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Muchun Song e36b476a82 mm: hugetlb: fix missing cache flush in copy_huge_page_from_user() 
commit e763243cc6cb1fcc720ec58cfd6e7c35ae90a479 upstream.

userfaultfd calls copy_huge_page_from_user() which does not do any cache
flushing for the target page.  Then the target page will be mapped to
the user space with a different address (user address), which might have
an alias issue with the kernel address used to copy the data from the
user to.

Fix this issue by flushing dcache in copy_huge_page_from_user().

Link: https://lkml.kernel.org/r/20220210123058.79206-4-songmuchun@bytedance.com
Fixes: fa4d75c1de13 ("userfaultfd: hugetlbfs: add copy_huge_page_from_user for hugetlb userfaultfd support")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Fam Zheng <fam.zheng@bytedance.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Lars Persson <lars.persson@axis.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-05-15 20:18:52 +02:00
..
damon
mm/damon/dbgfs: fix 'struct pid' leaks in 'dbgfs_target_ids_write()'
2022-01-05 12:42:39 +01:00
kasan
kasan: prevent cpu_quarantine corruption when CPU offline and cache shrink occur at same time
2022-05-09 09:14:41 +02:00
kfence
mm: kfence: fix objcgs vector allocation
2022-05-01 17:22:28 +02:00
backing-dev.c
mm: bdi: initialize bdi_min_ratio when bdi is unregistered
2021-12-14 10:57:11 +01:00
balloon_compaction.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
bootmem_info.c
mm/bootmem_info.c: mark __init on register_page_bootmem_info_section
2021-09-03 09:58:14 -07:00
cleancache.c
…
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: use proper type for cma_[alloc|release]
2021-05-05 11:27:24 -07:00
cma.h
mm: cma: support sysfs
2021-05-05 11:27:24 -07:00
compaction.c
Merge branch 'akpm' (patches from Andrew)
2021-09-08 12:55:35 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: remove pte entry from the page table
2022-02-08 18:34:05 +01:00
debug.c
mm/debug: sync up latest migrate_reason to migrate_reason_names
2021-09-24 16:13:35 -07:00
dmapool.c
mm/dmapool: use DEVICE_ATTR_RO macro
2021-06-29 10:53:52 -07:00
early_ioremap.c
mm/early_ioremap.c: remove redundant early_ioremap_shutdown()
2021-09-08 11:50:24 -07:00
fadvise.c
…
failslab.c
…
filemap.c
iov_iter: Turn iov_iter_fault_in_readable into fault_in_iov_iter_readable
2022-05-01 17:22:28 +02:00
frontswap.c
mm/mempool: minor coding style tweaks
2021-05-05 11:27:27 -07:00
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: gup: make fault_in_safe_writeable() use fixup_user_fault()
2022-05-01 17:22:34 +02:00
highmem.c
highmem: fix checks in __kmap_local_sched_{in,out}
2022-04-13 20:59:21 +02:00
hmm.c
mm/hmm.c: allow VM_MIXEDMAP to work with hmm_range_fault
2022-01-27 11:05:43 +01:00
huge_memory.c
mm: filemap: check if THP has hwpoisoned subpage for PMD page fault
2021-10-28 17:18:55 -07:00
hugetlb_cgroup.c
hugetlb: make free_huge_page irq safe
2021-05-05 11:27:22 -07:00
hugetlb_vmemmap.c
mm: hugetlb: introduce CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON
2021-06-30 20:47:26 -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
hugetlbfs: flush TLBs correctly after huge_pmd_unshare
2021-11-25 09:49:07 +01:00
hwpoison-inject.c
mm: hwpoison: don't drop slab caches for offlining non-LRU page
2021-09-03 09:58:15 -07:00
init-mm.c
mm: add setup_initial_init_mm() helper
2021-07-08 11:48:21 -07:00
internal.h
mm/numa: automatically generate node migration order
2021-09-03 09:58:16 -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
kmap_local: don't assume kmap PTEs are linear arrays in memory
2021-11-25 09:48:43 +01:00
Kconfig.debug
mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO
