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Yu ZhaoandGreg Kroah-Hartman 1971f04f12 mm/mglru: skip special VMAs in lru_gen_look_around() 
[ Upstream commit c28ac3c7eb ]

Special VMAs like VM_PFNMAP can contain anon pages from COW.  There isn't
much profit in doing lookaround on them.  Besides, they can trigger the
pte_special() warning in get_pte_pfn().

Skip them in lru_gen_look_around().

Link: https://lkml.kernel.org/r/20231223045647.1566043-1-yuzhao@google.com
Fixes: 018ee47f14 ("mm: multi-gen LRU: exploit locality in rmap")
Signed-off-by: Yu Zhao <yuzhao@google.com>
Reported-by: syzbot+03fd9b3f71641f0ebf2d@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/000000000000f9ff00060d14c256@google.com/
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[fix conflicts with variable declarations and vma pointer usage]
Signed-off-by: Jakov Novak <jakovnovak30@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2026-07-04 13:41:29 +02:00
..
damon
mm/damon/reclaim: detect and use fresh enabled and kdamond_pid values
2026-06-19 13:37:32 +02:00
kasan
mm/kasan: fix double free for kasan pXds
2026-06-01 17:38:38 +02:00
kfence
mm/kfence: disable KFENCE upon KASAN HW tags enablement
2026-03-25 11:03:15 +01:00
kmsan
mm: kmsan: fix poisoning of high-order non-compound pages
2026-02-06 16:44:19 +01:00
backing-dev.c
mm: blk-cgroup: fix use-after-free in cgwb_release_workfn()
2026-06-01 17:38:38 +02:00
balloon_compaction.c
mm/balloon_compaction: convert balloon_page_delete() to balloon_page_finalize()
2026-01-11 15:19:21 +01:00
bootmem_info.c
…
cma_debug.c
…
cma_sysfs.c
…
cma.c
mm/cma: drop incorrect alignment check in cma_init_reserved_mem
2024-06-16 13:41:39 +02:00
cma.h
…
compaction.c
mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations
2024-04-03 15:19:42 +02:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: clear page table entries at destroy_args()
2025-08-28 16:26:13 +02:00
debug.c
…
dmapool.c
…
early_ioremap.c
…
fadvise.c
…
failslab.c
…
filemap.c
filemap: cap PTE range to be created to allowed zero fill in folio_map_range()
2025-12-07 06:12:41 +09:00
folio-compat.c
…
frontswap.c
…
gup_test.c
…
gup_test.h
…
gup.c
mm/hugetlb: rename isolate_hugetlb() to folio_isolate_hugetlb()
2026-06-19 13:37:29 +02:00
highmem.c
mm/highmem: fix __kmap_to_page() build error
2026-03-04 07:20:50 -05:00
hmm.c
mm/hmm: move pmd_to_hmm_pfn_flags() to the respective #ifdeffery
2025-08-15 12:05:13 +02:00
huge_memory.c
mm/huge_memory: update file PMD counter before folio_put()
2026-06-19 13:37:18 +02:00
hugetlb_cgroup.c
mm/hugetlb_cgroup: convert hugetlb_cgroup_uncharge_page() to folios
2024-05-17 11:55:52 +02:00
hugetlb_vmemmap.c
…
hugetlb_vmemmap.h
…
hugetlb.c
mm/memory-failure: fix hugetlb_lock AA deadlock in get_huge_page_for_hwpoison
2026-06-19 13:37:30 +02:00
hwpoison-inject.c
…
init-mm.c
…
internal.h
mm: unconditionally close VMAs on error
2024-11-22 15:37:34 +01:00
interval_tree.c
…
io-mapping.c
…
ioremap.c
…
Kconfig
x86/kaslr: Recognize all ZONE_DEVICE users as physaddr consumers
2026-02-06 16:43:58 +01:00
Kconfig.debug
…
khugepaged.c
mm/khugepaged: fix the address passed to notifier on testing young
2025-09-19 16:29:57 +02:00
kmemleak.c
mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock
2025-08-28 16:26:04 +02:00
ksm.c
ksm: use range-walk function to jump over holes in scan_get_next_rmap_item
2026-01-17 16:39:32 +01:00
list_lru.c
…
maccess.c
…
madvise.c
mm: drop the assumption that VM_SHARED always implies writable
2025-08-28 16:26:12 +02:00
Makefile
…
mapping_dirty_helpers.c
…
memblock.c
x86/numa: Fix the address overlap check in numa_fill_memblks()
2024-03-01 13:26:36 +01:00
memcontrol.c
memcg: always call cond_resched() after fn()
2025-06-04 14:40:21 +02:00
memfd.c
mm: reinstate ability to map write-sealed memfd mappings read-only
2025-08-28 16:26:12 +02:00
memory_hotplug.c
mm/hugetlb: rename isolate_hugetlb() to folio_isolate_hugetlb()
2026-06-19 13:37:29 +02:00
memory-failure.c
mm/memory-failure: fix hugetlb_lock AA deadlock in get_huge_page_for_hwpoison
2026-06-19 13:37:30 +02:00
memory-tiers.c
…
memory.c
