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Miaohe Lin 4cd614841c mm/migration: fix possible do_pages_stat_array racing with memory offline 
When follow_page peeks a page, the page could be migrated and then be
offlined while it's still being used by the do_pages_stat_array().  Use
FOLL_GET to hold the page refcnt to fix this potential race.

Link: https://lkml.kernel.org/r/20220318111709.60311-12-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: "Huang, Ying" <ying.huang@intel.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-04-28 23:16:08 -07:00
..
damon
mm/damon: prevent activated scheme from sleeping by deactivated schemes
2022-04-01 11:46:09 -07:00
kasan
kasan: prevent cpu_quarantine corruption when CPU offline and cache shrink occur at same time
2022-04-27 13:28:48 -07:00
kfence
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-15 14:49:55 -07:00
backing-dev.c
remove congestion tracking framework
2022-03-22 15:57:01 -07:00
balloon_compaction.c
mm/balloon_compaction: make balloon page compaction callbacks static
2022-03-28 16:52:57 -04:00
bootmem_info.c
bootmem: Use page->index instead of page->freelist
2022-01-06 12:27:03 +01:00
cma_debug.c
mm/cma: change cma mutex to irq safe spinlock
2021-05-05 11:27:21 -07:00
cma_sysfs.c
mm: cma: support sysfs
2021-05-05 11:27:24 -07:00
cma.c
mm/cma: provide option to opt out from exposing pages on activation failure
2022-03-22 15:57:09 -07:00
cma.h
mm/cma: provide option to opt out from exposing pages on activation failure
2022-03-22 15:57:09 -07:00
compaction.c
mm: compaction: use helper isolation_suitable()
2022-04-28 23:16:06 -07:00
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
debug.c
mm: unexport page_init_poison
2022-03-24 19:06:45 -07:00
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: declare early_memremap_pgprot_adjust()
2022-03-22 15:57:11 -07:00
fadvise.c
remove inode_congested()
2022-03-22 15:57:01 -07:00
failslab.c
…
filemap.c
tmpfs: fix regressions from wider use of ZERO_PAGE
2022-04-15 14:49:54 -07:00
folio-compat.c
mm/rmap: Convert rmap_walk() to take a folio
2022-03-21 13:01:35 -04:00
frontswap.c
frontswap: remove support for multiple ops
2022-01-22 08:33:38 +02:00
gup_test.c
selftests/vm: gup_test: test faulting in kernel, and verify pinnable pages
2021-05-05 11:27:26 -07:00
gup_test.h
selftests/vm: gup_test: fix test flag
2021-05-05 11:27:26 -07:00
gup.c
mm/munlock: add lru_add_drain() to fix memcg_stat_test
2022-04-01 11:46:09 -07:00
highmem.c
highmem: fix checks in __kmap_local_sched_{in,out}
2022-04-08 14:20:36 -10:00
hmm.c
mm/hmm.c: remove unneeded local variable ret
2022-03-22 15:57:12 -07:00
huge_memory.c
mm/huge_memory: Avoid calling pmd_page() on a non-leaf PMD
2022-04-07 09:43:41 -04:00
hugetlb_cgroup.c
hugetlb: add hugetlb.*.numa_stat file
2022-01-15 16:30:29 +02:00
hugetlb_vmemmap.c
mm: hugetlb: replace hugetlb_free_vmemmap_enabled with a static_key
2022-03-22 15:57:08 -07:00
hugetlb_vmemmap.h
mm: hugetlb: introduce nr_free_vmemmap_pages in the struct hstate
2021-06-30 20:47:25 -07:00
hugetlb.c
hugetlb: remove use of list iterator variable after loop
2022-04-28 23:16:03 -07:00
hwpoison-inject.c
mm/hwpoison: avoid the impact of hwpoison_filter() return value on mce handler
2022-03-22 15:57:07 -07:00
init-mm.c
kernel/fork: Initialize mm's PASID
2022-02-14 19:51:47 +01:00
internal.h
mm: wrap __find_buddy_pfn() with a necessary buddy page validation
2022-04-28 23:16:01 -07:00
interval_tree.c
mm/interval_tree: add comments to improve code readability
2021-04-30 11:20:38 -07:00
io-mapping.c
mm: add a io_mapping_map_user helper
2021-04-30 11:20:39 -07:00
ioremap.c
mm: move ioremap_page_range to vmalloc.c
