-readahead_control-to-pass-arguments.patch * mm-rename-various-offset-parameters-to-index.patch * mm-rename-readahead-loop-variable-to-i.patch * mm-remove-page_offset-from-readahead-loop.patch * mm-put-readahead-pages-in-cache-earlier.patch * mm-add-readahead-address-space-operation.patch * mm-move-end_index-check-out-of-readahead-loop.patch * mm-add-page_cache_readahead_unbounded.patch * mm-document-why-we-dont-set-pagereadahead.patch * mm-use-memalloc_nofs_save-in-readahead-path.patch * fs-convert-mpage_readpages-to-mpage_readahead.patch * btrfs-convert-from-readpages-to-readahead.patch * erofs-convert-uncompressed-files-from-readpages-to-readahead.patch * erofs-convert-compressed-files-from-readpages-to-readahead.patch * ext4-convert-from-readpages-to-readahead.patch * ext4-pass-the-inode-to-ext4_mpage_readpages.patch * f2fs-convert-from-readpages-to-readahead.patch * f2fs-pass-the-inode-to-f2fs_mpage_readpages.patch * fuse-convert-from-readpages-to-readahead.patch * fuse-convert-from-readpages-to-readahead-fix.patch * iomap-convert-from-readpages-to-readahead.patch * mm-gupc-updating-the-documentation.patch * mm-gupc-updating-the-documentation-fix.patch * mm-swapfile-use-list_prevnext_entry-instead-of-open-coding.patch * mm-swap_state-fix-a-data-race-in-swapin_nr_pages.patch * mm-swap-properly-update-readahead-statistics-in-unuse_pte_range.patch * mm-swapfilec-offset-is-only-used-when-there-is-more-slots.patch * mm-swapfilec-explicitly-show-ssd-non-ssd-is-handled-mutually-exclusive.patch * mm-swapfilec-remove-the-unnecessary-goto-for-ssd-case.patch * mm-swapfilec-simplify-the-calculation-of-n_goal.patch * mm-swapfilec-remove-the-extra-check-in-scan_swap_map_slots.patch * mm-swapfilec-found_free-could-be-represented-by-tmp-max.patch * mm-swapfilec-tmp-is-always-smaller-than-max.patch * mm-swapfilec-omit-a-duplicate-code-by-compare-tmp-and-max-first.patch * swap-try-to-scan-more-free-slots-even-when-fragmented.patch * mm-swapfilec-classify-swap_map_xxx-to-make-it-more-readable.patch * mm-swapfilec-classify-swap_map_xxx-to-make-it-more-readable-fix.patch * mm-swapfilec-__swap_entry_free-always-free-1-entry.patch * mm-memcg-add-workingset_restore-in-memorystat.patch * mm-memcg-avoid-stale-protection-values-when-cgroup-is-above-protection.patch * mm-memcg-decouple-elowmin-state-mutations-from-protection-checks.patch * h8300-remove-usage-of-__arch_use_5level_hack.patch * arm-add-support-for-folded-p4d-page-tables.patch * arm64-add-support-for-folded-p4d-page-tables.patch * arm64-add-support-for-folded-p4d-page-tables-fix.patch * hexagon-remove-__arch_use_5level_hack.patch * ia64-add-support-for-folded-p4d-page-tables.patch * nios2-add-support-for-folded-p4d-page-tables.patch * openrisc-add-support-for-folded-p4d-page-tables.patch * powerpc-add-support-for-folded-p4d-page-tables.patch * powerpc-add-support-for-folded-p4d-page-tables-fix.patch * sh-fault-modernize-printing-of-kernel-messages.patch * sh-drop-__pxd_offset-macros-that-duplicate-pxd_index-ones.patch * sh-add-support-for-folded-p4d-page-tables.patch * unicore32-remove-__arch_use_5level_hack.patch * asm-generic-remove-pgtable-nop4d-hackh.patch * mm-remove-__arch_has_5level_hack-and-include-asm-generic-5level-fixuph.patch * mm-gupc-further-document-vma_permits_fault.patch * proc-pid-smaps-add-pmd-migration-entry-parsing.patch * mm-mmap-fix-the-adjusted-length-error.patch * mm-memory-remove-unnecessary-pte_devmap-case-in-copy_one_pte.patch * x86-hyperv-use-vmalloc_exec-for-the-hypercall-page.patch * x86-fix-vmap-arguments-in-map_irq_stack.patch * staging-android-ion-use-vmap-instead-of-vm_map_ram.patch * staging-media-ipu3-use-vmap-instead-of-reimplementing-it.patch * dma-mapping-use-vmap-insted-of-reimplementing-it.patch * powerpc-add-an-ioremap_phb-helper.patch * powerpc-remove-__ioremap_at-and-__iounmap_at.patch * mm-remove-__get_vm_area.patch * mm-unexport-unmap_kernel_range_noflush.patch * mm-rename-config_pgtable_mapping-to-config_zsmalloc_pgtable_mapping.patch * mm-only-allow-page-table-mappings-for-built-in-zsmalloc.patch * mm-pass-addr-as-unsigned-long-to-vb_free.patch * mm-remove-vmap_page_range_noflush-and-vunmap_page_range.patch * mm-rename-vmap_page_range-to-map_kernel_range.patch * mm-dont-return-the-number-of-pages-from-map_kernel_range_noflush.patch * mm-remove-map_vm_range.patch * mm-remove-unmap_vmap_area.patch * mm-remove-the-prot-argument-from-vm_map_ram.patch * mm-enforce-that-vmap-cant-map-pages-executable.patch * gpu-drm-remove-the-powerpc-hack-in-drm_legacy_sg_alloc.patch * mm-remove-the-pgprot-argument-to-__vmalloc.patch * mm-remove-the-prot-argument-to-__vmalloc_node.patch * mm-remove-both-instances-of-__vmalloc_node_flags.patch * mm-remove-__vmalloc_node_flags_caller.patch * mm-remove-__vmalloc_node_flags_caller-fix.patch * mm-switch-the-test_vmalloc-module-to-use-__vmalloc_node.patch * mm-switch-the-test_vmalloc-module-to-use-__vmalloc_node-fix.patch * mm-switch-the-test_vmalloc-module-to-use-__vmalloc_node-fix-fix.patch * mm-remove-vmalloc_user_node_flags.patch * mm-remove-vmalloc_user_node_flags-fix.patch * arm64-use-__vmalloc_node-in-arch_alloc_vmap_stack.patch * powerpc-use-__vmalloc_node-in-alloc_vm_stack.patch * s390-use-__vmalloc_node-in-stack_alloc.patch * mm-init-report-kasan-tag-information-stored-in-page-flags.patch * kasan-stop-tests-being-eliminated-as-dead-code-with-fortify_source.patch * kasan-stop-tests-being-eliminated-as-dead-code-with-fortify_source-v4.patch * stringh-fix-incompatibility-between-fortify_source-and-kasan.patch * mm-clarify-__gfp_memalloc-usage.patch * mm-memblock-replace-dereferences-of-memblock_regionnid-with-api-calls.patch * mm-make-early_pfn_to_nid-and-related-defintions-close-to-each-other.patch * mm-remove-config_have_memblock_node_map-option.patch * mm-free_area_init-use-maximal-zone-pfns-rather-than-zone-sizes.patch * mm-use-free_area_init-instead-of-free_area_init_nodes.patch * alpha-simplify-detection-of-memory-zone-boundaries.patch * arm-simplify-detection-of-memory-zone-boundaries.patch * arm64-simplify-detection-of-memory-zone-boundaries-for-uma-configs.patch * csky-simplify-detection-of-memory-zone-boundaries.patch * m68k-mm-simplify-detection-of-memory-zone-boundaries.patch * parisc-simplify-detection-of-memory-zone-boundaries.patch * sparc32-simplify-detection-of-memory-zone-boundaries.patch * unicore32-simplify-detection-of-memory-zone-boundaries.patch * xtensa-simplify-detection-of-memory-zone-boundaries.patch * mm-memmap_init-iterate-over-memblock-regions-rather-that-check-each-pfn.patch * mm-memmap_init-iterate-over-memblock-regions-rather-that-check-each-pfn-fix.patch * mm-remove-early_pfn_in_nid-and-config_nodes_span_other_nodes.patch * mm-free_area_init-allow-defining-max_zone_pfn-in-descending-order.patch * mm-free_area_init-allow-defining-max_zone_pfn-in-descending-order-fix.patch * mm-rename-free_area_init_node-to-free_area_init_memoryless_node.patch * mm-clean-up-free_area_init_node-and-its-helpers.patch * mm-simplify-find_min_pfn_with_active_regions.patch * docs-vm-update-memory-models-documentation.patch * mm-page_allocc-bad_-is-not-necessary-when-pagehwpoison.patch * mm-page_allocc-bad_flags-is-not-necessary-for-bad_page.patch * mm-page_allocc-rename-free_pages_check_bad-to-check_free_page_bad.patch * mm-page_allocc-rename-free_pages_check-to-check_free_page.patch * mm-page_allocc-extract-check__page_bad-common-part-to-page_bad_reason.patch * mmpage_alloccma-conditionally-prefer-cma-pageblocks-for-movable-allocations.patch * mmpage_alloccma-conditionally-prefer-cma-pageblocks-for-movable-allocations-fix.patch * mm-call-touch_nmi_watchdog-on-max-order-boundaries-in-deferred-init.patch * mm-initialize-deferred-pages-with-interrupts-enabled.patch * mm-call-cond_resched-from-deferred_init_memmap.patch * mm-remove-unused-free_bootmem_with_active_regions.patch * mm-page_allocc-only-tune-sysctl_lowmem_reserve_ratio-value-once-when-changing-it.patch * mm-page_allocc-clear-out-zone-lowmem_reserve-if-the-zone-is-empty.patch * mm-vmstatc-do-not-show-lowmem-reserve-protection-information-of-empty-zone.patch * mm-page_alloc-use-ac-high_zoneidx-for-classzone_idx.patch * mm-page_alloc-integrate-classzone_idx-and-high_zoneidx.patch * mm-page_allocc-use-node_mask_none-in-build_zonelists.patch * mm-rename-gfpflags_to_migratetype-to-gfp_migratetype-for-same-convention.patch * mm-vmscanc-use-update_lru_size-in-update_lru_sizes.patch * mm-vmscan-count-layzfree-pages-and-fix-nr_isolated_-mismatch.patch * mm-vmscanc-change-prototype-for-shrink_page_list.patch * mm-vmscan-update-the-comment-of-should_continue_reclaim.patch * tools-vm-page_owner_sort-filter-out-unneeded-line.patch * mm-mempolicy-fix-up-gup-usage-in-lookup_node.patch * hugetlb_cgroup-remove-unused-variable-i.patch * khugepaged-add-self-test.patch * khugepaged-add-self-test-fix.patch * khugepaged-add-self-test-fix-2.patch * khugepaged-add-self-test-fix-2-fix.patch * khugepaged-do-not-stop-collapse-if-less-than-half-ptes-are-referenced.patch * khugepaged-drain-all-lru-caches-before-scanning-pages.patch * khugepaged-drain-lru-add-pagevec-after-swapin.patch * khugepaged-allow-to-collapse-a-page-shared-across-fork.patch * khugepaged-allow-to-collapse-pte-mapped-compound-pages.patch * thp-change-cow-semantics-for-anon-thp.patch * khugepaged-introduce-max_ptes_shared-tunable.patch * khugepaged-introduce-max_ptes_shared-tunable-fix.patch * hugetlbfs-add-arch_hugetlb_valid_size.patch * hugetlbfs-move-hugepagesz=-parsing-to-arch-independent-code.patch * hugetlbfs-remove-hugetlb_add_hstate-warning-for-existing-hstate.patch * hugetlbfs-remove-hugetlb_add_hstate-warning-for-existing-hstate-fix.patch * hugetlbfs-clean-up-command-line-processing.patch * hugetlbfs-move-hugepagesz=-parsing-to-arch-independent-code-fix.patch * mm-hugetlb-avoid-unnecessary-check-on-pud-and-pmd-entry-in-huge_pte_offset.patch * arch-kmap-remove-bug_on.patch * arch-xtensa-move-kmap-build-bug-out-of-the-way.patch * arch-kmap-remove-redundant-arch-specific-kmaps.patch * arch-kunmap-remove-duplicate-kunmap-implementations.patch * x86powerpcmicroblaze-kmap-move-preempt-disable.patch * arch-kmap_atomic-consolidate-duplicate-code.patch * arch-kunmap_atomic-consolidate-duplicate-code.patch * arch-kmap-ensure-kmap_prot-visibility.patch * arch-kmap-dont-hard-code-kmap_prot-values.patch * arch-kmap-define-kmap_atomic_prot-for-all-archs.patch * drm-remove-drm-specific-kmap_atomic-code.patch * kmap-remove-kmap_atomic_to_page.patch * parisc-kmap-remove-duplicate-kmap-code.patch * mm-thp-dont-need-drain-lru-cache-when-splitting-and-mlocking-thp.patch * powerpc-mm-drop-platform-defined-pmd_mknotpresent.patch * mm-thp-rename-pmd_mknotpresent-as-pmd_mknotvalid.patch * mm-thp-rename-pmd_mknotpresent-as-pmd_mkinvalid-v2.patch * drivers-base-memoryc-cache-memory-blocks-in-xarray-to-accelerate-lookup.patch * drivers-base-memoryc-cache-memory-blocks-in-xarray-to-accelerate-lookup-fix.patch * mm-add-debug_wx-support.patch * mm-add-debug_wx-support-fixpatch-added-to-mm-tree.patch * riscv-support-debug_wx.patch * riscv-support-debug_wx-fix.patch * x86-mm-use-arch_has_debug_wx-instead-of-arch-defined.patch * arm64-mm-use-arch_has_debug_wx-instead-of-arch-defined.patch * mm-add-kvfree_sensitive-for-freeing-sensitive-data-objects.patch * mm-memory_hotplug-refrain-from-adding-memory-into-an-impossible-node.patch * powerpc-pseries-hotplug-memory-stop-checking-is_mem_section_removable.patch * mm-memory_hotplug-remove-is_mem_section_removable.patch * mm-memory_hotplug-set-node_start_pfn-of-hotadded-pgdat-to-0.patch * mm-memory_hotplug-handle-memblocks-only-with-config_arch_keep_memblock.patch * mm-replace-zero-length-array-with-flexible-array-member.patch * mm-replace-zero-length-array-with-flexible-array-member-fix.patch * mm-memory_hotplug-fix-a-typo-in-comment-recoreded-recorded.patch * mm-ksm-fix-a-typo-in-comment-alreaady-already.patch * mm-ksm-fix-a-typo-in-comment-alreaady-already-v2.patch * mm-mmap-fix-a-typo-in-comment-compatbility-compatibility.patch * mm-hugetlb-fix-a-typo-in-comment-manitained-maintained.patch * mm-hugetlb-fix-a-typo-in-comment-manitained-maintained-v2.patch * mm-hugetlb-fix-a-typo-in-comment-manitained-maintained-v2-checkpatch-fixes.patch * mm-vmsan-fix-some-typos-in-comment.patch * mm-compaction-fix-a-typo-in-comment-pessemistic-pessimistic.patch * mm-memblock-fix-a-typo-in-comment-implict-implicit.patch * mm-list_lru-fix-a-typo-in-comment-numbesr-numbers.patch * mm-filemap-fix-a-typo-in-comment-unneccssary-unnecessary.patch * mm-frontswap-fix-some-typos-in-frontswapc.patch * mm-memcg-fix-some-typos-in-memcontrolc.patch * mm-fix-a-typo-in-comment-strucure-structure.patch * mm-slub-fix-a-typo-in-comment-disambiguiation-disambiguation.patch * mm-sparse-fix-a-typo-in-comment-convienence-convenience.patch * mm-page-writeback-fix-a-typo-in-comment-effictive-effective.patch * mm-memory-fix-a-typo-in-comment-attampt-attempt.patch * mm-use-false-for-bool-variable.patch * mm-return-true-in-cpupid_pid_unset.patch * info-task-hung-in-generic_file_write_iter.patch * info-task-hung-in-generic_file_write-fix.patch * kernel-hung_taskc-monitor-killed-tasks.patch * proc-rename-catch-function-argument.patch * x86-mm-define-mm_p4d_folded.patch * mm-debug-add-tests-validating-architecture-page-table-helpers.patch * mm-debug-add-tests-validating-architecture-page-table-helpers-v17.patch * mm-debug-add-tests-validating-architecture-page-table-helpers-v18.patch * userc-make-uidhash_table-static.patch * dynamic_debug-add-an-option-to-enable-dynamic-debug-for-modules-only.patch * dynamic_debug-add-an-option-to-enable-dynamic-debug-for-modules-only-v2.patch * get_maintainer-add-email-addresses-from-yaml-files.patch * bitops-avoid-clang-shift-count-overflow-warnings.patch * lib-math-avoid-trailing-n-hidden-in-pr_fmt.patch * lib-add-might_fault-to-strncpy_from_user.patch * lib-optimize-cpumask_local_spread.patch * lib-test_lockupc-make-test_inode-static.patch * checkpatch-additional-maintainer-section-entry-ordering-checks.patch * checkpatch-look-for-c99-comments-in-ctx_locate_comment.patch * checkpatch-disallow-git-and-file-fix.patch * checkpatch-use-patch-subject-when-reading-from-stdin.patch * fs-binfmt_elf-remove-redundant-elf_map-ifndef.patch * elfnote-mark-all-note-sections-shf_alloc.patch * fs-binfmt_elfc-allocate-initialized-memory-in-fill_thread_core_info.patch * fat-dont-allow-to-mount-if-the-fat-length-==-0.patch * fat-improve-the-readahead-for-fat-entries.patch * fs-seq_filec-seq_read-update-pr_info_ratelimited.patch * exec-simplify-the-copy_strings_kernel-calling-convention.patch * exec-open-code-copy_string_kernel.patch * umh-fix-refcount-underflow-in-fork_usermode_blob.patch * kexec-prevent-removal-of-memory-in-use-by-a-loaded-kexec-image.patch * mm-memory_hotplug-allow-arch-override-of-non-boot-memory-resource-names.patch * arm64-memory-give-hotplug-memory-a-different-resource-name.patch * rapidio-avoid-data-race-between-file-operation-callbacks-and-mport_cdev_add.patch * kernel-relayc-fix-read_pos-error-when-multiple-readers.patch * aio-simplify-read_events.patch * add-kernel-config-option-for-twisting-kernel-behavior.patch * twist-allow-disabling-k_spec-function-in-drivers-tty-vt-keyboardc.patch * twist-add-option-for-selecting-twist-options-for-syzkallers-testing.patch * selftests-x86-pkeys-move-selftests-to-arch-neutral-directory.patch * selftests-vm-pkeys-rename-all-references-to-pkru-to-a-generic-name.patch * selftests-vm-pkeys-move-generic-definitions-to-header-file.patch * selftests-vm-pkeys-move-some-definitions-to-arch-specific-header.patch * selftests-vm-pkeys-make-gcc-check-arguments-of-sigsafe_printf.patch * 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sysrq-use-show_stack_loglvl.patch * x86-amd_gart-print-stacktrace-for-a-leak-with-kern_err.patch * power-use-show_stack_loglvl.patch * kdb-dont-play-with-console_loglevel.patch * sched-print-stack-trace-with-kern_info.patch * kernel-use-show_stack_loglvl.patch * kernel-rename-show_stack_loglvl-=-show_stack.patch * mm-frontswap-mark-various-intentional-data-races.patch * mm-page_io-mark-various-intentional-data-races.patch * mm-page_io-mark-various-intentional-data-races-v2.patch * mm-swap_state-mark-various-intentional-data-races.patch * mm-filemap-fix-a-data-race-in-filemap_fault.patch * mm-swapfile-fix-and-annotate-various-data-races.patch * mm-swapfile-fix-and-annotate-various-data-races-v2.patch * mm-page_counter-fix-various-data-races-at-memsw.patch * mm-memcontrol-fix-a-data-race-in-scan-count.patch * mm-list_lru-fix-a-data-race-in-list_lru_count_one.patch * mm-mempool-fix-a-data-race-in-mempool_free.patch * mm-util-annotate-an-data-race-at-vm_committed_as.patch * mm-rmap-annotate-a-data-race-at-tlb_flush_batched.patch * mm-annotate-a-data-race-in-page_zonenum.patch * mm-swap-annotate-data-races-for-lru_rotate_pvecs.patch * net-zerocopy-use-vm_insert_pages-for-tcp-rcv-zerocopy.patch * mm-mmapc-add-more-sanity-checks-to-get_unmapped_area.patch * mm-mmapc-do-not-allow-mappings-outside-of-allowed-limits.patch * mm-pass-task-and-mm-to-do_madvise.patch * mm-introduce-external-memory-hinting-api.patch * mm-introduce-external-memory-hinting-api-fix.patch * mm-check-fatal-signal-pending-of-target-process.patch * pid-move-pidfd_get_pid-function-to-pidc.patch * mm-support-both-pid-and-pidfd-for-process_madvise.patch * mm-madvise-allow-ksm-hints-for-remote-api.patch * mm-support-vector-address-ranges-for-process_madvise.patch * mm-support-vector-address-ranges-for-process_madvise-fix.patch * mm-support-vector-address-ranges-for-process_madvise-fix-fix.patch * mm-support-vector-address-ranges-for-process_madvise-fix-fix-fix.patch * mm-support-vector-address-ranges-for-process_madvise-fix-fix-fix-fix.patch * mm-remove-duplicated-include-from-madvisec.patch * fix-read-buffer-overflow-in-delta-ipc.patch make-sure-nobodys-leaking-resources.patch releasing-resources-with-children.patch mutex-subsystem-synchro-test-module.patch kernel-forkc-export-kernel_thread-to-modules.patch workaround-for-a-pci-restoring-bug.patch ^ permalink raw reply [flat|nested] 4+ messages in thread
[parent not found: <36dc367a-f647-4ee8-a327-d1c3457a7940@infradead.org>]
* Re: mmotm 2020-05-05-15-28 uploaded (objtool warning) [not found] ` <36dc367a-f647-4ee8-a327-d1c3457a7940@infradead.org> @ 2020-05-08 10:38 ` Peter Zijlstra 2020-05-08 16:01 ` Josh Poimboeuf 2020-05-08 17:28 ` Randy Dunlap 0 siblings, 2 replies; 4+ messages in thread From: Peter Zijlstra @ 2020-05-08 10:38 UTC (permalink / raw) To: Randy Dunlap Cc: akpm, broonie, linux-fsdevel, linux-kernel, linux-mm, linux-next, mhocko, mm-commits, sfr, Josh Poimboeuf On Tue, May 05, 2020 at 10:40:43PM -0700, Randy Dunlap wrote: > On 5/5/20 3:29 PM, akpm@linux-foundation.org wrote: > > The mm-of-the-moment snapshot 2020-05-05-15-28 has been uploaded to > > > > http://www.ozlabs.org/~akpm/mmotm/ > > > > mmotm-readme.txt says > > > > README for mm-of-the-moment: > > > > http://www.ozlabs.org/~akpm/mmotm/ > > > > This is a snapshot of my -mm patch queue. Uploaded at random hopefully > > more than once a week. > > > > > on x86_64: > > arch/x86/hyperv/hv_apic.o: warning: objtool: hv_apic_write()+0x25: alternative modifies stack Wheee... this seems to have cured it for me. --- Subject: objtool: Allow no-op CFI ops in alternatives From: Peter Zijlstra <peterz@infradead.org> Date: Fri May 8 12:34:33 CEST 2020 Randy reported a false-positive: "alternative modifies stack". What happens is that: alternative_io("movl %0, %P1", "xchgl %0, %P1", X86_BUG_11AP, 13d: 89 9d 00 d0 7f ff mov %ebx,-0x803000(%rbp) decodes to an instruction with CFI-ops because it modifies RBP. However, due to this being a !frame-pointer build, that should not in fact change the CFI state. So instead of dis-allowing any CFI-op, verify the op would've actually changed the CFI state. Fixes: 7117f16bf460 ("objtool: Fix ORC vs alternatives") Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> --- tools/objtool/check.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -2078,17 +2078,18 @@ static int handle_insn_ops(struct instru struct stack_op *op; list_for_each_entry(op, &insn->stack_ops, list) { + struct cfi_state old_cfi = state->cfi; int res; - if (insn->alt_group) { - WARN_FUNC("alternative modifies stack", insn->sec, insn->offset); - return -1; - } - res = update_cfi_state(insn, &state->cfi, op); if (res) return res; + if (insn->alt_group && memcmp(&state->cfi, &old_cfi, sizeof(struct cfi_state))) { + WARN_FUNC("alternative modifies stack", insn->sec, insn->offset); + return -1; + } + if (op->dest.type == OP_DEST_PUSHF) { if (!state->uaccess_stack) { state->uaccess_stack = 1; ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: mmotm 2020-05-05-15-28 uploaded (objtool warning) 2020-05-08 10:38 ` mmotm 2020-05-05-15-28 uploaded (objtool warning) Peter Zijlstra @ 2020-05-08 16:01 ` Josh Poimboeuf 2020-05-08 17:28 ` Randy Dunlap 1 sibling, 0 replies; 4+ messages in thread From: Josh Poimboeuf @ 2020-05-08 16:01 UTC (permalink / raw) To: Peter Zijlstra Cc: Randy Dunlap, akpm, broonie, linux-fsdevel, linux-kernel, linux-mm, linux-next, mhocko, mm-commits, sfr On Fri, May 08, 2020 at 12:38:30PM +0200, Peter Zijlstra wrote: > Subject: objtool: Allow no-op CFI ops in alternatives > From: Peter Zijlstra <peterz@infradead.org> > Date: Fri May 8 12:34:33 CEST 2020 > > Randy reported a false-positive: "alternative modifies stack". > > What happens is that: > > alternative_io("movl %0, %P1", "xchgl %0, %P1", X86_BUG_11AP, > 13d: 89 9d 00 d0 7f ff mov %ebx,-0x803000(%rbp) > > decodes to an instruction with CFI-ops because it modifies RBP. > However, due to this being a !frame-pointer build, that should not in > fact change the CFI state. > > So instead of dis-allowing any CFI-op, verify the op would've actually > changed the CFI state. > > Fixes: 7117f16bf460 ("objtool: Fix ORC vs alternatives") > Reported-by: Randy Dunlap <rdunlap@infradead.org> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> It helps to put an example of the fixed warning in the commit log, like: This fixes the following warning: arch/x86/hyperv/hv_apic.o: warning: objtool: hv_apic_write()+0x25: alternative modifies stack Otherwise it looks good. Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> -- Josh ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: mmotm 2020-05-05-15-28 uploaded (objtool warning) 2020-05-08 10:38 ` mmotm 2020-05-05-15-28 uploaded (objtool warning) Peter Zijlstra 2020-05-08 16:01 ` Josh Poimboeuf @ 2020-05-08 17:28 ` Randy Dunlap 1 sibling, 0 replies; 4+ messages in thread From: Randy Dunlap @ 2020-05-08 17:28 UTC (permalink / raw) To: Peter Zijlstra Cc: akpm, broonie, linux-fsdevel, linux-kernel, linux-mm, linux-next, mhocko, mm-commits, sfr, Josh Poimboeuf On 5/8/20 3:38 AM, Peter Zijlstra wrote: > On Tue, May 05, 2020 at 10:40:43PM -0700, Randy Dunlap wrote: >> On 5/5/20 3:29 PM, akpm@linux-foundation.org wrote: >>> The mm-of-the-moment snapshot 2020-05-05-15-28 has been uploaded to >>> >>> http://www.ozlabs.org/~akpm/mmotm/ >>> >>> mmotm-readme.txt says >>> >>> README for mm-of-the-moment: >>> >>> http://www.ozlabs.org/~akpm/mmotm/ >>> >>> This is a snapshot of my -mm patch queue. Uploaded at random hopefully >>> more than once a week. >>> >> >> >> on x86_64: >> >> arch/x86/hyperv/hv_apic.o: warning: objtool: hv_apic_write()+0x25: alternative modifies stack > > Wheee... this seems to have cured it for me. > > --- > Subject: objtool: Allow no-op CFI ops in alternatives > From: Peter Zijlstra <peterz@infradead.org> > Date: Fri May 8 12:34:33 CEST 2020 > > Randy reported a false-positive: "alternative modifies stack". > > What happens is that: > > alternative_io("movl %0, %P1", "xchgl %0, %P1", X86_BUG_11AP, > 13d: 89 9d 00 d0 7f ff mov %ebx,-0x803000(%rbp) > > decodes to an instruction with CFI-ops because it modifies RBP. > However, due to this being a !frame-pointer build, that should not in > fact change the CFI state. > > So instead of dis-allowing any CFI-op, verify the op would've actually > changed the CFI state. > > Fixes: 7117f16bf460 ("objtool: Fix ORC vs alternatives") > Reported-by: Randy Dunlap <rdunlap@infradead.org> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Thanks. > --- > tools/objtool/check.c | 11 ++++++----- > 1 file changed, 6 insertions(+), 5 deletions(-) > > --- a/tools/objtool/check.c > +++ b/tools/objtool/check.c > @@ -2078,17 +2078,18 @@ static int handle_insn_ops(struct instru > struct stack_op *op; > > list_for_each_entry(op, &insn->stack_ops, list) { > + struct cfi_state old_cfi = state->cfi; > int res; > > - if (insn->alt_group) { > - WARN_FUNC("alternative modifies stack", insn->sec, insn->offset); > - return -1; > - } > - > res = update_cfi_state(insn, &state->cfi, op); > if (res) > return res; > > + if (insn->alt_group && memcmp(&state->cfi, &old_cfi, sizeof(struct cfi_state))) { > + WARN_FUNC("alternative modifies stack", insn->sec, insn->offset); > + return -1; > + } > + > if (op->dest.type == OP_DEST_PUSHF) { > if (!state->uaccess_stack) { > state->uaccess_stack = 1; > -- ~Randy ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-05-08 17:28 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-05-05 22:29 mmotm 2020-05-05-15-28 uploaded akpm [not found] ` <36dc367a-f647-4ee8-a327-d1c3457a7940@infradead.org> 2020-05-08 10:38 ` mmotm 2020-05-05-15-28 uploaded (objtool warning) Peter Zijlstra 2020-05-08 16:01 ` Josh Poimboeuf 2020-05-08 17:28 ` Randy Dunlap
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