mmotm 2020-06-20-21-36 uploaded

mmotm 2020-06-20-21-36 uploaded

[akpm]

The mm-of-the-moment snapshot 2020-06-20-21-36 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 5.8-rc1:
(patches marked "*" will be included in linux-next)

  origin.patch
* openrisc-fix-boot-oops-when-debug_vm-is-enabled.patch
* mm-do_swap_page-fix-up-the-error-code-instantiation.patch
* mm-slab-use-memzero_explicit-in-kzfree.patch
* slub-cure-list_slab_objects-from-double-fix.patch
* mm-workingset-age-nonresident-information-alongside-anonymous-pages.patch
* mm-swap-fix-for-mm-workingset-age-nonresident-information-alongside-anonymous-pages.patch
* mm-memory-fix-io-cost-for-anonymous-page.patch
* mm-fix-swap-cache-node-allocation-mask.patch
* mm-memoryc-properly-pte_offset_map_lock-unlock-in-vm_insert_pages.patch
* mm-debug_vm_pgtable-fix-build-failure-with-powerpc-8xx.patch
* mm-memcontrol-handle-div0-crash-race-condition-in-memorylow.patch
* mm-memcontrol-fix-do-not-put-the-css-reference.patch
* mm-memcg-prevent-missed-memorylow-load-tears.patch
* mm-fix-false-softlockup-during-pfn-range-removal.patch
* docs-mm-gup-minor-documentation-update.patch
* doc-thp-cow-fault-no-longer-allocate-thp.patch
* mm-compaction-make-capture-control-handling-safe-wrt-interrupts.patch
* kexec-do-not-verify-the-signature-without-the-lockdown-or-mandatory-signature.patch
* ocfs2-avoid-inode-removed-while-nfsd-access-it.patch
* ocfs2-load-global_inode_alloc.patch
* ocfs2-fix-panic-on-nfs-server-over-ocfs2.patch
* ocfs2-fix-value-of-ocfs2_invalid_slot.patch
* lib-fix-test_hmmc-reference-after-free.patch
* linux-bitsh-fix-unsigned-less-than-zero-warnings.patch
* mm-slab-fix-sign-conversion-problem-in-memcg_uncharge_slab.patch
* x86-hyperv-allocate-the-hypercall-page-with-only-read-and-execute-bits.patch
* arm64-use-page_kernel_rox-directly-in-alloc_insn_page.patch
* mm-remove-vmalloc_exec.patch
* proc-kpageflags-prevent-an-integer-overflow-in-stable_page_flags.patch
* proc-kpageflags-do-not-use-uninitialized-struct-pages.patch
* checkpatch-test-git_dir-changes.patch
* scripts-tagssh-collect-compiled-source-precisely.patch
* bloat-o-meter-support-comparing-library-archives.patch
* ocfs2-clear-links-count-in-ocfs2_mknod-if-an-error-occurs.patch
* ocfs2-fix-ocfs2-corrupt-when-iputting-an-inode.patch
* drivers-tty-serial-sh-scic-suppress-uninitialized-var-warning.patch
* ramfs-support-o_tmpfile.patch
* kernel-watchdog-flush-all-printk-nmi-buffers-when-hardlockup-detected.patch
  mm.patch
* mm-treewide-rename-kzfree-to-kfree_sensitive.patch
* mm-ksize-should-silently-accept-a-null-pointer.patch
* mm-slub-extend-slub_debug-syntax-for-multiple-blocks.patch
* mm-slub-make-some-slub_debug-related-attributes-read-only.patch
* mm-slub-remove-runtime-allocation-order-changes.patch
* mm-slub-make-remaining-slub_debug-related-attributes-read-only.patch
* mm-slub-make-reclaim_account-attribute-read-only.patch
* mm-slub-introduce-static-key-for-slub_debug.patch