2020-12-15 12:13:46 -08:00
khugepaged.c
mm: khugepaged: skip huge page collapse for special files
2021-10-28 17:18:55 -07:00
kmemleak.c
mm: kmemleak: take a full lowmem check in kmemleak_*_phys()
2022-04-20 09:34:18 +02:00
ksm.c
mm/ksm: remove old GCC 4.9+ check
2021-09-13 10:18:28 -07:00
list_lru.c
mm: vmscan: consolidate shrinker_maps handling code
2021-05-05 11:27:23 -07:00
maccess.c
ARM: 9115/1: mm/maccess: fix unaligned copy_{from,to}_kernel_nofault
2021-08-20 11:39:25 +01:00
madvise.c
Revert "mm: madvise: skip unmapped vma holes passed to process_madvise"
2022-04-08 14:22:56 +02:00
Makefile
mm: introduce Data Access MONitor (DAMON)
2021-09-08 11:50:24 -07:00
mapping_dirty_helpers.c
mm/mapping_dirty_helpers: remove double Note in kerneldoc
2021-07-01 11:06:02 -07:00
memblock.c
memblock: use kfree() to release kmalloced memblock regions
2022-03-02 11:48:10 +01:00
memcontrol.c
memcg: sync flush only if periodic flush is delayed
2022-04-27 14:38:57 +02:00
memfd.c
memfd: fix F_SEAL_WRITE after shmem huge page allocated
2022-03-08 19:12:48 +01:00
memory_hotplug.c
Merge branch 'akpm' (patches from Andrew)
2021-09-08 12:55:35 -07:00
memory-failure.c
mm/memory-failure.c: skip huge_zero_page in memory_failure()
2022-04-27 14:38:57 +02:00
memory.c
mm: hugetlb: fix missing cache flush in copy_huge_page_from_user()
2022-05-15 20:18:52 +02:00
mempolicy.c
mm/mempolicy: fix mpol_new leak in shared_policy_replace
2022-04-13 20:59:22 +02:00
mempool.c
kasan: use separate (un)poison implementation for integrated init
2021-06-04 19:32:21 +01:00
memremap.c
mm/memory_hotplug: remove nid parameter from arch_remove_memory()
2021-09-08 11:50:23 -07:00
memtest.c
…
migrate.c
mm: fix missing cache flush for all tail pages of compound page
2022-05-15 20:18:52 +02:00
mincore.c
inode: make init and permission helpers idmapped mount aware
2021-01-24 14:27:16 +01:00
mlock.c
mm/mlock: fix two bugs in user_shm_lock()
2022-04-08 14:22:52 +02:00
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
mm, hugetlb: allow for "high" userspace addresses
2022-04-27 14:38:57 +02:00
mmu_gather.c
mm: eliminate "expecting prototype" kernel-doc warnings
2021-04-16 16:10:36 -07:00
mmu_notifier.c
mm/mmu_notifier.c: fix race in mmu_interval_notifier_remove()
2022-04-27 14:38:58 +02:00
mmzone.c
mm/lru: replace pgdat lru_lock with lruvec lock
2020-12-15 14:48:04 -08:00
mprotect.c
mm: don't try to NUMA-migrate COW pages that have other uses
2022-02-23 12:03:03 +01:00
mremap.c
mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0)
2022-04-13 20:59:22 +02:00
msync.c
mm/msync: exit early when the flags is an MS_ASYNC and start < vm_start
2021-04-30 11:20:37 -07:00
nommu.c
Merge tag 'denywrite-for-5.15' of git://github.com/davidhildenbrand/linux
2021-09-04 11:35:47 -07:00
oom_kill.c
oom_kill.c: futex: delay the OOM reaper to allow time for proper futex cleanup
2022-04-27 14:38:58 +02:00
page_alloc.c
mm: page_alloc: fix building error on -Werror=array-compare
2022-04-27 14:38:50 +02:00
page_counter.c
mm: page_counter: mitigate consequences of a page_counter underflow
2021-04-30 11:20:38 -07:00
page_ext.c
mm/migrate: add CPU hotplug to demotion #ifdef
2021-10-18 20:22:02 -10:00
page_idle.c
mm/idle_page_tracking: make PG_idle reusable
2021-09-08 11:50:24 -07:00
page_io.c
mm: fix unexpected zeroed page mapping with zram swap
2022-04-20 09:34:18 +02:00
page_isolation.c
Merge branch 'akpm' (patches from Andrew)
2021-09-08 12:55:35 -07:00
page_owner.c
mm: remove pfn_valid_within() and CONFIG_HOLES_IN_ZONE
2021-09-08 11:50:22 -07:00
page_poison.c
mm: page_poison: print page info when corruption is caught
2021-04-30 11:20:36 -07:00
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_vma_mapped.c
