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David Hildenbrand (Arm)andGreg Kroah-Hartman d77401968c mm/mempolicy: fix wrong mmap_read_unlock() in migrate_to_node() 
The backport of commit 091c1dd2d4 ("mm/mempolicy: fix migrate_to_node()
assuming there is at least one VMA in a MM") contains an error:
migrate_to_node() does not lock the mmap_lock itself, that is handled by
the caller instead.

So let's drop the wrong mmap_read_unlock(). Fortunately, this path is
very hard to hit in practice.

Fixes: a13b2b9b0b ("mm/mempolicy: fix migrate_to_node() assuming there is at least one VMA in a MM")
Reported-by: Li Ying <liying3@sungrowpower.com>
Closes: https://lore.kernel.org/r/aaZgUNxAyKC2IwuG@casper.infradead.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Gregory Price <gourry@gourry.net>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-03-25 11:06:02 +01:00
..
damon
mm/damon/sysfs-scheme: cleanup quotas subdirs on scheme dir setup failure
2026-01-30 10:27:41 +01:00
kasan
kasan: refactor pcpu kasan vmalloc unpoison
2026-01-11 15:22:17 +01:00
kfence
mm/kfence: fix KASAN hardware tag faults during late enablement
2026-03-25 11:05:57 +01:00
kmsan
mm: kmsan: fix poisoning of high-order non-compound pages
2026-01-30 10:27:42 +01:00
backing-dev.c
…
balloon_compaction.c
mm/balloon_compaction: convert balloon_page_delete() to balloon_page_finalize()
2026-01-11 15:22:28 +01:00
bootmem_info.c
…
cma_debug.c
…
cma_sysfs.c
…
cma.c
…
cma.h
…
compaction.c
NFS: fix nfs_release_folio() to not deadlock via kcompactd writeback
2025-03-13 12:58:27 +01:00
debug_page_alloc.c
…
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: clear page table entries at destroy_args()
2025-08-28 16:28:43 +02:00
debug.c
…
dmapool_test.c
…
dmapool.c
…
early_ioremap.c
…
fadvise.c
…
fail_page_alloc.c
…
failslab.c
…
filemap.c
cachestat: do not flush stats in recency check
2025-11-24 10:30:14 +01:00
folio-compat.c
…
gup_test.c
…
gup_test.h
…
gup.c
mm: folio_may_be_lru_cached() unless folio_test_large()
2025-10-02 13:42:49 +02:00
highmem.c
mm/highmem: fix __kmap_to_page() build error
2026-03-04 07:21:13 -05:00
hmm.c
mm/hmm: move pmd_to_hmm_pfn_flags() to the respective #ifdeffery
2025-08-15 12:09:08 +02:00
huge_memory.c
mm/huge_memory: fix dereferencing invalid pmd migration entry
2025-06-27 11:09:00 +01:00
hugetlb_cgroup.c
…
hugetlb_vmemmap.c
…
hugetlb_vmemmap.h
…
hugetlb.c
mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather
2026-02-19 16:28:26 +01:00
hwpoison-inject.c
…
init-mm.c
…
internal.h
Rename .data.once to .data..once to fix resetting WARN*_ONCE
2024-12-09 10:32:59 +01:00
interval_tree.c
…
io-mapping.c
…
ioremap.c
…
Kconfig
x86/kaslr: Recognize all ZONE_DEVICE users as physaddr consumers
2026-01-30 10:27:27 +01:00
Kconfig.debug
…
khugepaged.c
mm/khugepaged: fix the address passed to notifier on testing young
2025-09-19 16:32:05 +02:00
kmemleak.c
mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock
2025-08-28 16:28:32 +02:00
ksm.c
ksm: use range-walk function to jump over holes in scan_get_next_rmap_item
2026-01-17 16:29:54 +01:00
list_lru.c
…
maccess.c
…
madvise.c
mm: drop the assumption that VM_SHARED always implies writable
2025-08-28 16:28:39 +02:00
Makefile
…
mapping_dirty_helpers.c
…
memblock.c
memblock: Accept allocated memory before use in memblock_double_array()
2025-05-22 14:12:25 +02:00
memcontrol.c
memcg: fix data-race KCSAN bug in rstats
2025-11-24 10:30:14 +01:00
memfd.c
mm: reinstate ability to map write-sealed memfd mappings read-only
2025-08-28 16:28:39 +02:00
memory_hotplug.c
hwpoison, memory_hotplug: lock folio before unmap hwpoisoned folio
2025-05-22 14:12:25 +02:00
memory-failure.c
mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory
2025-09-19 16:32:04 +02:00
memory-tiers.c
memory tiers: use default_dram_perf_ref_source in log message
2025-11-24 10:30:14 +01:00
memory.c
mm/memory: do not populate page table entries beyond i_size
2025-11-24 10:30:13 +01:00
mempolicy.c
mm/mempolicy: fix wrong mmap_read_unlock() in migrate_to_node()
2026-03-25 11:06:02 +01:00
