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Naoya Horiguchi 046545a661 mm/hwpoison: fix error page recovered but reported "not recovered" 
When an uncorrected memory error is consumed there is a race between the
CMCI from the memory controller reporting an uncorrected error with a
UCNA signature, and the core reporting and SRAR signature machine check
when the data is about to be consumed.

If the CMCI wins that race, the page is marked poisoned when
uc_decode_notifier() calls memory_failure() and the machine check
processing code finds the page already poisoned.  It calls
kill_accessing_process() to make sure a SIGBUS is sent.  But returns the
wrong error code.

Console log looks like this:

  mce: Uncorrected hardware memory error in user-access at 3710b3400
  Memory failure: 0x3710b3: recovery action for dirty LRU page: Recovered
  Memory failure: 0x3710b3: already hardware poisoned
  Memory failure: 0x3710b3: Sending SIGBUS to einj_mem_uc:361438 due to hardware memory corruption
  mce: Memory error not recovered

kill_accessing_process() is supposed to return -EHWPOISON to notify that
SIGBUS is already set to the process and kill_me_maybe() doesn't have to
send it again.  But current code simply fails to do this, so fix it to
make sure to work as intended.  This change avoids the noise message
"Memory error not recovered" and skips duplicate SIGBUSs.

[tony.luck@intel.com: reword some parts of commit message]

