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linux/mm
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David Hildenbrand 47fa30118f mm/huge_memory: check pmd_special() only after pmd_present() 
We should only check for pmd_special() after we made sure that we have a
present PMD.  For example, if we have a migration PMD, pmd_special() might
indicate that we have a special PMD although we really don't.

This fixes confusing migration entries as PFN mappings, and not doing what
we are supposed to do in the "is_swap_pmd()" case further down in the
function -- including messing up COW, page table handling and accounting.

Link: https://lkml.kernel.org/r/20240926154234.2247217-1-david@redhat.com
Fixes: bc02afbd4d73 ("mm/fork: accept huge pfnmap entries")
Signed-off-by: David Hildenbrand <david@redhat.com>
Reported-by: syzbot+bf2c35fa302ebe3c7471@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/lkml/66f15c8d.050a0220.c23dd.000f.GAE@google.com/
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-10-09 12:47:19 -07:00
..
damon
mm/damon/Kconfig: update DAMON doc URL
2024-09-26 14:01:44 -07:00
kasan
Rust changes for v6.12
2024-09-25 10:25:40 -07:00
kfence
mm: kfence: fix elapsed time for allocated/freed track
2024-09-26 14:01:44 -07:00
kmsan
kmsan: do not pass NULL pointers as 0
2024-07-03 19:30:26 -07:00
backing-dev.c
writeback: support retrieving per group debug writeback stats of bdi
2024-05-05 17:53:51 -07:00
balloon_compaction.c
mm: remove MIGRATE_SYNC_NO_COPY mode
2024-07-03 19:30:00 -07:00
bootmem_info.c
bootmem: use kmemleak_free_part_phys in put_page_bootmem
2023-10-25 16:47:13 -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: add sysfs file 'release_pages_success'
2024-02-22 10:24:57 -08:00
cma.c
mm/cma: add cma_{alloc,free}_folio()
2024-09-03 21:15:36 -07:00
cma.h
mm/cma: add sysfs file 'release_pages_success'
2024-02-22 10:24:57 -08:00
compaction.c
mm:page_alloc: fix the NULL ac->nodemask in __alloc_pages_slowpath()
2024-09-03 21:15:47 -07:00
debug_page_alloc.c
mm: page_alloc: consolidate free page accounting
2024-04-25 20:56:04 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: Use pxdp_get() for accessing page table entries
2024-09-17 01:07:01 -07:00
debug.c
mm: support only one page_type per page
2024-09-03 21:15:43 -07:00
dmapool_test.c
mm/dmapool: add MODULE_DESCRIPTION()
2024-07-03 19:29:58 -07:00
dmapool.c
mm/mempool/dmapool: remove CONFIG_DEBUG_SLAB ifdefs
2023-12-05 11:17:58 +01:00
early_ioremap.c
mm/early_ioremap.c: improve the execution efficiency of early_ioremap_setup()
2023-06-09 16:25:56 -07:00
execmem.c
mm/execmem, arch: convert remaining overrides of module_alloc to execmem
2024-05-14 00:31:43 -07:00
fadvise.c
introduce fd_file(), convert all accessors to it.
