Peter Xu 93b0d91787 mm/shmem: use page_mapping() to detect page cache for uffd continue ... mfill_atomic_install_pte() checks page->mapping to detect whether one page is used in the page cache. However as pointed out by Matthew, the page can logically be a tail page rather than always the head in the case of uffd minor mode with UFFDIO_CONTINUE. It means we could wrongly install one pte with shmem thp tail page assuming it's an anonymous page. It's not that clear even for anonymous page, since normally anonymous pages also have page->mapping being setup with the anon vma. It's safe here only because the only such caller to mfill_atomic_install_pte() is always passing in a newly allocated page (mcopy_atomic_pte()), whose page->mapping is not yet setup. However that's not extremely obvious either. For either of above, use page_mapping() instead. Link: https://lkml.kernel.org/r/Y2K+y7wnhC4vbnP2@x1n Fixes: 153132571f ("userfaultfd/shmem: support UFFDIO_CONTINUE for shmem") Signed-off-by: Peter Xu <peterx@redhat.com> Reported-by: Matthew Wilcox <willy@infradead.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2022-11-08 15:57:23 -08:00
..
damon	- Alistair Popple has a series which addresses a race which causes page	2022-10-14 12:28:43 -07:00
kasan	Random number generator fixes for Linux 6.1-rc1.	2022-10-16 15:27:07 -07:00
kfence	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
kmsan	x86: fortify: kmsan: fix KMSAN fortify builds	2022-10-28 13:37:23 -07:00
backing-dev.c	mm: backing-dev: Remove the unneeded result variable	2022-09-11 20:26:02 -07:00
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
cma.c	Revert "mm/cma.c: remove redundant cma_mutex lock"	2022-05-13 15:11:26 -07:00
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	- Alistair Popple has a series which addresses a race which causes page	2022-10-14 12:28:43 -07:00
debug_page_ref.c
debug_vm_pgtable.c	docs: rename Documentation/vm to Documentation/mm	2022-06-27 12:52:53 -07:00
debug.c	mm: remove the vma linked list	2022-09-26 19:46:26 -07:00
dmapool.c	mm/dmapool.c: revert "make dma pool to use kmalloc_node"	2022-01-15 16:30:28 +02:00
early_ioremap.c	mm/early_ioremap: declare early_memremap_pgprot_adjust()	2022-03-22 15:57:11 -07:00
fadvise.c	riscv: compat: syscall: Add compat_sys_call_table implementation	2022-04-26 13:36:25 -07:00
failslab.c	mm: fix missing handler for __GFP_NOWARN	2022-05-19 14:08:55 -07:00
filemap.c	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
folio-compat.c	mm: remove try_to_free_swap()	2022-10-03 14:02:53 -07:00
frontswap.c	frontswap: don't call ->init if no ops are registered	2022-09-26 12:14:34 -07:00
gup_test.c	mm: rename is_pinnable_page() to is_longterm_pinnable_page()	2022-07-17 17:14:27 -07:00
gup_test.h
gup.c	Five hotfixes - three for nilfs2, two for MM. For are cc:stable, one is	2022-10-12 11:16:58 -07:00
highmem.c	highmem: fix kmap_to_page() for kmap_local_page() addresses	2022-10-12 18:51:51 -07:00
hmm.c	mm/swap: add swp_offset_pfn() to fetch PFN from swap entry	2022-09-26 19:46:05 -07:00
huge_memory.c	Partly revert "mm/thp: carry over dirty bit when thp splits on pmd"	2022-11-08 15:57:23 -08:00
hugetlb_cgroup.c	hugetlb_cgroup: use helper for_each_hstate and hstate_index	2022-09-11 20:25:53 -07:00
hugetlb_vmemmap.c	mm: hugetlb_vmemmap: simplify reset_struct_pages()	2022-09-11 20:25:58 -07:00
hugetlb_vmemmap.h	mm: hugetlb_vmemmap: improve hugetlb_vmemmap code readability	2022-08-08 18:06:43 -07:00
hugetlb.c	hugetlbfs: don't delete error page from pagecache	2022-11-08 15:57:22 -08:00
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: remove rb tree.	2022-09-26 19:46:16 -07:00
