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Nadav Amit 0e88904cb7 userfaultfd: mark uffd_wp regardless of VM_WRITE flag 
When a PTE is set by UFFD operations such as UFFDIO_COPY, the PTE is
currently only marked as write-protected if the VMA has VM_WRITE flag
set.  This seems incorrect or at least would be unexpected by the users.

Consider the following sequence of operations that are being performed
on a certain page:

	mprotect(PROT_READ)
	UFFDIO_COPY(UFFDIO_COPY_MODE_WP)
	mprotect(PROT_READ|PROT_WRITE)

At this point the user would expect to still get UFFD notification when
the page is accessed for write, but the user would not get one, since
the PTE was not marked as UFFD_WP during UFFDIO_COPY.

Fix it by always marking PTEs as UFFD_WP regardless on the
write-permission in the VMA flags.

Link: https://lkml.kernel.org/r/20220217211602.2769-1-namit@vmware.com
Fixes: 292924b26024 ("userfaultfd: wp: apply _PAGE_UFFD_WP bit")
Signed-off-by: Nadav Amit <namit@vmware.com>
Acked-by: Peter Xu <peterx@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-04-21 20:01:09 -07:00
..
damon
mm/damon: prevent activated scheme from sleeping by deactivated schemes
2022-04-01 11:46:09 -07:00
kasan
kasan: fix hw tags enablement when KUNIT tests are disabled
2022-04-15 14:49:55 -07:00
kfence
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-15 14:49:55 -07:00
backing-dev.c
remove congestion tracking framework
2022-03-22 15:57:01 -07:00
balloon_compaction.c
mm/balloon_compaction: make balloon page compaction callbacks static
2022-03-28 16:52:57 -04:00
bootmem_info.c
bootmem: Use page->index instead of page->freelist
2022-01-06 12:27:03 +01:00
cma_debug.c
mm/cma: change cma mutex to irq safe spinlock
2021-05-05 11:27:21 -07:00
cma_sysfs.c
mm: cma: support sysfs
2021-05-05 11:27:24 -07:00
cma.c
mm/cma: provide option to opt out from exposing pages on activation failure
2022-03-22 15:57:09 -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
mm: compaction: fix compiler warning when CONFIG_COMPACTION=n
2022-04-15 14:49:55 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: remove pte entry from the page table
2022-02-04 09:25:04 -08:00
debug.c
mm: unexport page_init_poison
2022-03-24 19:06:45 -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
remove inode_congested()
2022-03-22 15:57:01 -07:00
failslab.c
…
filemap.c
tmpfs: fix regressions from wider use of ZERO_PAGE
2022-04-15 14:49:54 -07:00
folio-compat.c
mm/rmap: Convert rmap_walk() to take a folio
2022-03-21 13:01:35 -04:00
frontswap.c
frontswap: remove support for multiple ops
2022-01-22 08:33:38 +02:00
gup_test.c
selftests/vm: gup_test: test faulting in kernel, and verify pinnable pages
2021-05-05 11:27:26 -07:00
gup_test.h
selftests/vm: gup_test: fix test flag
2021-05-05 11:27:26 -07:00
gup.c
mm/munlock: add lru_add_drain() to fix memcg_stat_test
2022-04-01 11:46:09 -07:00
highmem.c
highmem: fix checks in __kmap_local_sched_{in,out}
2022-04-08 14:20:36 -10:00
hmm.c
mm/hmm.c: remove unneeded local variable ret
2022-03-22 15:57:12 -07:00
huge_memory.c
mm/huge_memory: Avoid calling pmd_page() on a non-leaf PMD
2022-04-07 09:43:41 -04:00
hugetlb_cgroup.c
hugetlb: add hugetlb.*.numa_stat file
2022-01-15 16:30:29 +02:00
hugetlb_vmemmap.c
mm: hugetlb: replace hugetlb_free_vmemmap_enabled with a static_key
2022-03-22 15:57:08 -07:00
hugetlb_vmemmap.h
mm: hugetlb: introduce nr_free_vmemmap_pages in the struct hstate
2021-06-30 20:47:25 -07:00
hugetlb.c
mm/hwpoison: fix race between hugetlb free/demotion and memory_failure_hugetlb()
2022-04-21 20:01:09 -07:00
hwpoison-inject.c
mm/hwpoison: avoid the impact of hwpoison_filter() return value on mce handler
2022-03-22 15:57:07 -07:00
init-mm.c
kernel/fork: Initialize mm's PASID
2022-02-14 19:51:47 +01:00
internal.h
mm/munlock: protect the per-CPU pagevec by a local_lock_t