Link: https://lkml.kernel.org/r/20220113231117.1021405-1-naoya.horiguchi@linux.dev
Fixes: a3f5d80ea4 ("mm,hwpoison: send SIGBUS with error virutal address")
Signed-off-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Reported-by: Youquan Song <youquan.song@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2022-03-22 15:57:06 -07:00
..
damon mm/damon: hide kernel pointer from tracepoint event 2022-01-15 16:30:33 +02:00
kasan lib/stackdepot: always do filter_irq_stacks() in stack_depot_save() 2022-01-22 08:33:38 +02:00
kfence kfence: make test case compatible with run time set sample interval 2022-02-11 17:55:00 -08:00
Kconfig mm: enforce pageblock_order < MAX_ORDER 2022-03-22 15:57:06 -07:00
Kconfig.debug mm: page table check 2022-01-15 16:30:28 +02:00
Makefile mm: remove cleancache 2022-01-22 08:33:38 +02:00
backing-dev.c remove congestion tracking framework 2022-03-22 15:57:01 -07:00
balloon_compaction.c
…
bootmem_info.c bootmem: Use page->index instead of page->freelist 2022-01-06 12:27:03 +01:00
cma.c cma: factor out minimum alignment requirement 2022-03-22 15:57:05 -07:00
cma.h
…
cma_debug.c
…
cma_sysfs.c
…
compaction.c mm: compaction: fix the migration stats in trace_mm_compaction_migratepages() 2022-01-15 16:30:30 +02:00
debug.c mm,fs: split dump_mapping() out from dump_page() 2022-01-15 16:30:26 +02:00
debug_page_ref.c
…
debug_vm_pgtable.c mm/debug_vm_pgtable: remove pte entry from the page table 2022-02-04 09:25:04 -08:00
dmapool.c mm/dmapool.c: revert "make dma pool to use kmalloc_node" 2022-01-15 16:30:28 +02:00
early_ioremap.c mm/early_ioremap.c: remove redundant early_ioremap_shutdown() 2021-09-08 11:50:24 -07:00
fadvise.c remove inode_congested() 2022-03-22 15:57:01 -07:00
failslab.c
…
filemap.c tmpfs: do not allocate pages on read 2022-03-22 15:57:02 -07:00
folio-compat.c filemap: Add filemap_release_folio() 2022-01-04 13:15:34 -05:00
frontswap.c frontswap: remove support for multiple ops 2022-01-22 08:33:38 +02:00
gup.c mm/gup: remove unused get_user_pages_locked() 2022-03-22 15:57:01 -07:00
gup_test.c
…
gup_test.h
…
highmem.c Fixes for 5.16 folios: 2021-11-25 10:13:56 -08:00
hmm.c mm/hmm.c: allow VM_MIXEDMAP to work with hmm_range_fault 2022-01-15 16:30:31 +02:00
huge_memory.c mm: thp: fix wrong cache flush in remove_migration_pmd() 2022-03-22 15:57:04 -07:00
hugetlb.c mm: hugetlb: fix missing cache flush in hugetlb_mcopy_atomic_pte() 2022-03-22 15:57:04 -07:00
hugetlb_cgroup.c hugetlb: add hugetlb.*.numa_stat file 2022-01-15 16:30:29 +02:00
hugetlb_vmemmap.c
…
hugetlb_vmemmap.h
…
hwpoison-inject.c mm: hwpoison: don't drop slab caches for offlining non-LRU page 2021-09-03 09:58:15 -07:00
init-mm.c mm: add setup_initial_init_mm() helper 2021-07-08 11:48:21 -07:00
internal.h mm/sparse: make mminit_validate_memmodel_limits() static 2022-03-22 15:57:05 -07:00
interval_tree.c
…
io-mapping.c
…
ioremap.c mm: move ioremap_page_range to vmalloc.c 2021-09-08 11:50:24 -07:00
khugepaged.c mm/page_table_check: check entries at pmd levels 2022-02-04 09:25:04 -08:00
kmemleak.c mm/kmemleak: avoid scanning potential huge holes 2022-02-04 09:25:05 -08:00
ksm.c mm: ksm: fix use-after-free kasan report in ksm_might_need_to_copy 2022-01-15 16:30:31 +02:00
list_lru.c mm: memcontrol: rename memcg_cache_id to memcg_kmem_id 2022-03-22 15:57:04 -07:00
maccess.c ARM: 9115/1: mm/maccess: fix unaligned copy_{from,to}_kernel_nofault 2021-08-20 11:39:25 +01:00
madvise.c mm: fix use-after-free when anon vma name is used after vma is freed 2022-03-05 11:08:32 -08:00
mapping_dirty_helpers.c mm: move tlb_flush_pending inline helpers to mm_inline.h 2022-01-15 16:30:27 +02:00
memblock.c memblock: use kfree() to release kmalloced memblock regions 2022-02-20 08:45:39 +02:00
memcontrol.c mm: memcontrol: fix cannot alloc the maximum memcg ID 2022-03-22 15:57:03 -07:00
memfd.c memfd: fix F_SEAL_WRITE after shmem huge page allocated 2022-03-05 11:08:32 -08:00
memory-failure.c mm/hwpoison: fix error page recovered but reported "not recovered" 2022-03-22 15:57:06 -07:00
memory.c mm/memory.c: use helper macro min and max in unmap_mapping_range_tree() 2022-03-22 15:57:05 -07:00
memory_hotplug.c treewide: Add missing includes masked by cgroup -> bpf dependency 2021-12-03 10:58:13 -08:00
mempolicy.c mm: change lookup_node() to use get_user_pages_fast() 2022-03-22 15:57:01 -07:00
mempool.c mm: remove spurious blkdev.h includes 2021-10-18 06:17:01 -06:00
memremap.c mm/memremap: avoid calling kasan_remove_zero_shadow() for device private memory 2022-03-22 15:57:01 -07:00
memtest.c
…
migrate.c mm: replace multiple dcache flush with flush_dcache_folio() 2022-03-22 15:57:04 -07:00
mincore.c
…
mlock.c mm: refactor vm_area_struct::anon_vma_name usage code 2022-03-05 11:08:32 -08:00