2024-08-12 22:00:43 -04:00
fail_page_alloc.c
fault-inject: improve build for CONFIG_FAULT_INJECTION=n
2024-09-01 20:43:33 -07:00
failslab.c
fault-inject: improve build for CONFIG_FAULT_INJECTION=n
2024-09-01 20:43:33 -07:00
filemap.c
mm/filemap: fix filemap_get_folios_contig THP panic
2024-09-26 14:01:43 -07:00
folio-compat.c
mm: remove putback_lru_page()
2024-09-09 16:38:59 -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/hugetlb: simplify refs in memfd_alloc_folio
2024-09-26 14:01:44 -07:00
highmem.c
mm/highmem: make nr_free_highpages() return "unsigned long"
2024-07-03 19:30:06 -07:00
hmm.c
mm: provide mm_struct and address to huge_ptep_get()
2024-07-12 15:52:15 -07:00
huge_memory.c
mm/huge_memory: check pmd_special() only after pmd_present()
2024-10-09 12:47:19 -07:00
hugetlb_cgroup.c
mm: memcg: don't call propagate_protected_usage() needlessly
2024-09-01 20:25:50 -07:00
hugetlb_vmemmap.c
mm/hugetlb_vmemmap: don't synchronize_rcu() without HVO
2024-09-01 20:25:45 -07:00
hugetlb_vmemmap.h
mm: hugetlb_vmemmap: fix reference to nonexistent file
2023-10-25 16:47:14 -07:00
hugetlb.c
mm/hugetlb: fix memfd_pin_folios resv_huge_pages leak
2024-09-26 14:01:43 -07:00
hwpoison-inject.c
mm/hwpoison: add MODULE_DESCRIPTION()
2024-07-03 19:29:58 -07:00
init-mm.c
mm: Deprecate pasid field
2023-12-12 10:11:32 +01:00
internal.h
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -07:00
interval_tree.c
…
io-mapping.c
…
ioremap.c
mm: ioremap: remove unneeded ioremap_allowed and iounmap_allowed
2023-08-18 10:12:36 -07:00
Kconfig
mm: make SPLIT_PTE_PTLOCKS depend on SMP
2024-09-26 14:01:43 -07:00
Kconfig.debug
slub: Introduce CONFIG_SLUB_RCU_DEBUG
2024-08-27 14:12:51 +02:00
khugepaged.c
mm,tmpfs: consider end of file write in shmem_is_huge
2024-09-09 16:39:12 -07:00
kmemleak.c
mm/kmemleak: use IS_ERR_PCPU() for pointer in the percpu address space
2024-09-03 21:15:38 -07:00
ksm.c
mm: remove PageSwapCache
2024-09-03 21:15:44 -07:00
list_lru.c
mm: list_lru: fix UAF for memory cgroup
2024-08-07 18:33:56 -07:00
maccess.c
mm: Fix copy_from_user_nofault().
2023-04-12 17:36:23 -07:00
madvise.c
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -07:00
Makefile
mm: introduce numa_emulation
2024-09-03 21:15:31 -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: updates for 6.12-rc1
2024-09-25 11:35:19 -07:00
memcontrol-v1.c
struct fd layout change (and conversion to accessor helpers)
2024-09-23 09:35:36 -07:00
memcontrol-v1.h
memcg: cleanup with !CONFIG_MEMCG_V1
2024-09-17 01:07:00 -07:00
memcontrol.c
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -07:00
memfd.c
mm/hugetlb: simplify refs in memfd_alloc_folio
2024-09-26 14:01:44 -07:00
memory_hotplug.c
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -07:00
memory-failure.c
mm: migrate: add isolate_folio_to_list()
2024-09-03 21:15:59 -07:00
memory-tiers.c
memory tiers: use default_dram_perf_ref_source in log message
2024-09-26 14:01:44 -07:00
memory.c
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -07:00
mempolicy.c
mm,memcg: provide per-cgroup counters for NUMA balancing operations
2024-09-03 21:15:36 -07:00
mempool.c
mm: fix xyz_noprof functions calling profiled functions
2024-06-05 19:19:26 -07:00
memremap.c
mm: convert put_devmap_managed_page_refs() to put_devmap_managed_folio_refs()
2024-05-05 17:53:49 -07:00
memtest.c
memtest: use {READ,WRITE}_ONCE in memory scanning
2024-03-13 12:12:21 -07:00
migrate_device.c
mm: remap unused subpages to shared zeropage when splitting isolated thp
2024-09-09 16:39:03 -07:00
migrate.c
mm: migrate: annotate data-race in migrate_folio_unmap()
2024-09-26 14:01:44 -07:00
mincore.c
mm: provide mm_struct and address to huge_ptep_get()
2024-07-12 15:52:15 -07:00
mlock.c
Random number generator updates for Linux 6.11-rc1.