mm/memory: fix spurious warning when unmapping device-private/exclusive pages
2026-06-19 13:37:26 +02:00
mempolicy.c
mm/hugetlb: rename isolate_hugetlb() to folio_isolate_hugetlb()
2026-06-19 13:37:29 +02:00
mempool.c
mm/mempool: fix poisoning order>0 pages with HIGHMEM
2025-12-07 06:12:40 +09:00
memremap.c
…
memtest.c
memtest: use {READ,WRITE}_ONCE in memory scanning
2024-04-03 15:19:36 +02:00
migrate_device.c
mm/migrate_device: don't add folio to be freed to LRU in migrate_device_finalize()
2025-10-02 13:40:41 +02:00
migrate.c
mm/hugetlb: rename folio_putback_active_hugetlb() to folio_putback_hugetlb()
2026-06-19 13:37:29 +02:00
mincore.c
…
mlock.c
mm: folio_may_be_lru_cached() unless folio_test_large()
2025-10-02 13:40:37 +02:00
mm_init.c
…
mm_slot.h
…
mmap_lock.c
mm: mmap_lock: replace get_memcg_path_buf() with on-stack buffer
2024-08-03 08:49:30 +02:00
mmap.c
mm: reinstate ability to map write-sealed memfd mappings read-only
2025-08-28 16:26:12 +02:00
mmu_gather.c
mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather
2026-03-25 11:03:14 +01:00
mmu_notifier.c
…
mmzone.c
…
mprotect.c
Revert "mm/mprotect: delete pmd_none_or_clear_bad_unless_trans_huge()"
2026-02-06 16:44:22 +01:00
mremap.c
x86/mm/pat: clear VM_PAT if copy_p4d_range failed
2026-01-11 15:19:24 +01:00
msync.c
…
nommu.c
mm: add nommu variant of vm_insert_pages()
2025-03-28 21:58:53 +01:00
oom_kill.c
memcg: fix soft lockup in the OOM process
2025-03-07 16:56:29 +01:00
page_alloc.c
mm/page_alloc: clear page->private in free_pages_prepare()
2026-06-19 13:36:56 +02:00
page_counter.c
…
page_ext.c
…
page_idle.c
…
page_io.c
…
page_isolation.c
…
page_owner.c
…
page_poison.c
…
page_reporting.c
…
page_reporting.h
…
page_table_check.c
mm/page_table_check: fix crash on ZONE_DEVICE
2024-06-27 13:46:22 +02:00
page_vma_mapped.c
…
page-writeback.c
mm: fix ratelimit_pages update error in dirty_ratio_handler()
2025-06-27 11:07:30 +01:00
pagewalk.c
mm/pagewalk: add walk_page_range_vma()
2026-01-17 16:39:32 +01:00
percpu-internal.h
…
percpu-km.c
…
percpu-stats.c
…
percpu-vm.c
…
percpu.c
mm, percpu: do not consider sleepable allocations atomic
2025-12-07 06:12:36 +09:00
pgalloc-track.h
…
pgtable-generic.c
mm: fix race between __split_huge_pmd_locked() and GUP-fast
2024-06-16 13:41:38 +02:00
process_vm_access.c
…
ptdump.c
mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd()
2025-08-28 16:26:11 +02:00
readahead.c
mm/readahead: fix large folio support in async readahead
2025-01-09 13:30:06 +01:00
rmap.c
mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather
2026-03-25 11:03:14 +01:00
rodata_test.c
…
secretmem.c
mm/secretmem: fix use-after-free race in fault handler
2025-12-07 06:12:39 +09:00
shmem.c
mm: update memfd seal write check to include F_SEAL_WRITE
2025-08-28 16:26:12 +02:00
shrinker_debug.c
…
shuffle.c
…
shuffle.h
…
slab_common.c
mm: krealloc: Fix MTE false alarm in __do_krealloc
2024-11-17 15:07:22 +01:00
slab.c
…
slab.h
…
slob.c
…
slub.c
mm: slub: avoid wake up kswapd in set_track_prepare
2025-09-09 18:54:24 +02:00
sparse-vmemmap.c
mm: introduce and use {pgd,p4d}_populate_kernel()
2025-09-19 16:29:55 +02:00
sparse.c
x86/kaslr: Expose and use the end of the physical memory address space
2024-09-12 11:10:17 +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 13:40:37 +02:00
swap.h
…
swapfile.c
mm/swapfile: skip HugeTLB pages for unuse_vma
2024-10-22 15:56:43 +02:00
truncate.c
mm/truncate: unmap large folio on split failure
2025-12-07 06:12:40 +09:00
usercopy.c
…
userfaultfd.c
…
util.c
mm: unconditionally close VMAs on error
2024-11-22 15:37:34 +01:00
vmalloc.c
kasan: refactor pcpu kasan vmalloc unpoison
2026-01-11 15:19:11 +01:00
vmpressure.c
…
vmscan.c
mm/mglru: skip special VMAs in lru_gen_look_around()
2026-07-04 13:41:29 +02:00
vmstat.c
vmstat: call fold_vm_zone_numa_events() before show per zone NUMA event
2024-12-14 19:54:13 +01:00
workingset.c
…
z3fold.c
…
zbud.c
…
zpool.c
…
zsmalloc.c
minmax: make generic MIN() and MAX() macros available everywhere
2025-10-02 13:40:43 +02:00
zswap.c
mm: zswap: fix missing folio cleanup in writeback race path
2024-03-01 13:26:39 +01:00