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linux/mm
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Mike Kravetz e32905e573 userfaultfd: hugetlbfs: fix new flag usage in error path 
In commit d6995da311 ("hugetlb: use page.private for hugetlb specific
page flags") the use of PagePrivate to indicate a reservation count
should be restored at free time was changed to the hugetlb specific flag
HPageRestoreReserve.  Changes to a userfaultfd error path as well as a
VM_BUG_ON() in remove_inode_hugepages() were overlooked.

Users could see incorrect hugetlb reserve counts if they experience an
error with a UFFDIO_COPY operation.  Specifically, this would be the
result of an unlikely copy_huge_page_from_user error.  There is not an
increased chance of hitting the VM_BUG_ON.

Link: https://lkml.kernel.org/r/20210521233952.236434-1-mike.kravetz@oracle.com
Fixes: d6995da311 ("hugetlb: use page.private for hugetlb specific page flags")
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Mina Almasry <almasry.mina@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Mina Almasry <almasrymina@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-22 15:09:07 -10:00
..
kasan
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
kfence
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
backing-dev.c
…
balloon_compaction.c
mm: fix typos in comments
2021-05-07 00:26:35 -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
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
…
debug.c
…
dmapool.c
…
early_ioremap.c
…
fadvise.c
…
failslab.c
…
filemap.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
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
Revert "mm/gup: check page posion status for coredump."
2021-05-22 15:09:07 -10:00
highmem.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
hmm.c
…
huge_memory.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
hugetlb_cgroup.c
hugetlb: make free_huge_page irq safe
2021-05-05 11:27:22 -07:00
hugetlb.c
mm/hugetlb: fix cow where page writtable in child
2021-05-14 19:41:32 -07:00
hwpoison-inject.c
…
init-mm.c
…
internal.h
Revert "mm/gup: check page posion status for coredump."
2021-05-22 15:09:07 -10:00
interval_tree.c
…
io-mapping.c
…
ioremap.c
mm/ioremap: fix iomap_max_page_shift
2021-05-14 19:41:32 -07:00
Kconfig
mm,memory_hotplug: allocate memmap from the added memory range
2021-05-05 11:27:26 -07:00
Kconfig.debug
…
khugepaged.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
kmemleak.c
…
ksm.c
ksm: revert "use GET_KSM_PAGE_NOLOCK to get ksm page in remove_rmap_item_from_tree()"
2021-05-14 19:41:32 -07:00
list_lru.c
mm: vmscan: consolidate shrinker_maps handling code
2021-05-05 11:27:23 -07:00
maccess.c
…
madvise.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
Makefile
mm,memory_hotplug: add kernel boot option to enable memmap_on_memory
2021-05-05 11:27:27 -07:00
mapping_dirty_helpers.c
…
memblock.c
…
memcontrol.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
memfd.c
…
memory_hotplug.c
mm/mempool: minor coding style tweaks
2021-05-05 11:27:27 -07:00
memory-failure.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
memory.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
mempolicy.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
mempool.c
mm/mempool: minor coding style tweaks
2021-05-05 11:27:27 -07:00
memremap.c
…
memtest.c
…
migrate.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
mincore.c
…
mlock.c
mm/mempool: minor coding style tweaks
2021-05-05 11:27:27 -07:00
mm_init.c
include/linux/page-flags-layout.h: cleanups
2021-04-30 11:20:42 -07:00
mmap_lock.c
…
mmap.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
mmu_gather.c
…
mmu_notifier.c
…
mmzone.c
…
mprotect.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
mremap.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
msync.c
…
nommu.c
mm/vmalloc: remove vwrite()
2021-05-07 00:26:34 -07:00
oom_kill.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
page_alloc.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
page_counter.c
…
page_ext.c
…
page_idle.c
…
page_io.c
…
page_isolation.c
…
page_owner.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
page_poison.c
…
page_reporting.c
…
page_reporting.h
…
page_vma_mapped.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
page-writeback.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
pagewalk.c
…
percpu-internal.h
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
percpu-km.c
…
percpu-stats.c
…
percpu-vm.c
…
percpu.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
pgalloc-track.h
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
pgtable-generic.c
…
process_vm_access.c
mm/process_vm_access.c: remove duplicate include
2021-05-05 11:27:27 -07:00
ptdump.c
…
readahead.c
…
rmap.c
mm: fix some typos and code style problems
2021-05-07 00:26:33 -07:00
rodata_test.c
…
shmem.c
userfaultfd: release page in error path to avoid BUG_ON
2021-05-14 19:41:32 -07:00
shuffle.c
…
shuffle.h
mm/shuffle: fix section mismatch warning
2021-05-22 15:09:07 -10:00
slab_common.c
mm, slub: move slub_debug static key enabling outside slab_mutex
2021-05-14 19:41:32 -07:00
slab.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
slab.h
…
slob.c
…
slub.c
kasan: slab: always reset the tag in get_freepointer_safe()
2021-05-22 15:09:07 -10:00
sparse-vmemmap.c
…
sparse.c
mm/mempool: minor coding style tweaks
2021-05-05 11:27:27 -07:00
swap_cgroup.c
…
swap_slots.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
swap_state.c
mm: fix some typos and code style problems
2021-05-07 00:26:33 -07:00
swap.c
mm: fix some typos and code style problems
2021-05-07 00:26:33 -07:00
swapfile.c
mm/mempool: minor coding style tweaks
2021-05-05 11:27:27 -07:00
truncate.c
mm: stop accounting shadow entries
2021-05-05 11:27:19 -07:00
usercopy.c
…
userfaultfd.c
userfaultfd: hugetlbfs: fix new flag usage in error path
2021-05-22 15:09:07 -10:00
util.c
mm/util.c: fix typo
2021-05-05 11:27:25 -07:00
vmacache.c
…
vmalloc.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
vmpressure.c
…
vmscan.c
mm/mempool: minor coding style tweaks
2021-05-05 11:27:27 -07:00
vmstat.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
workingset.c
mm: stop accounting shadow entries
2021-05-05 11:27:19 -07:00
z3fold.c
mm: fix some typos and code style problems
2021-05-07 00:26:33 -07:00
zbud.c
…
zpool.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
zsmalloc.c
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
zswap.c
mm/zswap.c: switch from strlcpy to strscpy
2021-05-05 11:27:27 -07:00