2024-07-24 10:29:50 -07:00
mm_init.c
mm: drop CONFIG_HAVE_ARCH_NODEDATA_EXTENSION
2024-09-03 21:15:28 -07:00
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
2024-07-03 19:30:26 -07:00
mmap.c
lsm/stable-6.12 PR 20240923
2024-09-24 10:18:15 -07:00
mmu_gather.c
mm/mmu_gather: improve cond_resched() handling with large folios and expensive page freeing
2024-02-22 15:27:17 -08:00
mmu_notifier.c
mm: move internal core VMA manipulation functions to own file
2024-09-01 20:25:54 -07:00
mmzone.c
mm: improve code consistency with zonelist_* helper functions
2024-09-01 20:25:55 -07:00
mprotect.c
mm/mprotect: replace can_modify_mm with can_modify_vma
2024-09-03 21:15:41 -07:00
mremap.c
mm/mremap: replace can_modify_mm with can_modify_vma
2024-09-03 21:15:41 -07:00
mseal.c
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -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 follow_page()
2024-09-01 20:26:01 -07:00
numa_emulation.c
mm: introduce numa_emulation
2024-09-03 21:15:31 -07:00
numa_memblks.c
mm: make range-to-target_node lookup facility a part of numa_memblks
2024-09-03 21:15:32 -07:00
numa.c
mm: make range-to-target_node lookup facility a part of numa_memblks
2024-09-03 21:15:32 -07:00
oom_kill.c
memory: remove the now superfluous sentinel element from ctl_table array
2024-04-25 20:56:32 -07:00
page_alloc.c
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -07:00
page_counter.c
mm, memcg: cg2 memory{.swap,}.peak write handlers
2024-09-01 20:25:53 -07:00
page_ext.c
mm: don't account memmap per-node
2024-08-15 22:16:14 -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: fix swap_read_folio_zeromap() for large folios with partial zeromap
2024-09-17 01:07:01 -07:00
page_isolation.c
mm: remove migration for HugePage in isolate_single_pageblock()
2024-09-03 21:15:40 -07:00
page_owner.c
mm/page-owner: use gfp_nested_mask() instead of open coded masking
2024-05-19 14:40:44 -07:00
page_poison.c
mm/page_poison: replace kmap_atomic() with kmap_local_page()
2023-12-10 16:51:50 -08:00
page_reporting.c
mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER
2024-01-08 15:27:15 -08:00
page_reporting.h
…
page_table_check.c
mm/page_table_check: fix crash on ZONE_DEVICE
2024-06-15 10:43:04 -07:00
page_vma_mapped.c
mm: make page_mapped_in_vma conditional on CONFIG_MEMORY_FAILURE
2024-05-05 17:53:45 -07:00
page-writeback.c
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -07:00
pagewalk.c
mm/pagewalk: check pfnmap for folio_walk_start()
2024-09-17 01:06:58 -07:00
percpu-internal.h
mm: remove CONFIG_MEMCG_KMEM
2024-07-10 12:14:54 -07:00
percpu-km.c
…
percpu-stats.c
…
percpu-vm.c
percpu: clean up all mappings when pcpu_map_pages() fails
2024-04-25 20:55:49 -07:00
percpu.c
percpu: remove pcpu_alloc_size()
2024-09-01 20:26:04 -07:00
pgalloc-track.h
…
pgtable-generic.c
mm: fix race between __split_huge_pmd_locked() and GUP-fast
2024-05-07 10:37:00 -07:00
process_vm_access.c
mm: fix process_vm_rw page counts
2023-12-10 16:51:39 -08:00
ptdump.c
mm: ptdump: add check_wx_pages debugfs attribute
2024-02-22 10:24:47 -08:00
readahead.c
struct fd layout change (and conversion to accessor helpers)
2024-09-23 09:35:36 -07:00
rmap.c
mm: introduce a pageflag for partially mapped folios