* mm-slub-introduce-kmem_cache_debug_flags.patch
* mm-slub-introduce-kmem_cache_debug_flags-fix.patch
* mm-slub-extend-checks-guarded-by-slub_debug-static-key.patch
* mm-slab-slub-move-and-improve-cache_from_obj.patch
* mm-slab-slub-improve-error-reporting-and-overhead-of-cache_from_obj.patch
* slub-drop-lockdep_assert_held-from-put_map.patch
* mm-kcsan-instrument-slab-slub-free-with-assert_exclusive_access.patch
* mm-memcg-factor-out-memcg-and-lruvec-level-changes-out-of-__mod_lruvec_state.patch
* mm-memcg-prepare-for-byte-sized-vmstat-items.patch
* mm-memcg-convert-vmstat-slab-counters-to-bytes.patch
* mm-slub-implement-slub-version-of-obj_to_index.patch
* mm-memcontrol-decouple-reference-counting-from-page-accounting.patch
* mm-memcg-slab-obj_cgroup-api.patch
* mm-memcg-slab-obj_cgroup-api-fix.patch
* mm-memcg-slab-allocate-obj_cgroups-for-non-root-slab-pages.patch
* mm-memcg-slab-allocate-obj_cgroups-for-non-root-slab-pages-fix.patch
* mm-memcg-slab-save-obj_cgroup-for-non-root-slab-objects.patch
* mm-memcg-slab-charge-individual-slab-objects-instead-of-pages.patch
* mm-memcg-slab-deprecate-memorykmemslabinfo.patch
* mm-memcg-slab-move-memcg_kmem_bypass-to-memcontrolh.patch
* mm-memcg-slab-use-a-single-set-of-kmem_caches-for-all-accounted-allocations.patch
* mm-memcg-slab-simplify-memcg-cache-creation.patch
* mm-memcg-slab-remove-memcg_kmem_get_cache.patch
* mm-memcg-slab-deprecate-slab_root_caches.patch
* mm-memcg-slab-remove-redundant-check-in-memcg_accumulate_slabinfo.patch
* mm-memcg-slab-use-a-single-set-of-kmem_caches-for-all-allocations.patch
* mm-memcg-slab-use-a-single-set-of-kmem_caches-for-all-allocations-fix.patch
* kselftests-cgroup-add-kernel-memory-accounting-tests.patch
* tools-cgroup-add-memcg_slabinfopy-tool.patch
* percpu-return-number-of-released-bytes-from-pcpu_free_area.patch
* mm-memcg-percpu-account-percpu-memory-to-memory-cgroups.patch
* mm-memcg-percpu-account-percpu-memory-to-memory-cgroups-fix.patch
* mm-memcg-percpu-account-percpu-memory-to-memory-cgroups-fix-fix.patch
* mm-memcg-percpu-per-memcg-percpu-memory-statistics.patch
* mm-memcg-charge-memcg-percpu-memory-to-the-parent-cgroup.patch
* kselftests-cgroup-add-perpcu-memory-accounting-test.patch
* mm-remove-redundant-check-non_swap_entry.patch
* mm-memoryc-make-remap_pfn_range-reject-unaligned-addr.patch
* mm-move-pd_alloc_track-to-separate-header-file.patch
* mm-mmap-fix-the-adjusted-length-error.patch
* vmalloc-convert-to-xarray.patch
* mm-vmalloc-simplify-merge_or_add_vmap_area-func.patch
* mm-vmalloc-simplify-augment_tree_propagate_check-func.patch
* mm-vmalloc-switch-to-propagate-callback.patch
* mm-page_alloc-use-unlikely-in-task_capc.patch
* mm-track-mmu-notifiers-in-fs_reclaim_acquire-release.patch
* page_alloc-consider-highatomic-reserve-in-watermark-fast.patch
* mm-page_alloc-skip-waternark_boost-for-atomic-order-0-allocations.patch
* mm-page_alloc-skip-watermark_boost-for-atomic-order-0-allocations-fix.patch