2021-09-08 11:50:24 -07:00
Kconfig
mm: generalize ARCH_HAS_FILTER_PGPROT
2022-03-24 19:06:51 -07:00
Kconfig.debug
mm: page table check
2022-01-15 16:30:28 +02:00
khugepaged.c
mm/khugepaged: remove reuse_swap_page() usage
2022-03-24 19:06:51 -07:00
kmemleak.c
mm: kmemleak: take a full lowmem check in kmemleak_*_phys()
2022-04-15 14:49:56 -07:00
ksm.c
Folio changes for 5.18
2022-03-22 17:03:12 -07:00
list_lru.c
mm/list_lru.c: revert "mm/list_lru: optimize memcg_reparent_list_lru_node()"
2022-04-08 14:20:36 -10:00
maccess.c
asm-generic updates for 5.18
2022-03-23 18:03:08 -07:00
madvise.c
Revert "mm: madvise: skip unmapped vma holes passed to process_madvise"
2022-04-01 11:46:09 -07:00
Makefile
mm: move the migrate_vma_* device migration code into its own file
2022-03-03 12:47:33 -05:00
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: test suite and a small cleanup
2022-03-27 13:36:06 -07:00
memcontrol.c
mm/memcontrol.c: remove unused private flag of memory.oom_control
2022-04-28 23:16:00 -07:00
memfd.c
memfd: fix F_SEAL_WRITE after shmem huge page allocated
2022-03-05 11:08:32 -08:00
memory_hotplug.c
Folio changes for 5.18
2022-03-22 17:03:12 -07:00
memory-failure.c
mm, hugetlb, hwpoison: separate branch for free and in-use hugepage
2022-04-28 23:16:02 -07:00
memory.c
mm,hwpoison: unmap poisoned page before invalidation
2022-04-01 11:46:09 -07:00
mempolicy.c
mm/mempolicy: clean up the code logic in queue_pages_pte_range
2022-04-28 23:16:06 -07:00
mempool.c
mm: remove spurious blkdev.h includes
2021-10-18 06:17:01 -06:00
memremap.c
mm: delete __ClearPageWaiters()
2022-03-24 19:06:45 -07:00
memtest.c
…
migrate_device.c
mm/migrate: Convert remove_migration_ptes() to folios
2022-03-21 13:01:35 -04:00
migrate.c
mm/migration: fix possible do_pages_stat_array racing with memory offline
2022-04-28 23:16:08 -07:00
mincore.c
inode: make init and permission helpers idmapped mount aware
2021-01-24 14:27:16 +01:00
mlock.c
mm/munlock: protect the per-CPU pagevec by a local_lock_t
2022-04-01 11:46:09 -07:00
mm_init.c
include/linux/page-flags-layout.h: cleanups
2021-04-30 11:20:42 -07:00
mmap_lock.c
mm: mmap_lock: fix disabling preemption directly
2021-07-23 17:43:28 -07:00
mmap.c
mm, hugetlb: allow for "high" userspace addresses
2022-04-21 20:01:09 -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
mm/mmu_notifier.c: fix race in mmu_interval_notifier_remove()
2022-04-21 20:01:10 -07:00
mmzone.c
Folio changes for 5.18
2022-03-22 17:03:12 -07:00
mprotect.c
memory tiering: skip to scan fast memory
2022-03-22 15:57:09 -07:00
mremap.c
mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0)
2022-04-08 14:20:36 -10:00
msync.c
mm/msync: exit early when the flags is an MS_ASYNC and start < vm_start
2021-04-30 11:20:37 -07:00
nommu.c
no-MMU: expose vmalloc_huge() for alloc_large_system_hash()
2022-04-25 10:11:49 -07:00
oom_kill.c
oom_kill.c: futex: delay the OOM reaper to allow time for proper futex cleanup
2022-04-21 20:01:10 -07:00
page_alloc.c
mm/vmscan: make sure wakeup_kswapd with managed zone
2022-04-28 23:16:03 -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/rmap: Constify the rmap_walk_control argument
2022-03-21 13:01:35 -04:00
page_io.c
mm: fix unexpected zeroed page mapping with zram swap
2022-04-15 14:49:55 -07:00
page_isolation.c
mm: wrap __find_buddy_pfn() with a necessary buddy page validation
2022-04-28 23:16:01 -07:00
page_owner.c
mm/page_owner.c: record tgid
2022-03-24 19:06:44 -07:00
page_poison.c
mm: page_poison: print page info when corruption is caught
2021-04-30 11:20:36 -07:00
page_reporting.c
mm/page_reporting: allow driver to specify reporting order
2021-06-29 10:53:47 -07:00
page_reporting.h