mm_init.c
…
mmap.c mm/mmap: remove obsolete comment in ksys_mmap_pgoff 2022-03-22 15:57:05 -07:00
mmap_lock.c mm: mmap_lock: fix disabling preemption directly 2021-07-23 17:43:28 -07:00
mmu_gather.c mm: move tlb_flush_pending inline helpers to mm_inline.h 2022-01-15 16:30:27 +02:00
mmu_notifier.c
…
mmzone.c mm/mmzone.c: use try_cmpxchg() in page_cpupid_xchg_last() 2022-03-22 15:57:05 -07:00
mprotect.c mm: refactor vm_area_struct::anon_vma_name usage code 2022-03-05 11:08:32 -08:00
mremap.c mm/mremap:: use vma_lookup() instead of find_vma() 2022-03-22 15:57:05 -07:00
msync.c
…
nommu.c Merge branch 'akpm' (patches from Andrew) 2021-11-06 14:08:17 -07:00
oom_kill.c Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2022-01-17 05:49:30 +02:00
page-writeback.c mm/writeback: minor clean up for highmem_dirtyable_memory 2022-03-22 15:57:01 -07:00
page_alloc.c mm/page_alloc: check high-order pages for corruption during PCP operations 2022-03-22 15:57:06 -07:00
page_counter.c mm/page_counter: remove an incorrect call to propagate_protected_usage() 2022-01-15 16:30:27 +02:00
page_ext.c mm: make some vars and functions static or __init 2022-01-15 16:30:31 +02:00
page_idle.c mm/idle_page_tracking: make PG_idle reusable 2021-09-08 11:50:24 -07:00
page_io.c delayacct: support swapin delay accounting for swapping without blkio 2022-01-20 08:52:55 +02:00
page_isolation.c Revert "mm/page_isolation: unset migratetype directly for non Buddy page" 2022-02-04 09:25:04 -08:00
page_owner.c lib/stackdepot: allow optional init and stack_table allocation by kvmalloc() 2022-01-22 08:33:37 +02:00
page_poison.c
…
page_reporting.c
…
page_reporting.h
…
page_table_check.c mm/page_table_check: check entries at pmd levels 2022-02-04 09:25:04 -08:00
page_vma_mapped.c mm: device exclusive memory access 2021-07-01 11:06:03 -07:00
pagewalk.c
…
percpu-internal.h mm: memcg/percpu: account extra objcg space to memory cgroups 2022-01-15 16:30:31 +02:00
percpu-km.c percpu: flush tlb in pcpu_reclaim_populated() 2021-07-04 18:30:17 +00:00
percpu-stats.c
…
percpu-vm.c percpu: flush tlb in pcpu_reclaim_populated() 2021-07-04 18:30:17 +00:00
percpu.c bitmap patches for 5.17-rc1 2022-01-23 06:20:44 +02:00
pgalloc-track.h
…
pgtable-generic.c mm: move tlb_flush_pending inline helpers to mm_inline.h 2022-01-15 16:30:27 +02:00
process_vm_access.c
…
ptdump.c
…
readahead.c remove inode_congested() 2022-03-22 15:57:01 -07:00
rmap.c mm/rmap: fix potential batched TLB flush race 2022-01-15 16:30:31 +02:00
rodata_test.c
…
secretmem.c mm/secretmem: avoid letting secretmem_users drop to zero 2021-10-28 17:18:55 -07:00
shmem.c mm: shmem: fix missing cache flush in shmem_mfill_atomic_pte() 2022-03-22 15:57:04 -07:00
shuffle.c
…
shuffle.h
…
slab.c mm: introduce kmem_cache_alloc_lru 2022-03-22 15:57:03 -07:00
slab.h mm: introduce kmem_cache_alloc_lru 2022-03-22 15:57:03 -07:00
slab_common.c Merge branch 'akpm' (patches from Andrew) 2022-01-15 20:37:06 +02:00
slob.c mm: introduce kmem_cache_alloc_lru 2022-03-22 15:57:03 -07:00
slub.c mm: introduce kmem_cache_alloc_lru 2022-03-22 15:57:03 -07:00
sparse-vmemmap.c mm: remove redundant smp_wmb() 2021-11-06 13:30:36 -07:00
sparse.c mm/sparse: make mminit_validate_memmodel_limits() static 2022-03-22 15:57:05 -07:00
swap.c mm/swap: fix confusing comment in folio_mark_accessed 2022-03-22 15:57:01 -07:00
swap_cgroup.c
…
swap_slots.c treewide: Add missing includes masked by cgroup -> bpf dependency 2021-12-03 10:58:13 -08:00
swap_state.c mm: swap: get rid of livelock in swapin readahead 2022-03-17 11:02:13 -07:00
swapfile.c mm: mark swap_lock and swap_active_head static 2022-01-22 08:33:38 +02:00
truncate.c mm: remove cleancache 2022-01-22 08:33:38 +02:00
usercopy.c mm: Convert check_heap_object() to use struct slab 2022-01-06 12:25:51 +01:00
userfaultfd.c mm: userfaultfd: fix missing cache flush in mcopy_atomic_pte() and __mcopy_atomic() 2022-03-22 15:57:04 -07:00
util.c mm: Consider __GFP_NOWARN flag for oversized kvmalloc() calls 2022-03-04 10:00:37 -08:00
vmacache.c
…
vmalloc.c mm/vmalloc.c: fix "unused function" warning 2022-03-22 15:57:05 -07:00
vmpressure.c mm/vmpressure: fix data-race with memcg->socket_pressure 2021-11-06 13:30:40 -07:00
vmscan.c remove bdi_congested() and wb_congested() and related functions 2022-03-22 15:57:01 -07:00
vmstat.c mm/vmstat: add events for THP max_ptes_* exceeds 2022-01-15 16:30:29 +02:00
workingset.c xarray: use kmem_cache_alloc_lru to allocate xa_node 2022-03-22 15:57:03 -07:00
z3fold.c
…
zbud.c
…
zpool.c zpool: remove the list of pools_head 2022-01-15 16:30:31 +02:00
zsmalloc.c zsmalloc: replace get_cpu_var with local_lock 2022-01-22 08:33:37 +02:00
zswap.c frontswap: remove support for multiple ops 2022-01-22 08:33:38 +02:00