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linux/mm
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Maciej Wieczor-Retman c9acbaec69 kasan: refactor pcpu kasan vmalloc unpoison 
commit 6f13db031e27e88213381039032a9cc061578ea6 upstream.

A KASAN tag mismatch, possibly causing a kernel panic, can be observed
on systems with a tag-based KASAN enabled and with multiple NUMA nodes.
It was reported on arm64 and reproduced on x86. It can be explained in
the following points:

1. There can be more than one virtual memory chunk.
2. Chunk's base address has a tag.
3. The base address points at the first chunk and thus inherits
   the tag of the first chunk.
4. The subsequent chunks will be accessed with the tag from the
   first chunk.
5. Thus, the subsequent chunks need to have their tag set to
   match that of the first chunk.

Refactor code by reusing __kasan_unpoison_vmalloc in a new helper in
preparation for the actual fix.

Link: https://lkml.kernel.org/r/eb61d93b907e262eefcaa130261a08bcb6c5ce51.1764874575.git.m.wieczorretman@pm.me
Fixes: 1d96320f8d ("kasan, vmalloc: add vmalloc tagging for SW_TAGS")
Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Jiayuan Chen <jiayuan.chen@linux.dev>
Cc: Kees Cook <kees@kernel.org>
Cc: Marco Elver <elver@google.com>
Cc: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: <stable@vger.kernel.org>	[6.1+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-01-11 15:22:17 +01:00
..
damon
mm/damon/vaddr: do not repeat pte_offset_map_lock() until success
2025-10-19 16:30:55 +02:00
kasan
kasan: refactor pcpu kasan vmalloc unpoison
2026-01-11 15:22:17 +01:00
kfence
kfence: skip __GFP_THISNODE allocations on NUMA systems
2025-02-17 09:40:32 +01:00
kmsan
kmsan: fix out-of-bounds access to shadow memory
2025-10-02 13:42:53 +02:00
backing-dev.c
blk-wbt: Fix detection of dirty-throttled tasks
2024-02-23 09:25:16 +01:00
balloon_compaction.c
mm: Convert all PageMovable users to movable_operations
2022-08-02 12:34:03 -04:00
bootmem_info.c
bootmem: remove the vmemmap pages from kmemleak in put_page_bootmem
2022-08-28 14:02:45 -07:00
cma_debug.c
mm/cma_debug: show complete cma name in debugfs directories
2022-09-11 20:25:50 -07:00
cma_sysfs.c
mm: cma: make kobj_type structure constant
2023-03-28 16:20:06 -07:00
cma.c
mm/cma: drop incorrect alignment check in cma_init_reserved_mem
2024-06-16 13:47:42 +02:00
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
NFS: fix nfs_release_folio() to not deadlock via kcompactd writeback
2025-03-13 12:58:27 +01:00
debug_page_alloc.c
mm: page_alloc: split out DEBUG_PAGEALLOC
2023-06-09 16:25:23 -07:00
debug_page_ref.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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
mm: update validate_mm() to use vma iterator
2023-06-09 16:25:31 -07:00
dmapool_test.c
dmapool: add alloc/free performance test
2023-04-05 19:42:38 -07:00
dmapool.c
dmapool: create/destroy cleanup
2023-06-09 16:25:17 -07:00
early_ioremap.c
mm/early_ioremap.c: improve the execution efficiency of early_ioremap_setup()
2023-06-09 16:25:56 -07:00
fadvise.c
mm: remove unnecessary pagevec includes
2023-06-23 16:59:31 -07:00
fail_page_alloc.c
mm: page_alloc: split out FAIL_PAGE_ALLOC
2023-06-09 16:25:23 -07:00
failslab.c
mm: fix unexpected changes to {failslab|fail_page_alloc}.attr
2022-11-22 18:50:44 -08:00
filemap.c
cachestat: do not flush stats in recency check
2025-11-24 10:30:14 +01:00
folio-compat.c
filemap: Add fgf_t typedef
2023-07-24 18:04:30 -04:00
gup_test.c
Merge mm-hotfixes-stable into mm-stable to pick up depended-upon changes.