2024-09-09 16:39:04 -07:00
rodata_test.c
mm/rodata_test: use PAGE_ALIGNED() helper
2022-10-03 14:03:05 -07:00
secretmem.c
mm/secretmem: use a folio in secretmem_fault()
2023-08-21 13:38:02 -07:00
shmem_quota.c
shmem_quota: build the object file conditionally to the config option
2024-09-01 20:25:45 -07:00
shmem.c
\n
2024-09-23 10:49:28 -07:00
show_mem.c
mm/show_mem.c: report alloc tags in human readable units
2024-09-17 01:07:00 -07:00
shrinker_debug.c
mm: shrinker: use min() to improve shrinker_debugfs_scan_write()
2024-09-03 21:15:40 -07:00
shrinker.c
mm: shrinker: use kvzalloc_node() from expand_one_shrinker_info()
2024-01-05 09:58:32 -08:00
shuffle.c
mm/shuffle: convert module_param_call to module_param_cb
2022-10-03 14:03:07 -07:00
shuffle.h
mm, treewide: rename MAX_ORDER to MAX_PAGE_ORDER
2024-01-08 15:27:15 -08:00
slab_common.c
mm, slab: suppress warnings in test_leak_destroy kunit test
2024-10-02 16:28:46 +02:00
slab.h
mm, slab: suppress warnings in test_leak_destroy kunit test
2024-10-02 16:28:46 +02:00
slub.c
mm, slab: suppress warnings in test_leak_destroy kunit test
2024-10-02 16:28:46 +02:00
sparse-vmemmap.c
mm: don't account memmap per-node
2024-08-15 22:16:14 -07:00
sparse.c
A set of X86 fixes:
2024-09-01 14:43:08 -07:00
swap_cgroup.c
mm: attempt to batch free swap entries for zap_pte_range()
2024-09-03 21:15:33 -07:00
swap_slots.c
mm: swap: update get_swap_pages() to take folio order
2024-04-25 20:56:37 -07:00
swap_state.c
mm: add nr argument in mem_cgroup_swapin_uncharge_swap() helper to support large folios
2024-09-17 01:07:01 -07:00
swap.c
mm: remove isolate_lru_page()
2024-09-09 16:38:59 -07:00
swap.h
mm: fix swap_read_folio_zeromap() for large folios with partial zeromap
2024-09-17 01:07:01 -07:00
swapfile.c
swap: convert swapon() to use a folio
2024-09-09 16:38:58 -07:00
truncate.c
mm: Fix missing folio invalidation calls during truncation
2024-08-24 16:09:16 +02:00
usercopy.c
mm: Fix copy_from_user_nofault().
2023-04-12 17:36:23 -07:00
userfaultfd.c
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -07:00
util.c
mm: only enforce minimum stack gap size if it's sensible
2024-09-01 20:26:02 -07:00
vma_internal.h
mm: remove duplicated include in vma_internal.h
2024-09-01 20:26:02 -07:00
vma.c
mm/vma: return the exact errno in vms_gather_munmap_vmas()
2024-09-17 01:07:00 -07:00
vma.h
mm: make vma_prepare() and friends static and internal to vma.c
2024-09-03 21:15:54 -07:00
vmalloc.c
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -07:00
vmpressure.c
eventfd: simplify eventfd_signal()
2023-11-28 14:08:38 +01:00
vmscan.c
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -07:00
vmstat.c
mm: split underused THPs
2024-09-09 16:39:04 -07:00
workingset.c
cachestat: do not flush stats in recency check
2024-07-03 22:40:37 -07:00
z3fold.c
mm/z3fold: add __percpu annotation to *unbuddied pointer in struct z3fold_pool
2024-09-01 20:25:56 -07:00
zbud.c
mm: zpool: return pool size in pages
2024-04-25 20:55:48 -07:00
zpool.c
mm: zpool: return pool size in pages
2024-04-25 20:55:48 -07:00
zsmalloc.c
ALong with the usual shower of singleton patches, notable patch series in
2024-09-21 07:29:05 -07:00
zswap.c
mm: remove code to handle same filled pages
2024-09-03 21:15:47 -07:00