internal.h	mm/page_alloc: make boot_nodestats static	2022-10-03 14:03:30 -07:00
interval_tree.c
io-mapping.c
ioremap.c	mm: ioremap: Add ioremap/iounmap_allowed()	2022-06-27 12:22:31 +01:00
Kconfig	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
Kconfig.debug	Two followon fixes for the post-5.19 series "Use pageblock_order for cma	2022-05-27 11:40:49 -07:00
khugepaged.c	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
kmemleak.c	mm/kmemleak: prevent soft lockup in kmemleak_scan()'s object iteration loops	2022-10-28 13:37:22 -07:00
ksm.c	ksm: use a folio in replace_page()	2022-10-03 14:02:53 -07:00
list_lru.c	mm: kmem: make mem_cgroup_from_obj() vmalloc()-safe	2022-06-16 19:48:31 -07:00
maccess.c	asm-generic updates for 5.18	2022-03-23 18:03:08 -07:00
madvise.c	mm,madvise,hugetlb: fix unexpected data loss with MADV_DONTNEED on hugetlbfs	2022-10-28 13:37:22 -07:00
Makefile	mm: memcontrol: drop dead CONFIG_MEMCG_SWAP config symbol	2022-10-03 14:03:36 -07:00
mapping_dirty_helpers.c	mm: move tlb_flush_pending inline helpers to mm_inline.h	2022-01-15 16:30:27 +02:00
memblock.c	mm: add pageblock_align() macro	2022-10-03 14:03:04 -07:00
memcontrol.c	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
memfd.c	memfd: fix F_SEAL_WRITE after shmem huge page allocated	2022-03-05 11:08:32 -08:00
memory_hotplug.c	mm: add pageblock_aligned() macro	2022-10-03 14:03:04 -07:00
memory-failure.c	hugetlbfs: don't delete error page from pagecache	2022-11-08 15:57:22 -08:00
memory-tiers.c	memory tier, sysfs: rename attribute "nodes" to "nodelist"	2022-10-28 13:37:22 -07:00
memory.c	mm: use update_mmu_tlb() on the second thread	2022-10-12 18:51:50 -07:00
mempolicy.c	mm/mempolicy: fix mbind_range() arguments to vma_merge()	2022-10-20 21:27:21 -07:00
mempool.c	mm/mempool: use might_alloc()	2022-06-16 19:48:30 -07:00
memremap.c	mm/memremap.c: map FS_DAX device memory as decrypted	2022-11-08 15:57:23 -08:00
memtest.c
migrate_device.c	mm/migrate_device.c: add migrate_device_range()	2022-10-12 18:51:49 -07:00
migrate.c	mm: migrate: fix return value if all subpages of THPs are migrated successfully	2022-10-28 13:37:22 -07:00
mincore.c	mm: teach core mm about pte markers	2022-05-13 07:20:09 -07:00
mlock.c	mm/mlock: drop dead code in count_mm_mlocked_page_nr()	2022-09-26 19:46:27 -07:00
mm_init.c	mm: multi-gen LRU: groundwork	2022-09-26 19:46:09 -07:00
mm_slot.h	mm: introduce common struct mm_slot	2022-10-03 14:02:43 -07:00
mmap_lock.c
mmap.c	mm/mmap: fix memory leak in mmap_region()	2022-11-08 15:57:23 -08:00
mmu_gather.c	kmsan: unpoison @tlb in arch_tlb_gather_mmu()	2022-10-12 18:51:48 -07:00
mmu_notifier.c	mm/mmu_notifier.c: fix race in mmu_interval_notifier_remove()	2022-04-21 20:01:10 -07:00
mmzone.c	mm: multi-gen LRU: groundwork	2022-09-26 19:46:09 -07:00
mprotect.c	mm/uffd: fix warning without PTE_MARKER_UFFD_WP compiled in	2022-10-12 15:56:46 -07:00
mremap.c	mm: add merging after mremap resize	2022-09-26 19:46:28 -07:00
msync.c	mm/msync: use vma_find() instead of vma linked list	2022-09-26 19:46:25 -07:00
nommu.c	mm: remove the vma linked list	2022-09-26 19:46:26 -07:00
oom_kill.c	mm: reduce noise in show_mem for lowmem allocations	2022-09-26 19:46:29 -07:00
page_alloc.c	mm: prep_compound_tail() clear page->private	2022-10-28 13:37:22 -07:00
page_counter.c	mm: page_counter: remove unneeded atomic ops for low/min	2022-09-11 20:26:01 -07:00
page_ext.c	page_ext: introduce boot parameter 'early_page_ext'	2022-09-11 20:26:02 -07:00
page_idle.c	mm: don't be stuck to rmap lock on reclaim path	2022-05-19 14:08:54 -07:00
page_io.c	swap: convert swap_writepage() to use a folio	2022-10-03 14:02:52 -07:00