* mm-drop-vm_total_pages.patch
* mm-page_alloc-drop-nr_free_pagecache_pages.patch
* mm-vmscanc-fixed-typo.patch
* mm-proactive-compaction.patch
* mm-use-unsigned-types-for-fragmentation-score.patch
* hugetlbfs-prevent-filesystem-stacking-of-hugetlbfs.patch
* mm-thp-remove-debug_cow-switch.patch
* mm-vmstat-add-events-for-pmd-based-thp-migration-without-split.patch
* mm-vmstat-add-events-for-pmd-based-thp-migration-without-split-fix.patch
* mm-vmstat-add-events-for-pmd-based-thp-migration-without-split-update.patch
* mm-cma-fix-null-pointer-dereference-when-cma-could-not-be-activated.patch
* mm-cma-fix-the-name-of-cma-areas.patch
* mm-hugetlb-fix-the-name-of-hugetlb-cma.patch
* sched-mm-optimize-current_gfp_context.patch
* x86-mm-use-max-memory-block-size-on-bare-metal.patch
* mm-zswap-move-to-use-crypto_acomp-api-for-hardware-acceleration.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
* bitmap-fix-bitmap_cut-for-partial-overlapping-case.patch
* bitmap-add-test-for-bitmap_cut.patch
* lib-optimize-cpumask_local_spread.patch
* bits-add-tests-of-genmask.patch
* checkpatch-add-test-for-possible-misuse-of-is_enabled-without-config_.patch
* checkpatch-support-deprecated-terms-checking.patch
* scripts-deprecated_terms-recommend-denylist-allowlist-instead-of-blacklist-whitelist.patch
* fs-signalfdc-fix-inconsistent-return-codes-for-signalfd4.patch
* selftests-kmod-use-variable-name-in-kmod_test_0001.patch
* kmod-remove-redundant-be-an-in-the-comment.patch
* test_kmod-avoid-potential-double-free-in-trigger_config_run_type.patch
* umh-fix-processed-error-when-umh_wait_proc-is-used.patch
* selftests-simplify-kmod-failure-value.patch
* exec-change-uselib2-is_sreg-failure-to-eacces.patch
* exec-move-s_isreg-check-earlier.patch
* exec-move-path_noexec-check-earlier.patch
* umh-fix-refcount-underflow-in-fork_usermode_blob.patch
* kdump-append-kernel-build-id-string-to-vmcoreinfo.patch
* rapidio-rio_mport_cdev-use-struct_size-helper.patch
* rapidio-use-struct_size-helper.patch
* kernel-panicc-make-oops_may_print-return-bool.patch
* lib-kconfigdebug-fix-typo-in-the-help-text-of-config_panic_timeout.patch
* aio-simplify-read_events.patch
* kcov-unconditionally-add-fno-stack-protector-to-compiler-options.patch
  linux-next.patch
  linux-next-git-rejects.patch
* all-arch-remove-system-call-sys_sysctl.patch
* all-arch-remove-system-call-sys_sysctl-fix.patch
* mm-kmemleak-silence-kcsan-splats-in-checksum.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-rmap-annotate-a-data-race-at-tlb_flush_batched.patch
* mm-swap-annotate-data-races-for-lru_rotate_pvecs.patch
* mm-annotate-a-data-race-in-page_zonenum.patch
* include-asm-generic-vmlinuxldsh-align-ro_after_init.patch
* sh-clkfwk-remove-r8-r16-r32.patch
* sh-remove-call-to-memset-after-dma_alloc_coherent.patch
* sh-use-generic-strncpy.patch
* sh-add-missing-export_symbol-for-__delay.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