mm: device exclusive memory access
2021-07-01 11:06:03 -07:00
page-writeback.c
Merge branch 'akpm' (patches from Andrew)
2021-09-03 10:08:28 -07:00
pagewalk.c
mm: pagewalk: fix walk for hugepage tables
2021-06-29 10:53:49 -07:00
percpu-internal.h
Merge branch 'for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu
2021-07-01 17:17:24 -07:00
percpu-km.c
percpu: flush tlb in pcpu_reclaim_populated()
2021-07-04 18:30:17 +00:00
percpu-stats.c
percpu: rework memcg accounting
2021-06-05 20:43:15 +00:00
percpu-vm.c
percpu: flush tlb in pcpu_reclaim_populated()
2021-07-04 18:30:17 +00:00
percpu.c
Merge branch 'akpm' (patches from Andrew)
2021-09-08 12:55:35 -07:00
pgalloc-track.h
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
pgtable-generic.c
mm/thp: fix __split_huge_pmd_locked() on shmem migration entry
2021-06-16 09:24:42 -07:00
process_vm_access.c
mm/process_vm_access.c: remove duplicate include
2021-05-05 11:27:27 -07:00
ptdump.c
mm: ptdump: fix build failure
2021-04-16 16:10:37 -07:00
readahead.c
mm: Protect operations adding pages to page cache with invalidate_lock
2021-07-13 13:14:27 +02:00
rmap.c
mm: fix race between MADV_FREE reclaim and blkdev direct IO read
2022-04-13 20:59:14 +02:00
rodata_test.c
…
secretmem.c
mm/secretmem: fix panic when growing a memfd_secret
2022-04-20 09:34:18 +02:00
shmem.c
shmem: fix a race between shmem_unused_huge_shrink and shmem_evict_inode
2022-01-27 11:03:01 +01:00
shuffle.c
mm: eliminate "expecting prototype" kernel-doc warnings
2021-04-16 16:10:36 -07:00
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
2022-04-27 14:38:51 +02:00
slab.c
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-27 14:38:51 +02:00
slab.h
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-27 14:38:51 +02:00
slob.c
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-27 14:38:51 +02:00
slub.c
mm, kfence: support kmem_dump_obj() for KFENCE objects
2022-04-27 14:38:51 +02:00
sparse-vmemmap.c
mm: sparsemem: split the huge PMD mapping of vmemmap pages
2021-06-30 20:47:26 -07:00
sparse.c
mm: introduce memmap_alloc() to unify memory map allocation
2021-09-03 09:58:15 -07:00
swap_cgroup.c
…
swap_slots.c
mm: Replace deprecated CPU-hotplug functions.
2021-08-28 01:46:17 +02:00
swap_state.c
mm: swap: get rid of livelock in swapin readahead
2022-03-23 09:16:41 +01:00
swap.c
mm: fs: invalidate bh_lrus for only cold path
2021-09-24 16:13:35 -07:00
swapfile.c
mm, memcg: inline swap-related functions to improve disabled memcg config
2021-09-03 09:58:12 -07:00
truncate.c
Merge branch 'akpm' (patches from Andrew)
2021-09-03 10:08:28 -07:00
usercopy.c
mm/usercopy: return 1 from hardened_usercopy __setup() handler
2022-04-08 14:24:14 +02:00
userfaultfd.c
userfaultfd: change mmap_changing to atomic
2021-09-03 09:58:16 -07:00
util.c
mm: Consider __GFP_NOWARN flag for oversized kvmalloc() calls
2022-03-08 19:12:44 +01:00
vmacache.c
…
vmalloc.c
mm: defer kmemleak object creation of module_alloc()
2022-03-08 19:12:38 +01:00
vmpressure.c
mm/vmpressure: replace vmpressure_to_css() with vmpressure_to_memcg()
2021-09-03 09:58:17 -07:00
vmscan.c
mm,vmscan: fix divide by zero in get_scan_count
2021-09-08 18:45:53 -07:00
vmstat.c
mm/vmstat: protect per cpu variables with preempt disable on RT
2021-09-08 15:32:34 -07:00
workingset.c
memcg: sync flush only if periodic flush is delayed
2022-04-27 14:38:57 +02:00
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
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
zsmalloc.c
mm/zsmalloc.c: close race window between zs_pool_dec_isolated() and zs_unregister_migration()
2021-11-18 19:17:10 +01:00
zswap.c
mm/zswap.c: fix two bugs in zswap_writeback_entry()
2021-06-30 20:47:31 -07:00