mempool.c
mm/mempool: fix poisoning order>0 pages with HIGHMEM
2025-12-01 11:41:54 +01:00
memremap.c
…
memtest.c
…
migrate_device.c
mm/migrate_device: don't add folio to be freed to LRU in migrate_device_finalize()
2025-10-02 13:42:54 +02:00
migrate.c
migrate: correct lock ordering for hugetlb file folios
2026-01-30 10:27:41 +01:00
mincore.c
…
mlock.c
mm: folio_may_be_lru_cached() unless folio_test_large()
2025-10-02 13:42:49 +02:00
mm_init.c
mm/mm_init: fix hash table order logging in alloc_large_system_hash()
2025-11-24 10:30:07 +01:00
mm_slot.h
…
mmap_lock.c
…
mmap.c
mm: reinstate ability to map write-sealed memfd mappings read-only
2025-08-28 16:28:39 +02:00
mmu_gather.c
mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather
2026-02-19 16:28:26 +01:00
mmu_notifier.c
…
mmzone.c
…
mprotect.c
mm: refactor map_deny_write_exec()
2024-11-22 15:38:37 +01:00
mremap.c
mm/mremap: correctly handle partial mremap() of VMA starting at 0
2025-04-25 10:45:31 +02:00
msync.c
…
nommu.c
mm: add nommu variant of vm_insert_pages()
2025-03-22 12:50:44 -07:00
oom_kill.c
memcg: fix soft lockup in the OOM process
2025-02-27 04:10:45 -08:00
page_alloc.c
mm, page_alloc, thp: prevent reclaim for __GFP_THISNODE THP allocations
2026-03-04 07:21:10 -05:00
page_counter.c
…
page_ext.c
…
page_idle.c
…
page_io.c
mm: memcg: add THP swap out info for anonymous reclaim
2025-11-24 10:30:12 +01:00
page_isolation.c
…
page_owner.c
…
page_poison.c
…
page_reporting.c
…
page_reporting.h
…
page_table_check.c
…
page_vma_mapped.c
mm: make page_mapped_in_vma() hugetlb walk aware
2025-04-25 10:45:31 +02:00
page-writeback.c
mm: fix arithmetic for max_prop_frac when setting max_ratio
2026-01-11 15:22:27 +01:00
pagewalk.c
…
percpu-internal.h
…
percpu-km.c
…
percpu-stats.c
…
percpu-vm.c
…
percpu.c
mm, percpu: do not consider sleepable allocations atomic
2025-11-24 10:30:10 +01:00
pgalloc-track.h
…
pgtable-generic.c
…
process_vm_access.c
…
ptdump.c
mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd()
2025-08-28 16:28:42 +02:00
readahead.c
mm/readahead: fix large folio support in async readahead
2025-01-09 13:32:08 +01:00
rmap.c
mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather
2026-02-19 16:28:26 +01:00
rodata_test.c
…
secretmem.c
mm/secretmem: fix use-after-free race in fault handler
2025-11-24 10:30:13 +01:00
shmem_quota.c
…
shmem.c
shmem: fix tmpfs reconfiguration (remount) when noswap is set
2025-12-01 11:41:39 +01:00
show_mem.c
…
shrinker_debug.c
…
shuffle.c
…
shuffle.h
…
slab_common.c
mm: krealloc: Fix MTE false alarm in __do_krealloc
2024-11-17 15:08:58 +01:00
slab.c
…
slab.h
mm/slub: Avoid list corruption when removing a slab from the full list
2024-12-09 10:33:06 +01:00
slub.c
mm: slub: avoid wake up kswapd in set_track_prepare
2025-09-09 18:56:34 +02:00
sparse-vmemmap.c
mm: introduce and use {pgd,p4d}_populate_kernel()
2025-09-19 16:32:01 +02:00
sparse.c
x86/kaslr: Expose and use the end of the physical memory address space
2024-09-12 11:11:25 +02:00
swap_cgroup.c
…
swap_slots.c
…
swap_state.c
…
swap.c
mm: folio_may_be_lru_cached() unless folio_test_large()
2025-10-02 13:42:49 +02:00
swap.h
…
swapfile.c
mm/swapfile: skip HugeTLB pages for unuse_vma
2024-10-22 15:46:21 +02:00
truncate.c
mm/truncate: unmap large folio on split failure
2025-11-24 10:30:13 +01:00
usercopy.c
…
userfaultfd.c
userfaultfd: fix checks for huge PMDs
2024-09-12 11:11:27 +02:00
util.c
mm: only enforce minimum stack gap size if it's sensible
2024-10-04 16:30:02 +02:00
vmalloc.c
kasan: refactor pcpu kasan vmalloc unpoison
2026-01-11 15:22:17 +01:00
vmpressure.c
…
vmscan.c
mm: memcg: restore subtree stats flushing
2025-11-24 10:30:13 +01:00
vmstat.c
mm: memcg: add per-memcg zswap writeback stat
2025-11-24 10:30:12 +01:00
workingset.c
cachestat: do not flush stats in recency check
2025-11-24 10:30:14 +01:00
z3fold.c
…
zbud.c
…
zpool.c
…
zsmalloc.c
minmax: make generic MIN() and MAX() macros available everywhere
2025-10-02 13:42:55 +02:00
zswap.c
mm: memcg: add per-memcg zswap writeback stat
2025-11-24 10:30:12 +01:00