Re: mmotm 2020-06-20-21-36 uploaded (lkdtm/bugs.c)

[Randy Dunlap]

On 6/20/20 9:37 PM, akpm@linux-foundation.org wrote:
> The mm-of-the-moment snapshot 2020-06-20-21-36 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.

drivers/misc/lkdtm/bugs.c has build errors when building UML for i386
(allmodconfig or allyesconfig):


In file included from ../drivers/misc/lkdtm/bugs.c:17:0:
../arch/x86/um/asm/desc.h:7:0: warning: "LDT_empty" redefined
 #define LDT_empty(info) (\
 
In file included from ../arch/um/include/asm/mmu.h:10:0,
                 from ../include/linux/mm_types.h:18,
                 from ../include/linux/sched/signal.h:13,
                 from ../drivers/misc/lkdtm/bugs.c:11:
../arch/x86/um/asm/mm_context.h:65:0: note: this is the location of the previous definition
 #define LDT_empty(info) (_LDT_empty(info))
 
../drivers/misc/lkdtm/bugs.c: In function ‘lkdtm_DOUBLE_FAULT’:
../drivers/misc/lkdtm/bugs.c:428:9: error: variable ‘d’ has initializer but incomplete type
  struct desc_struct d = {
         ^~~~~~~~~~~
../drivers/misc/lkdtm/bugs.c:429:4: error: ‘struct desc_struct’ has no member named ‘type’
   .type = 3, /* expand-up, writable, accessed data */
    ^~~~
../drivers/misc/lkdtm/bugs.c:429:11: warning: excess elements in struct initializer
   .type = 3, /* expand-up, writable, accessed data */
           ^
../drivers/misc/lkdtm/bugs.c:429:11: note: (near initialization for ‘d’)
../drivers/misc/lkdtm/bugs.c:430:4: error: ‘struct desc_struct’ has no member named ‘p’
   .p = 1,  /* present */
    ^
../drivers/misc/lkdtm/bugs.c:430:8: warning: excess elements in struct initializer
   .p = 1,  /* present */
        ^
../drivers/misc/lkdtm/bugs.c:430:8: note: (near initialization for ‘d’)
../drivers/misc/lkdtm/bugs.c:431:4: error: ‘struct desc_struct’ has no member named ‘d’
   .d = 1,  /* 32-bit */
    ^
../drivers/misc/lkdtm/bugs.c:431:8: warning: excess elements in struct initializer
   .d = 1,  /* 32-bit */
        ^
../drivers/misc/lkdtm/bugs.c:431:8: note: (near initialization for ‘d’)
../drivers/misc/lkdtm/bugs.c:432:4: error: ‘struct desc_struct’ has no member named ‘g’
   .g = 0,  /* limit in bytes */
    ^
../drivers/misc/lkdtm/bugs.c:432:8: warning: excess elements in struct initializer
   .g = 0,  /* limit in bytes */
        ^
../drivers/misc/lkdtm/bugs.c:432:8: note: (near initialization for ‘d’)
../drivers/misc/lkdtm/bugs.c:433:4: error: ‘struct desc_struct’ has no member named ‘s’
   .s = 1,  /* not system */
    ^
../drivers/misc/lkdtm/bugs.c:433:8: warning: excess elements in struct initializer
   .s = 1,  /* not system */
        ^
../drivers/misc/lkdtm/bugs.c:433:8: note: (near initialization for ‘d’)
../drivers/misc/lkdtm/bugs.c:428:21: error: storage size of ‘d’ isn’t known
  struct desc_struct d = {
                     ^
../drivers/misc/lkdtm/bugs.c:437:2: error: implicit declaration of function ‘write_gdt_entry’; did you mean ‘init_wait_entry’? [-Werror=implicit-function-declaration]
  write_gdt_entry(get_cpu_gdt_rw(smp_processor_id()),
  ^~~~~~~~~~~~~~~
  init_wait_entry
../drivers/misc/lkdtm/bugs.c:437:18: error: implicit declaration of function ‘get_cpu_gdt_rw’; did you mean ‘get_cpu_ptr’? [-Werror=implicit-function-declaration]
  write_gdt_entry(get_cpu_gdt_rw(smp_processor_id()),
                  ^~~~~~~~~~~~~~
                  get_cpu_ptr
../drivers/misc/lkdtm/bugs.c:438:27: error: ‘DESCTYPE_S’ undeclared (first use in this function)
    GDT_ENTRY_TLS_MIN, &d, DESCTYPE_S);
                           ^~~~~~~~~~
../drivers/misc/lkdtm/bugs.c:438:27: note: each undeclared identifier is reported only once for each function it appears in
../drivers/misc/lkdtm/bugs.c:428:21: warning: unused variable ‘d’ [-Wunused-variable]
  struct desc_struct d = {
                     ^
cc1: some warnings being treated as errors