2023-06-23 16:58:19 -07:00
gup_test.h
mm/gup_test: start/stop/read functionality for PIN LONGTERM test
2022-11-08 17:37:15 -08:00
gup.c
mm: folio_may_be_lru_cached() unless folio_test_large()
2025-10-02 13:42:49 +02:00
highmem.c
mm: ptep_get() conversion
2023-06-19 16:19:25 -07:00
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
mm/hugetlb: increase use of folios in alloc_huge_page()
2023-02-13 15:54:27 -08:00
hugetlb_vmemmap.c
mm: hugetlb_vmemmap: fix a race between vmemmap pmd split
2023-08-18 10:12:14 -07:00
hugetlb_vmemmap.h
mm: hugetlb_vmemmap: improve hugetlb_vmemmap code readability
2022-08-08 18:06:43 -07:00
hugetlb.c
mm/hugetlb: early exit from hugetlb_pages_alloc_boot() when max_huge_pages=0
2025-10-19 16:30:55 +02:00
hwpoison-inject.c
mm/hwpoison: add __init/__exit annotations to module init/exit funcs
2022-10-03 14:03:05 -07:00
init-mm.c
mm: move dummy_vm_ops out of a header
2023-08-21 13:37:46 -07:00
internal.h
Rename .data.once to .data..once to fix resetting WARN*_ONCE
2024-12-09 10:32:59 +01:00
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: ioremap: remove unneeded ioremap_allowed and iounmap_allowed
2023-08-18 10:12:36 -07:00
Kconfig
Disable SLUB_TINY for build testing
2025-09-19 16:32:05 +02:00
Kconfig.debug
mm: page_table_check: Make it dependent on EXCLUSIVE_SYSTEM_RAM
2023-05-29 16:14:28 +01:00
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
mm/ksm: fix ksm_zero_pages accounting
2024-06-16 13:47:41 +02:00
list_lru.c
mm: kmem: make mem_cgroup_from_obj() vmalloc()-safe
2022-06-16 19:48:31 -07:00
maccess.c
mm: Fix copy_from_user_nofault().
2023-04-12 17:36:23 -07:00
madvise.c
mm: drop the assumption that VM_SHARED always implies writable
2025-08-28 16:28:39 +02:00
Makefile
Merge tag 'mm-stable-2023-08-28-18-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-08-29 14:25:26 -07:00
mapping_dirty_helpers.c
mm: fix clean_record_shared_mapping_range kernel-doc
2023-08-24 16:20:30 -07:00
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 migrate_to_node() assuming there is at least one VMA in a MM
2024-12-14 20:00:18 +01:00
mempool.c
mm/mempool: fix poisoning order>0 pages with HIGHMEM
2025-12-01 11:41:54 +01:00
memremap.c
mm/memremap.c: fix outdated comment in devm_memremap_pages
2023-02-09 16:51:46 -08:00
memtest.c
memtest: use {READ,WRITE}_ONCE in memory scanning
2024-04-03 15:28:33 +02:00
migrate_device.c
mm/migrate_device: don't add folio to be freed to LRU in migrate_device_finalize()
2025-10-02 13:42:54 +02:00
migrate.c
mm/migrate: correct nr_failed in migrate_pages_sync()
2025-05-22 14:12:25 +02:00
mincore.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
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
mm: introduce common struct mm_slot
2022-10-03 14:02:43 -07:00
mmap_lock.c
mm: mmap_lock: replace get_memcg_path_buf() with on-stack buffer
2024-08-03 08:54:12 +02:00
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: fix kernel-doc warning from tlb_flush_rmaps()
2023-08-24 16:20:30 -07:00
mmu_notifier.c
mmu_notifiers: rename invalidate_range notifier
2023-08-18 10:12:41 -07:00
mmzone.c
mm: multi-gen LRU: groundwork
2022-09-26 19:46:09 -07:00
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
mm/msync: use vma_find() instead of vma linked list
2022-09-26 19:46:25 -07:00
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: only set ALLOC_HIGHATOMIC for __GPF_HIGH allocations
2025-10-19 16:30:55 +02:00
page_counter.c
mm: page_counter: remove unneeded atomic ops for low/min
2022-09-11 20:26:01 -07:00
page_ext.c
mm/page_ext: move functions around for minor cleanups to page_ext