2022-04-01 11:46:09 -07:00
interval_tree.c
mm/interval_tree: add comments to improve code readability
2021-04-30 11:20:38 -07:00
io-mapping.c
mm: add a io_mapping_map_user helper
2021-04-30 11:20:39 -07:00
ioremap.c
mm: move ioremap_page_range to vmalloc.c
2021-09-08 11:50:24 -07:00
Kconfig
mm: generalize ARCH_HAS_FILTER_PGPROT
2022-03-24 19:06:51 -07:00
Kconfig.debug
mm: page table check
2022-01-15 16:30:28 +02:00
khugepaged.c
mm/khugepaged: remove reuse_swap_page() usage
2022-03-24 19:06:51 -07:00
kmemleak.c
mm: kmemleak: take a full lowmem check in kmemleak_*_phys()
2022-04-15 14:49:56 -07:00
ksm.c
Folio changes for 5.18
2022-03-22 17:03:12 -07:00
list_lru.c
mm/list_lru.c: revert "mm/list_lru: optimize memcg_reparent_list_lru_node()"
2022-04-08 14:20:36 -10:00
maccess.c
asm-generic updates for 5.18
2022-03-23 18:03:08 -07:00
madvise.c
Revert "mm: madvise: skip unmapped vma holes passed to process_madvise"
2022-04-01 11:46:09 -07:00
Makefile
mm: move the migrate_vma_* device migration code into its own file
2022-03-03 12:47:33 -05:00
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
memblock: test suite and a small cleanup
2022-03-27 13:36:06 -07:00
memcontrol.c
memcg: sync flush only if periodic flush is delayed
2022-04-21 20:01:09 -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
Folio changes for 5.18
2022-03-22 17:03:12 -07:00
memory-failure.c
mm/memory-failure.c: skip huge_zero_page in memory_failure()
2022-04-21 20:01:09 -07:00
memory.c
mm,hwpoison: unmap poisoned page before invalidation
2022-04-01 11:46:09 -07:00
mempolicy.c
Merge branch 'akpm' (patches from Andrew)
2022-04-08 14:31:41 -10:00
mempool.c
mm: remove spurious blkdev.h includes
2021-10-18 06:17:01 -06:00
memremap.c
mm: delete __ClearPageWaiters()
2022-03-24 19:06:45 -07:00
memtest.c
…
migrate_device.c
mm/migrate: Convert remove_migration_ptes() to folios
2022-03-21 13:01:35 -04:00
migrate.c
mm: migrate: use thp_order instead of HPAGE_PMD_ORDER for new page allocation.
2022-04-08 14:20:36 -10:00
mincore.c
…
mlock.c
mm/munlock: protect the per-CPU pagevec by a local_lock_t
2022-04-01 11:46:09 -07:00
mm_init.c
include/linux/page-flags-layout.h: cleanups
2021-04-30 11:20:42 -07:00
mmap_lock.c
mm: mmap_lock: fix disabling preemption directly
2021-07-23 17:43:28 -07:00
mmap.c
Folio changes for 5.18
2022-03-22 17:03:12 -07:00
mmu_gather.c
mm: move tlb_flush_pending inline helpers to mm_inline.h
2022-01-15 16:30:27 +02:00
mmu_notifier.c
…
mmzone.c
Folio changes for 5.18
2022-03-22 17:03:12 -07:00
mprotect.c
memory tiering: skip to scan fast memory
2022-03-22 15:57:09 -07:00
mremap.c
mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0)
2022-04-08 14:20:36 -10:00
msync.c
…
nommu.c
Merge branch 'akpm' (patches from Andrew)
2021-11-06 14:08:17 -07:00
oom_kill.c
Folio changes for 5.18
2022-03-22 17:03:12 -07:00
page_alloc.c
mm, page_alloc: fix build_zonerefs_node()
2022-04-15 14:49:55 -07:00
page_counter.c
mm/page_counter: remove an incorrect call to propagate_protected_usage()
2022-01-15 16:30:27 +02:00
page_ext.c
mm: make some vars and functions static or __init
2022-01-15 16:30:31 +02:00
page_idle.c
mm/rmap: Constify the rmap_walk_control argument
2022-03-21 13:01:35 -04:00
page_io.c
mm: fix unexpected zeroed page mapping with zram swap
2022-04-15 14:49:55 -07:00
page_isolation.c
Revert "mm/page_isolation: unset migratetype directly for non Buddy page"
2022-02-04 09:25:04 -08:00
page_owner.c
mm/page_owner.c: record tgid
2022-03-24 19:06:44 -07:00
page_poison.c
…
page_reporting.c
mm/page_reporting: allow driver to specify reporting order
2021-06-29 10:53:47 -07:00
page_reporting.h
mm/page_reporting: export reporting order as module parameter
2021-06-29 10:53:47 -07:00
page_table_check.c
mm/page_table_check.c: use strtobool for param parsing