-- 
~Randy
Reported-by: Randy Dunlap <rdunlap@infradead.org>

Re: mmotm 2020-06-20-21-36 uploaded (lkdtm/bugs.c)

[Kees Cook]

On Mon, Jun 22, 2020 at 08:37:17AM -0700, Randy Dunlap wrote:
> On 6/20/20 9:37 PM, akpm@linux-foundation.org wrote:
> > The mm-of-the-moment snapshot 2020-06-20-21-36 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.
> 
> drivers/misc/lkdtm/bugs.c has build errors when building UML for i386
> (allmodconfig or allyesconfig):
> 
> 
> In file included from ../drivers/misc/lkdtm/bugs.c:17:0:
> ../arch/x86/um/asm/desc.h:7:0: warning: "LDT_empty" redefined
>  #define LDT_empty(info) (\
>  
> In file included from ../arch/um/include/asm/mmu.h:10:0,
>                  from ../include/linux/mm_types.h:18,
>                  from ../include/linux/sched/signal.h:13,
>                  from ../drivers/misc/lkdtm/bugs.c:11:
> ../arch/x86/um/asm/mm_context.h:65:0: note: this is the location of the previous definition
>  #define LDT_empty(info) (_LDT_empty(info))

The LKDTM test landed a while ago:
b09511c253e5 ("lkdtm: Add a DOUBLE_FAULT crash type on x86")

and nothing has touched arch/x86/um/asm/desc.h nor
arch/x86/um/asm/mm_context.h in a while either.

Regardless, it seems arch/x86/um/asm/desc.h is not needed any more?

-- 
Kees Cook

Re: mmotm 2020-06-20-21-36 uploaded (lkdtm/bugs.c)

[Richard Weinberger]

On Mon, Jun 22, 2020 at 11:51 PM Kees Cook <keescook@chromium.org> wrote:
>
> On Mon, Jun 22, 2020 at 08:37:17AM -0700, Randy Dunlap wrote:
> > On 6/20/20 9:37 PM, akpm@linux-foundation.org wrote:
> > > The mm-of-the-moment snapshot 2020-06-20-21-36 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.
> >
> > drivers/misc/lkdtm/bugs.c has build errors when building UML for i386
> > (allmodconfig or allyesconfig):
> >
> >
> > In file included from ../drivers/misc/lkdtm/bugs.c:17:0:
> > ../arch/x86/um/asm/desc.h:7:0: warning: "LDT_empty" redefined
> >  #define LDT_empty(info) (\
> >
> > In file included from ../arch/um/include/asm/mmu.h:10:0,
> >                  from ../include/linux/mm_types.h:18,
> >                  from ../include/linux/sched/signal.h:13,
> >                  from ../drivers/misc/lkdtm/bugs.c:11:
> > ../arch/x86/um/asm/mm_context.h:65:0: note: this is the location of the previous definition
> >  #define LDT_empty(info) (_LDT_empty(info))
>
> The LKDTM test landed a while ago:
> b09511c253e5 ("lkdtm: Add a DOUBLE_FAULT crash type on x86")
>
> and nothing has touched arch/x86/um/asm/desc.h nor
> arch/x86/um/asm/mm_context.h in a while either.
>
> Regardless, it seems arch/x86/um/asm/desc.h is not needed any more?

True that, we can rip the file.

-- 
Thanks,
//richard