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Hugh Dickins e5548f85b4 shmem: fix smaps BUG sleeping while atomic 
smaps_pte_hole_lookup() is calling shmem_partial_swap_usage() with page
table lock held: but shmem_partial_swap_usage() does cond_resched_rcu() if
need_resched(): "BUG: sleeping function called from invalid context".

Since shmem_partial_swap_usage() is designed to count across a range, but
smaps_pte_hole_lookup() only calls it for a single page slot, just break
out of the loop on the last or only page, before checking need_resched().

Link: https://lkml.kernel.org/r/6fe3b3ec-abdf-332f-5c23-6a3b3a3b11a9@google.com
Fixes: 230100321518 ("mm/smaps: simplify shmem handling of pte holes")
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Peter Xu <peterx@redhat.com>
Cc: <stable@vger.kernel.org>	[5.16+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-08-24 14:59:47 -07:00
..
damon
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
kasan
kasan, slub: fix HW_TAGS zeroing with slub_debug
2023-07-08 09:29:32 -07:00
kfence
mm/slab: introduce kmem_cache flag SLAB_NO_MERGE
2023-06-02 10:24:33 +02:00
kmsan
kasan,kmsan: remove __GFP_KSWAPD_RECLAIM usage from kasan/kmsan
2023-06-23 16:59:26 -07:00
backing-dev.c
mm: backing-dev: make bdi_class a static const structure
2023-06-23 16:59:27 -07:00
balloon_compaction.c
…
bootmem_info.c
…
cma_debug.c
…
cma_sysfs.c
mm: cma: make kobj_type structure constant
2023-03-28 16:20:06 -07:00
cma.c
mm/page_owner/cma: show pfn in cma/page_owner with hex format
2023-06-19 16:19:32 -07:00
cma.h
…
compaction.c
mm: compaction: fix endless looping over same migrate block
2023-08-04 13:03:42 -07:00
debug_page_alloc.c
mm: page_alloc: split out DEBUG_PAGEALLOC
2023-06-09 16:25:23 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable,page_table_check: warn pte map fails
2023-06-19 16:19:15 -07:00
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
- Yosry Ahmed brought back some cgroup v1 stats in OOM logs.
2023-06-28 10:28:11 -07:00
folio-compat.c
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
frontswap.c
mm: zswap: support exclusive loads
2023-06-19 16:19:05 -07:00
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/gup: reintroduce FOLL_NUMA as FOLL_HONOR_NUMA_FAULT
2023-08-21 13:07:20 -07:00
highmem.c
mm: ptep_get() conversion
2023-06-19 16:19:25 -07:00
hmm.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
huge_memory.c
madvise:madvise_free_huge_pmd(): don't use mapcount() against large folio for sharing check
2023-08-24 14:59:46 -07:00
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: ptep_get() conversion
2023-06-19 16:19:25 -07:00
hugetlb_vmemmap.h
…
hugetlb.c
hugetlb: do not clear hugetlb dtor until allocating vmemmap
2023-08-04 13:03:41 -07:00
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
IOMMU Updates for Linux 6.4
2023-04-30 13:00:38 -07:00
internal.h
mm/gup: handle cont-PTE hugetlb pages correctly in gup_must_unshare() via GUP-fast
2023-08-21 13:07:21 -07:00
interval_tree.c
…
io-mapping.c
…
ioremap.c
…
Kconfig
mm: disable CONFIG_PER_VMA_LOCK until its fixed
2023-07-08 09:29:29 -07:00
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 regression in collapse_file()
2023-06-29 09:41:45 -07:00
kmemleak.c
lib/stackdepot, mm: rename stack_depot_want_early_init
2023-02-16 20:43:49 -08:00
ksm.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
list_lru.c
…
maccess.c
mm: Fix copy_from_user_nofault().
2023-04-12 17:36:23 -07:00
madvise.c
madvise:madvise_free_pte_range(): don't use mapcount() against large folio for sharing check
2023-08-24 14:59:46 -07:00
Makefile
mm: page_alloc: split out DEBUG_PAGEALLOC
2023-06-09 16:25:23 -07:00
mapping_dirty_helpers.c
mm: ptep_get() conversion
2023-06-19 16:19:25 -07:00
memblock.c
Revert "mm,memblock: reset memblock.reserved to system init state to prevent UAF"
2023-07-28 09:47:06 -07:00
memcontrol.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
memfd.c
memfd: check for non-NULL file_seals in memfd_create() syscall
2023-06-19 13:19:31 -07:00
memory_hotplug.c
mm: remove unnecessary pagevec includes
2023-06-23 16:59:31 -07:00
memory-failure.c
mm: memory-failure: fix unexpected return value in soft_offline_page()
2023-08-21 13:07:22 -07:00
memory-tiers.c
memory tier: remove unneeded !IS_ENABLED(CONFIG_MIGRATION) check
2023-06-19 16:19:29 -07:00
memory.c
mm: lock_vma_under_rcu() must check vma->anon_vma under vma lock
2023-07-27 11:13:22 -07:00
mempolicy.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
mempool.c
mempool: do not use ksize() for poisoning
2022-11-30 15:58:41 -08:00
memremap.c
mm/memremap.c: fix outdated comment in devm_memremap_pages
2023-02-09 16:51:46 -08:00
memtest.c
mm/memtest: add results of early memtest to /proc/meminfo
2023-04-05 19:42:55 -07:00
migrate_device.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
migrate.c
mm: remove unnecessary pagevec includes
2023-06-23 16:59:31 -07:00
mincore.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
mlock.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
mm_init.c
- Yosry Ahmed brought back some cgroup v1 stats in OOM logs.