2022-03-22 15:57:11 -07:00
page_vma_mapped.c
mm/rmap: Fix handling of hugetlbfs pages in page_vma_mapped_walk
2022-04-07 10:11:20 -04:00
page-writeback.c
mm: warn on deleting redirtied only if accounted
2022-03-24 19:06:51 -07:00
pagewalk.c
mm: pagewalk: fix walk for hugepage tables
2021-06-29 10:53:49 -07:00
percpu-internal.h
mm: memcg/percpu: account extra objcg space to memory cgroups
2022-01-15 16:30:31 +02:00
percpu-km.c
percpu: flush tlb in pcpu_reclaim_populated()
2021-07-04 18:30:17 +00:00
percpu-stats.c
mm: use vmalloc_array and vcalloc for array allocations
2022-03-08 09:30:46 -05:00
percpu-vm.c
percpu: flush tlb in pcpu_reclaim_populated()
2021-07-04 18:30:17 +00:00
percpu.c
bitmap patches for 5.17-rc1
2022-01-23 06:20:44 +02:00
pgalloc-track.h
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
pgtable-generic.c
mm: move tlb_flush_pending inline helpers to mm_inline.h
2022-01-15 16:30:27 +02:00
process_vm_access.c
mm/process_vm_access.c: remove duplicate include
2021-05-05 11:27:27 -07:00
ptdump.c
mm: sparsemem: use page table lock to protect kernel pmd operations
2022-03-22 15:57:08 -07:00
readahead.c
readahead: Update comments
2022-04-01 14:40:42 -04:00
rmap.c
mm/munlock: protect the per-CPU pagevec by a local_lock_t
2022-04-01 11:46:09 -07:00
rodata_test.c
…
secretmem.c
mm/secretmem: fix panic when growing a memfd_secret
2022-04-15 14:49:54 -07:00
shmem.c
tmpfs: fix regressions from wider use of ZERO_PAGE
2022-04-15 14:49:54 -07:00
shuffle.c
…
shuffle.h
mm/shuffle: fix section mismatch warning
2021-05-22 15:09:07 -10:00
slab_common.c
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-15 14:49:55 -07:00
slab.c
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-15 14:49:55 -07:00
slab.h
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-15 14:49:55 -07:00
slob.c
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-15 14:49:55 -07:00
slub.c
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-15 14:49:55 -07:00
sparse-vmemmap.c
mm: sparsemem: move vmemmap related to HugeTLB to CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
2022-03-22 15:57:08 -07:00
sparse.c
mm/sparse: make mminit_validate_memmodel_limits() static
2022-03-22 15:57:05 -07:00
swap_cgroup.c
mm: use vmalloc_array and vcalloc for array allocations
2022-03-08 09:30:46 -05:00
swap_slots.c
treewide: Add missing includes masked by cgroup -> bpf dependency
2021-12-03 10:58:13 -08:00
swap_state.c
Filesystem folio changes for 5.18
2022-03-22 18:26:56 -07:00
swap.c
mm/munlock: protect the per-CPU pagevec by a local_lock_t
2022-04-01 11:46:09 -07:00
swapfile.c
mm/swapfile: remove stale reuse_swap_page()
2022-03-24 19:06:51 -07:00
truncate.c
Filesystem folio changes for 5.18
2022-03-22 18:26:56 -07:00
usercopy.c
Merge branch 'akpm' (patches from Andrew)
2022-03-22 16:11:53 -07:00
userfaultfd.c
userfaultfd: mark uffd_wp regardless of VM_WRITE flag
2022-04-21 20:01:09 -07:00
util.c
ARM:
2022-03-24 11:58:57 -07:00
vmacache.c
…
vmalloc.c
vmalloc: replace VM_NO_HUGE_VMAP with VM_ALLOW_HUGE_VMAP
2022-04-19 12:08:57 -07:00
vmpressure.c
mm/vmpressure: fix data-race with memcg->socket_pressure
2021-11-06 13:30:40 -07:00
vmscan.c
Folio changes for 5.18
2022-03-22 17:03:12 -07:00
vmstat.c
mm: only re-generate demotion targets when a numa node changes its N_CPU state
2022-03-22 15:57:11 -07:00
workingset.c
memcg: sync flush only if periodic flush is delayed
2022-04-21 20:01:09 -07:00
z3fold.c
mm/z3fold: add kerneldoc fields for z3fold_pool
2021-07-01 11:06:03 -07:00
zbud.c
mm/zbud: add kerneldoc fields for zbud_pool
2021-07-01 11:06:03 -07:00
zpool.c
zpool: remove the list of pools_head
2022-01-15 16:30:31 +02:00
zsmalloc.c
zsmalloc: replace get_cpu_var with local_lock
2022-01-22 08:33:37 +02:00
zswap.c
mm/zswap.c: allow handling just same-value filled pages
2022-03-22 15:57:11 -07:00