mm/page_reporting: export reporting order as module parameter
2021-06-29 10:53:47 -07:00
page_table_check.c
mm/page_table_check.c: use strtobool for param parsing
2022-03-22 15:57:11 -07:00
page_vma_mapped.c
mm/rmap: Fix handling of hugetlbfs pages in page_vma_mapped_walk
2022-04-07 10:11:20 -04:00
page-writeback.c
mm: rework calculation of bdi_min_ratio in bdi_set_min_ratio
2022-04-28 23:15:57 -07:00
pagewalk.c
mm: pagewalk: fix walk for hugepage tables
2021-06-29 10:53:49 -07:00
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
mm: use vmalloc_array and vcalloc for array allocations
2022-03-08 09:30:46 -05:00
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
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
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
mm/process_vm_access.c: remove duplicate include
2021-05-05 11:27:27 -07:00
ptdump.c
mm: sparsemem: use page table lock to protect kernel pmd operations
2022-03-22 15:57:08 -07:00
readahead.c
readahead: Update comments
2022-04-01 14:40:42 -04:00
rmap.c
mm/munlock: protect the per-CPU pagevec by a local_lock_t
2022-04-01 11:46:09 -07:00
rodata_test.c
…
secretmem.c
mm/secretmem: fix panic when growing a memfd_secret
2022-04-15 14:49:54 -07:00
shmem.c
mm: shmem: make shmem_init return void
2022-04-28 23:15:58 -07:00
shuffle.c
mm: eliminate "expecting prototype" kernel-doc warnings
2021-04-16 16:10:36 -07:00
shuffle.h
mm/shuffle: fix section mismatch warning
2021-05-22 15:09:07 -10:00
slab_common.c
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-15 14:49:55 -07:00
slab.c
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-15 14:49:55 -07:00
slab.h
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-15 14:49:55 -07:00
slob.c
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-15 14:49:55 -07:00
slub.c
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-15 14:49:55 -07:00
sparse-vmemmap.c
mm: sparsemem: move vmemmap related to HugeTLB to CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
2022-03-22 15:57:08 -07:00
sparse.c
mm/sparse: make mminit_validate_memmodel_limits() static
2022-03-22 15:57:05 -07:00
swap_cgroup.c
mm: use vmalloc_array and vcalloc for array allocations
2022-03-08 09:30:46 -05:00
swap_slots.c
treewide: Add missing includes masked by cgroup -> bpf dependency
2021-12-03 10:58:13 -08:00
swap_state.c
Filesystem folio changes for 5.18
2022-03-22 18:26:56 -07:00
swap.c
mm/munlock: protect the per-CPU pagevec by a local_lock_t
2022-04-01 11:46:09 -07:00
swapfile.c
mm/swapfile: remove stale reuse_swap_page()
2022-03-24 19:06:51 -07:00
truncate.c
Filesystem folio changes for 5.18
2022-03-22 18:26:56 -07:00
usercopy.c
Merge branch 'akpm' (patches from Andrew)
2022-03-22 16:11:53 -07:00
userfaultfd.c
userfaultfd: mark uffd_wp regardless of VM_WRITE flag
2022-04-21 20:01:09 -07:00
util.c
kvmalloc: use vmalloc_huge for vmalloc allocations
2022-04-24 10:05:38 -07:00
vmacache.c
…
vmalloc.c
vmap(): don't allow invalid pages
2022-04-28 23:16:00 -07:00
vmpressure.c
mm/vmpressure: fix data-race with memcg->socket_pressure
2021-11-06 13:30:40 -07:00
vmscan.c
mm/vmscan: fix comment for isolate_lru_pages
2022-04-28 23:16:04 -07:00
vmstat.c
mm: only re-generate demotion targets when a numa node changes its N_CPU state
2022-03-22 15:57:11 -07:00
workingset.c
memcg: sync flush only if periodic flush is delayed
2022-04-21 20:01:09 -07:00
z3fold.c
mm/z3fold: remove unneeded PAGE_HEADLESS check in free_handle()
2022-04-28 23:16:06 -07:00
zbud.c
mm/zbud: add kerneldoc fields for zbud_pool
2021-07-01 11:06:03 -07:00
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
mm/zswap.c: allow handling just same-value filled pages
2022-03-22 15:57:11 -07:00