Steven Price
393a1aa421
mm: pagewalk: Fix race between unmap and page walker ...
commit 8782fb61cc848364e1e1599d76d3c9dd58a1cc06 upstream.
The mmap lock protects the page walker from changes to the page tables
during the walk. However a read lock is insufficient to protect those
areas which don't have a VMA as munmap() detaches the VMAs before
downgrading to a read lock and actually tearing down PTEs/page tables.
For users of walk_page_range() the solution is to simply call pte_hole()
immediately without checking the actual page tables when a VMA is not
present. We now never call __walk_page_range() without a valid vma.
For walk_page_range_novma() the locking requirements are tightened to
require the mmap write lock to be taken, and then walking the pgd
directly with 'no_vma' set.
This in turn means that all page walkers either have a valid vma, or
it's that special 'novma' case for page table debugging. As a result,
all the odd '(!walk->vma && !walk->no_vma)' tests can be removed.
Fixes: dd2283f260
2022-10-15 07:54:36 +02:00
kasan: fix incorrect arguments passing in kasan_add_zero_shadow
2021-01-27 11:47:53 +01:00
mm: bdi: initialize bdi_min_ratio when bdi is unregistered
2021-12-14 14:49:00 +01:00
cma: don't quit at first error when activating reserved areas
2020-09-03 11:26:51 +02:00
mm, compaction: fast_find_migrateblock() should return pfn in the target zone
2022-06-14 18:11:46 +02:00
mm/filemap: fix storing to a THP shadow entry
2021-06-10 13:37:15 +02:00
mm/gup: fix gup_fast with dynamic page table folding
2020-10-01 13:18:24 +02:00
mm/huge_memory.c: don't discard hugepage if other processes are mapping it
2021-07-14 16:53:47 +02:00
hugetlb: fix huge_pmd_unshare address update
2022-06-14 18:11:48 +02:00
mm/thp: fix vma_address() if virtual address below file offset
2021-06-30 08:47:52 -04:00
mm/zsmalloc.c: drop ZSMALLOC_PGTABLE_MAPPING
2020-12-16 10:56:59 +01:00
khugepaged: fix wrong result value for trace_mm_collapse_huge_page_isolate()
2021-05-19 10:08:27 +02:00
Revert "mm: kmemleak: take a full lowmem check in kmemleak_*_phys()"
2022-09-15 12:04:49 +02:00
ksm: fix potential missing rmap_item for stable_node
2021-05-19 10:08:27 +02:00
mm: list_lru: set shrinker map bit when child nr_items is not zero
2020-12-11 13:23:31 +01:00
mm: fix madivse_pageout mishandling on non-LRU page
2022-10-05 10:37:43 +02:00
memblock: use kfree() to release kmalloced memblock regions
2022-03-02 11:41:18 +01:00
mm/memcontrol: return 1 from cgroup.memory __setup() handler
2022-04-15 14:18:29 +02:00
memfd: fix F_SEAL_WRITE after shmem huge page allocated
2022-03-08 19:07:49 +01:00
mm/memory-failure: make sure wait for page writeback in memory_failure
2021-06-23 14:41:23 +02:00
mm: hugetlb: fix missing cache flush in copy_huge_page_from_user()
2022-05-15 19:54:47 +02:00
mm/memory_hotplug: use "unsigned long" for PFN in zone_for_pfn_range()
2021-09-22 12:26:43 +02:00
mm/mempolicy: fix uninit-value in mpol_rebind_policy()
2022-07-29 17:14:16 +02:00
mm/migrate_device.c: flush TLB while holding PTL
2022-10-05 10:37:43 +02:00
mm: Fix TLB flush for not-first PFNMAP mappings in unmap_region()
2022-09-20 12:28:00 +02:00
mm: fix kthread_use_mm() vs TLB invalidate
2020-09-03 11:26:51 +02:00
arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
2022-05-15 19:54:46 +02:00
mm/mremap: hold the rmap lock in write mode when moving page table entries.
2022-08-25 11:17:20 +02:00
x86/mm: split vmalloc_sync_all()
2020-03-25 08:25:58 +01:00
oom_kill.c: futex: delay the OOM reaper to allow time for proper futex cleanup
2022-04-27 13:50:48 +02:00
mm: prevent page_frag_alloc() from corrupting the memory
2022-10-05 10:37:43 +02:00
mm/page_counter.c: fix protection usage propagation
2020-08-21 13:05:27 +02:00
mm: fix unexpected zeroed page mapping with zram swap
2022-05-12 12:23:48 +02:00
mm/memory_hotplug: drain per-cpu pages again during memory offline
2020-09-23 12:40:47 +02:00
mm/page_owner: change split_page_owner to take a count
2020-10-29 09:57:52 +01:00
mm/thp: another PVMW_SYNC fix in page_vma_mapped_walk()
2021-06-30 08:47:55 -04:00
mm: pagewalk: Fix race between unmap and page walker
2022-10-15 07:54:36 +02:00
percpu: fix first chunk size calculation for populated bitmap
2020-09-23 12:40:45 +02:00
mm/thp: fix __split_huge_pmd_locked() on shmem migration entry
2021-06-30 08:47:52 -04:00
mm/rmap: Fix anon_vma->degree ambiguity leading to double-reuse
2022-09-05 10:27:46 +02:00
shmem: fix a race between shmem_unused_huge_shrink and shmem_evict_inode
2022-01-27 09:19:29 +01:00
mm/shuffle: don't move pages between zones and don't read garbage memmaps
2020-09-03 11:26:51 +02:00
mm: kmemleak: slob: respect SLAB_NOLEAKTRACE flag
2021-11-26 10:47:21 +01:00
mm: slab: fix kmem_cache_create failed when sysfs node not destroyed
2021-07-25 14:35:14 +02:00
mm/slub: fix to return errno if kmalloc() fails
2022-09-28 11:04:04 +02:00
mm/sparse: add the missing sparse_buffer_fini() in error branch
2021-05-14 09:44:32 +02:00
mm/swap_state: fix a data race in swapin_nr_pages
2020-10-01 13:18:08 +02:00
swap: fix swapfile read/write offset
2021-03-07 12:20:49 +01:00
mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page()
2021-06-30 08:47:53 -04:00
mm/usercopy: return 1 from hardened_usercopy __setup() handler
2022-04-15 14:18:30 +02:00
mm: userfaultfd: fix missing cache flush in mcopy_atomic_pte() and __mcopy_atomic()
2022-05-15 19:54:47 +02:00
random: move randomize_page() into mm where it belongs
2022-06-22 14:11:17 +02:00
mm/vunmap: add cond_resched() in vunmap_pmd_range
2020-09-03 11:26:52 +02:00
mm,vmscan: fix divide by zero in get_scan_count
2021-09-22 12:26:37 +02:00
arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
2022-05-15 19:54:46 +02:00
mm/z3fold: fix potential memory leak in z3fold_destroy_pool()
2021-07-14 16:53:47 +02:00
zsmalloc: fix races between asynchronous zspage free and page migration
2022-06-06 08:33:50 +02:00
393a1aa421