page_isolation.c	mm/page_isolation: fix clang deadcode warning	2022-10-28 13:37:22 -07:00
page_owner.c	mm: reuse pageblock_start/end_pfn() macro	2022-10-03 14:03:03 -07:00
page_poison.c
page_reporting.c
page_reporting.h
page_table_check.c	mm/page_table_check: fix typos	2022-10-03 14:03:27 -07:00
page_vma_mapped.c	mm/swap: add swp_offset_pfn() to fetch PFN from swap entry	2022-09-26 19:46:05 -07:00
page-writeback.c	mm: export balance_dirty_pages_ratelimited_flags()	2022-09-26 12:28:07 +02:00
pagewalk.c	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
percpu-internal.h	percpu: improve percpu_alloc_percpu event trace	2022-05-13 07:20:18 -07:00
percpu-km.c
percpu-stats.c	mm: use vmalloc_array and vcalloc for array allocations	2022-03-08 09:30:46 -05:00
percpu-vm.c
percpu.c	mm: percpu: use kmemleak_ignore_phys() instead of kmemleak_free()	2022-07-17 17:14:47 -07:00
pgalloc-track.h
pgtable-generic.c	mm: avoid unnecessary flush on change_huge_pmd()	2022-05-13 07:20:05 -07:00
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	mm: add PSI accounting around ->read_folio and ->readahead calls	2022-09-20 08:24:38 -06:00
rmap.c	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
rodata_test.c	mm/rodata_test: use PAGE_ALIGNED() helper	2022-10-03 14:03:05 -07:00
secretmem.c	mm/secretmem: remove reduntant return value	2022-10-03 14:03:36 -07:00
shmem.c	mm/shmem: ensure proper fallback if page faults	2022-10-28 13:37:23 -07:00
shrinker_debug.c	mm: shrinkers: fix double kfree on shrinker name	2022-07-29 18:07:13 -07:00
shuffle.c	mm/shuffle: convert module_param_call to module_param_cb	2022-10-03 14:03:07 -07:00
shuffle.h
slab_common.c	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
slab.c	Random number generator fixes for Linux 6.1-rc1.	2022-10-16 15:27:07 -07:00
slab.h	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
slob.c	Merge branch 'slab/for-6.1/kmalloc_size_roundup' into slab/for-next	2022-09-29 11:30:55 +02:00
slub.c	treewide: use prandom_u32_max() when possible, part 1	2022-10-11 17:42:55 -06:00
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	mm: memory_hotplug: enumerate all supported section flags	2022-07-03 18:08:49 -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	mm/swap: convert put_swap_page() to put_swap_folio()	2022-10-03 14:02:46 -07:00
swap_state.c	swap_state: convert free_swap_cache() to use a folio	2022-10-03 14:02:51 -07:00
swap.c	mm: add folio_add_lru_vma()	2022-10-03 14:02:45 -07:00
swap.h	mm: remove lookup_swap_cache()	2022-10-03 14:02:51 -07:00
swapfile.c	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
truncate.c	mm: add split_folio()	2022-10-03 14:02:45 -07:00
usercopy.c	usercopy: use unsigned long instead of uintptr_t	2022-07-01 17:03:38 -07:00
userfaultfd.c	mm/shmem: use page_mapping() to detect page cache for uffd continue	2022-11-08 15:57:23 -08:00
util.c	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
vmalloc.c	mm: kmsan: maintain KMSAN metadata for page operations	2022-10-03 14:03:20 -07:00
vmpressure.c	mm/vmpressure: fix data-race with memcg->socket_pressure	2021-11-06 13:30:40 -07:00
vmscan.c	mglru: mm/vmscan.c: fix imprecise comments	2022-10-07 14:28:40 -07:00
vmstat.c	- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in	2022-10-10 17:53:04 -07:00
workingset.c	mm: multi-gen LRU: minimal implementation	2022-09-26 19:46:09 -07:00
z3fold.c	mm: Convert all PageMovable users to movable_operations	2022-08-02 12:34:03 -04:00
zbud.c
zpool.c	zpool: remove the list of pools_head	2022-01-15 16:30:31 +02:00
zsmalloc.c	zsmalloc: zs_destroy_pool: add size_class NULL check	2022-10-20 21:27:21 -07:00
zswap.c	mm/swap: remove the end_write_func argument to __swap_writepage	2022-09-11 20:25:50 -07:00