2023-06-28 10:28:11 -07:00
mm_slot.h
…
mmap_lock.c
…
mmap.c
mm: lock VMA in dup_anon_vma() before setting ->anon_vma
2023-07-27 13:07:04 -07:00
mmu_gather.c
mm: prefer xxx_page() alloc/free functions for order-0 pages
2023-03-28 16:20:16 -07:00
mmu_notifier.c
mm/mmu_notifier: remove unused mmu_notifier_range_update_to_read_only export
2023-02-02 22:32:54 -08:00
mmzone.c
…
mprotect.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -07:00
mremap.c
mm: Update do_vmi_align_munmap() return semantics
2023-07-01 08:10:56 -07:00
msync.c
…
nommu.c
xtensa: fix lock_mm_and_find_vma in case VMA not found
2023-07-01 08:00:05 -07:00
oom_kill.c
mm, oom: do not check 0 mask in out_of_memory()
2023-06-09 16:25:20 -07:00
page_alloc.c
- Yosry Ahmed brought back some cgroup v1 stats in OOM logs.
2023-06-28 10:28:11 -07:00
page_counter.c
…
page_ext.c
mm/page_ext: init page_ext early if there are no deferred struct pages
2023-02-02 22:33:22 -08:00
page_idle.c
mm: page_idle: convert page idle to use a folio
2023-01-18 17:12:52 -08:00
page_io.c
swap: use __bio_add_page to add page to bio
2023-05-31 09:50:02 -06:00
page_isolation.c
mm: page_isolation: write proper kerneldoc
2023-06-19 16:18:59 -07:00
page_owner.c
mm/page_owner/cma: show pfn in cma/page_owner with hex format
2023-06-19 16:19:32 -07:00
page_poison.c
…
page_reporting.c
mm, treewide: redefine MAX_ORDER sanely
2023-04-05 19:42:46 -07:00
page_reporting.h
…
page_table_check.c
- Yosry Ahmed brought back some cgroup v1 stats in OOM logs.
2023-06-28 10:28:11 -07:00
page_vma_mapped.c
mm: ptep_get() conversion
2023-06-19 16:19:25 -07:00
page-writeback.c
writeback: account the number of pages written back
2023-07-08 09:29:30 -07:00
pagewalk.c
mm: enable page walking API to lock vmas during the walk
2023-08-21 13:07:20 -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-stats.c
…
percpu-vm.c
…
percpu.c
mm: memcontrol: rename memcg_kmem_enabled()
2023-02-16 20:43:56 -08:00
pgalloc-track.h
…
pgtable-generic.c
mm: ptep_get() conversion
2023-06-19 16:19:25 -07:00
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 should use ptep_get_lockless()
2023-06-19 16:19:24 -07:00
readahead.c
mm: remove unnecessary pagevec includes
2023-06-23 16:59:31 -07:00
rmap.c
mm: ptep_get() conversion
2023-06-19 16:19:25 -07:00
rodata_test.c
mm/rodata_test: use PAGE_ALIGNED() helper
2022-10-03 14:03:05 -07:00
secretmem.c
mm/mlock: rename mlock_future_check() to mlock_future_ok()
2023-06-09 16:25:38 -07:00
shmem.c
shmem: fix smaps BUG sleeping while atomic
2023-08-24 14:59:47 -07:00
show_mem.c
mm: page_alloc: collect mem statistic into show_mem.c
2023-06-09 16:25:22 -07:00
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
slab updates for 6.5
2023-06-29 16:34:12 -07:00
slab.c
slab updates for 6.5
2023-06-29 16:34:12 -07:00
slab.h
kasan, slub: fix HW_TAGS zeroing with slub_debug
2023-07-08 09:29:32 -07:00
slub.c
slab updates for 6.5
2023-06-29 16:34:12 -07:00
sparse-vmemmap.c
mm: ptep_get() conversion
2023-06-19 16:19:25 -07:00
sparse.c
- Arnd Bergmann has fixed a bunch of -Wmissing-prototypes in
2023-06-28 10:59:38 -07:00
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
…
swap_state.c
mm: remove unnecessary pagevec includes
2023-06-23 16:59:31 -07:00
swap.c
mm: remove references to pagevec
2023-06-23 16:59:30 -07:00
swap.h
mm: remove the __swap_writepage return value
2023-02-02 22:33:33 -08:00
swapfile.c
mm/swapfile: fix wrong swap entry type for hwpoisoned swapcache page
2023-08-04 13:03:40 -07:00
truncate.c
mm: remove references to pagevec
2023-06-23 16:59:30 -07:00
usercopy.c
mm: Fix copy_from_user_nofault().
2023-04-12 17:36:23 -07:00
userfaultfd.c
mm: ptep_get() conversion
2023-06-19 16:19:25 -07:00
util.c
mm: uninline kstrdup()
2023-04-08 13:45:37 -07:00
vmalloc.c
mm: add a call to flush_cache_vmap() in vmap_pfn()
2023-08-21 13:07:21 -07:00
vmpressure.c
…
vmscan.c
mm: multi-gen LRU: don't spin during memcg release
2023-08-21 13:07:22 -07:00
vmstat.c
- Yosry Ahmed brought back some cgroup v1 stats in OOM logs.
2023-06-28 10:28:11 -07:00
workingset.c
Multi-gen LRU: fix workingset accounting
2023-06-09 16:25:46 -07:00
z3fold.c
mm: zswap: remove shrink from zpool interface
2023-06-19 16:19:27 -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
zsmalloc: fix races between modifications of fullness and isolated
2023-08-04 13:03:40 -07:00
zswap.c
mm: zswap: fix double invalidate with exclusive loads
2023-06-23 16:59:31 -07:00