Hugh Dickins 6c093b5718 mm: prep_compound_tail() clear page->private ... commit 5aae9265ee upstream. Although page allocation always clears page->private in the first page or head page of an allocation, it has never made a point of clearing page->private in the tails (though 0 is often what is already there). But now commit 71e2d666ef ("mm/huge_memory: do not clobber swp_entry_t during THP split") issues a warning when page_tail->private is found to be non-0 (unless it's swapcache). Change that warning to dump page_tail (which also dumps head), instead of just the head: so far we have seen dead000000000122, dead000000000003, dead000000000001 or 0000000000000002 in the raw output for tail private. We could just delete the warning, but today's consensus appears to want page->private to be 0, unless there's a good reason for it to be set: so now clear it in prep_compound_tail() (more general than just for THP; but not for high order allocation, which makes no pass down the tails). Link: https://lkml.kernel.org/r/1c4233bb-4e4d-5969-fbd4-96604268a285@google.com Fixes: 71e2d666ef ("mm/huge_memory: do not clobber swp_entry_t during THP split") Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: Mel Gorman <mgorman@techsingularity.net> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-11-04 00:00:23 +09:00
..
damon	mm/damon: validate if the pmd entry is present before accessing	2022-10-21 12:37:42 +02:00
kasan	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
kfence	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
backing-dev.c	writeback: avoid use-after-free after removing device	2022-08-28 14:02:43 -07:00
balloon_compaction.c
bootmem_info.c	bootmem: remove the vmemmap pages from kmemleak in put_page_bootmem	2022-08-28 14:02:45 -07:00
cma.c
cma.h
cma_debug.c
cma_sysfs.c
compaction.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
debug.c
debug_page_ref.c
debug_vm_pgtable.c
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
folio-compat.c
frontswap.c	frontswap: don't call ->init if no ops are registered	2022-09-26 12:14:34 -07:00
gup.c	mm/hugetlb: fix races when looking up a CONT-PTE/PMD size hugetlb page	2022-10-21 12:37:42 +02:00
gup_test.c
gup_test.h
highmem.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
hmm.c
huge_memory.c	mm: prep_compound_tail() clear page->private	2022-11-04 00:00:23 +09:00
hugetlb.c	mm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages	2022-10-29 10:08:30 +02:00
hugetlb_cgroup.c
hugetlb_vmemmap.c	mm: hugetlb_vmemmap: use PTRS_PER_PTE instead of PMD_SIZE / PAGE_SIZE	2022-08-08 18:06:43 -07:00
hugetlb_vmemmap.h	mm: hugetlb_vmemmap: improve hugetlb_vmemmap code readability	2022-08-08 18:06:43 -07:00
hwpoison-inject.c
init-mm.c
internal.h	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
interval_tree.c
io-mapping.c
ioremap.c
Kconfig	cxl for 6.0	2022-08-10 11:07:26 -07:00
Kconfig.debug
khugepaged.c	mm: gup: fix the fast GUP race against THP collapse	2022-09-26 12:14:33 -07:00
kmemleak.c	mm/kmemleak: prevent soft lockup in kmemleak_scan()'s object iteration loops	2022-11-04 00:00:23 +09:00
ksm.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
list_lru.c
maccess.c
madvise.c	mm,madvise,hugetlb: fix unexpected data loss with MADV_DONTNEED on hugetlbfs	2022-11-04 00:00:23 +09:00
Makefile
mapping_dirty_helpers.c
memblock.c	memblock updates for v5.20	2022-08-09 09:48:30 -07:00
memcontrol.c
memfd.c
memory-failure.c	mm,hwpoison: check mm when killing accessing process	2022-09-26 12:14:34 -07:00
memory.c	mm/uffd: fix warning without PTE_MARKER_UFFD_WP compiled in	2022-10-21 12:37:42 +02:00
memory_hotplug.c
mempolicy.c
mempool.c
memremap.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
memtest.c
migrate.c	mm: migrate: fix return value if all subpages of THPs are migrated successfully	2022-11-04 00:00:23 +09:00
migrate_device.c	mm/migrate_device.c: copy pte dirty bit to page	2022-09-11 16:22:30 -07:00
mincore.c
mlock.c
mm_init.c
mmap.c	mm/mmap: undo ->mmap() when arch_validate_flags() fails	2022-10-21 12:37:42 +02:00
mmap_lock.c
mmu_gather.c
mmu_notifier.c
mmzone.c
mprotect.c	mm/uffd: fix warning without PTE_MARKER_UFFD_WP compiled in	2022-10-21 12:37:42 +02:00
mremap.c
msync.c
nommu.c
oom_kill.c
page-writeback.c	writeback: avoid use-after-free after removing device	2022-08-28 14:02:43 -07:00
page_alloc.c	mm: prep_compound_tail() clear page->private	2022-11-04 00:00:23 +09:00
page_counter.c
page_ext.c
page_idle.c
page_io.c
page_isolation.c	mm/page_isolation: fix isolate_single_pageblock() isolation behavior	2022-09-26 12:14:34 -07:00
page_owner.c
page_poison.c
page_reporting.c
page_reporting.h
page_table_check.c
page_vma_mapped.c
pagewalk.c	mm: pagewalk: Fix race between unmap and page walker	2022-09-03 10:13:13 -07:00
percpu-internal.h
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c
pgalloc-track.h
pgtable-generic.c
process_vm_access.c
ptdump.c	mm: pagewalk: Fix race between unmap and page walker	2022-09-03 10:13:13 -07:00
readahead.c
rmap.c	mm/rmap: Fix anon_vma->degree ambiguity leading to double-reuse	2022-08-31 15:45:10 -07:00
rodata_test.c
secretmem.c	mm: fix dereferencing possible ERR_PTR	2022-09-11 16:22:31 -07:00
shmem.c	shmem: update folio if shmem_replace_page() updates the page	2022-08-28 14:02:43 -07:00
shrinker_debug.c
shuffle.c
shuffle.h
slab.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
slab.h
slab_common.c	mm/slab_common: fix possible double free of kmem_cache	2022-09-19 16:27:26 +02:00
slob.c
slub.c	mm: slub: fix flush_cpu_slab()/__free_slab() invocations in task context.	2022-09-22 21:48:48 +02:00
sparse-vmemmap.c	mm: hugetlb_vmemmap: move vmemmap code related to HugeTLB to hugetlb_vmemmap.c	2022-08-08 18:06:42 -07:00
sparse.c
swap.c	- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe	2022-08-05 16:32:45 -07:00
swap.h
swap_cgroup.c
swap_slots.c
swap_state.c	mm: fix VM_BUG_ON in __delete_from_swap_cache()	2022-09-11 16:22:31 -07:00
swapfile.c
truncate.c
usercopy.c
userfaultfd.c	mm/uffd: reset write protection when unregister with wp-mode	2022-08-20 15:17:45 -07:00
util.c	mm: fix BUG splat with kvmalloc + GFP_ATOMIC	2022-09-30 18:46:31 -07:00
vmacache.c
vmalloc.c
vmpressure.c
vmscan.c	vmscan: check folio_test_private(), not folio_get_private()	2022-09-11 16:22:31 -07:00
vmstat.c	mm: add DEVICE_ZONE to FOR_ALL_ZONES	2022-08-20 15:17:45 -07:00
workingset.c
z3fold.c
zbud.c
zpool.c
zsmalloc.c	mm/zsmalloc: do not attempt to free IS_ERR handle	2022-08-28 14:02:44 -07:00
zswap.c