2023-08-18 10:12:31 -07:00
page_idle.c
mm: page_idle: convert page idle to use a folio
2023-01-18 17:12:52 -08:00
page_io.c
mm: memcg: add THP swap out info for anonymous reclaim
2025-11-24 10:30:12 +01:00
page_isolation.c
mm/hugetlb: get rid of page_hstate()
2023-08-18 10:12:39 -07:00
page_owner.c
mm/page_ext: use page_ext_data helper in page_owner
2023-08-21 13:37:27 -07:00
page_poison.c
mm/page_poison: remove unused page_ext.h from page_poison
2023-08-21 13:37:30 -07:00
page_reporting.c
mm, treewide: introduce NR_PAGE_ORDERS
2024-05-02 16:32:41 +02:00
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: support userfault wr-protect entries
2024-08-19 06:04:29 +02:00
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 ratelimit_pages update error in dirty_ratio_handler()
2025-06-27 11:08:49 +01:00
pagewalk.c
mm/pagewalk: fix bootstopping regression from extra pte_unmap()
2023-09-02 08:39:21 -07:00
percpu-internal.h
percpu-internal/pcpu_chunk: re-layout pcpu_chunk structure to reduce false sharing
2023-06-19 16:19:29 -07:00
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
mm, percpu: do not consider sleepable allocations atomic
2025-11-24 10:30:10 +01:00
pgalloc-track.h
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
pgtable-generic.c
mm: fix race between __split_huge_pmd_locked() and GUP-fast
2024-06-16 13:47:40 +02:00
process_vm_access.c
mm/gup: remove unused vmas parameter from pin_user_pages_remote()
2023-06-09 16:25:25 -07:00
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/rmap: reject hugetlb folios in folio_make_device_exclusive()
2025-04-25 10:45:31 +02:00
rodata_test.c
mm/rodata_test: use PAGE_ALIGNED() helper
2022-10-03 14:03:05 -07:00
secretmem.c
mm/secretmem: fix use-after-free race in fault handler
2025-11-24 10:30:13 +01:00
shmem_quota.c
tmpfs: fix race on handling dquot rbtree
2024-04-03 15:28:54 +02:00
shmem.c
shmem: fix tmpfs reconfiguration (remount) when noswap is set
2025-12-01 11:41:39 +01:00
show_mem.c
mm, treewide: introduce NR_PAGE_ORDERS
2024-05-02 16:32:41 +02:00
shrinker_debug.c
Revert "mm: shrinkers: make count and scan in shrinker debugfs lockless"
2023-06-19 13:19:34 -07:00
shuffle.c
mm/shuffle: convert module_param_call to module_param_cb
2022-10-03 14:03:07 -07:00
shuffle.h
mm, treewide: redefine MAX_ORDER sanely
2023-04-05 19:42:46 -07:00
slab_common.c
mm: krealloc: Fix MTE false alarm in __do_krealloc
2024-11-17 15:08:58 +01:00
slab.c
Randomized slab caches for kmalloc()
2023-07-18 10:07:47 +02:00
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
mm: memcontrol: don't allocate cgroup swap arrays when memcg is disabled
2022-10-03 14:03:36 -07:00
swap_slots.c
mm/swap: convert put_swap_page() to put_swap_folio()
2022-10-03 14:02:46 -07:00
swap_state.c
mm/swap: inline folio_set_swap_entry() and folio_swap_entry()
2023-08-24 16:20:28 -07:00
swap.c
mm: folio_may_be_lru_cached() unless folio_test_large()
2025-10-02 13:42:49 +02:00
swap.h
mm/swap: fix race when skipping swapcache
2024-03-01 13:35:00 +01:00
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
mm: Fix copy_from_user_nofault().
2023-04-12 17:36:23 -07:00
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
net-memcg: Fix scope of sockmem pressure indicators
2023-08-16 12:21:32 +01:00
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
mm/z3fold: remove obsolete comment for struct z3fold_pool
2023-08-21 13:37:51 -07:00
zbud.c
mm: zswap: remove shrink from zpool interface
2023-06-19 16:19:27 -07:00
zpool.c
mm: zswap: remove shrink from zpool interface
2023-06-19 16:19:27 -07:00
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