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
Kconfig	mm,memory_hotplug: allocate memmap from the added memory range	2021-05-05 11:27:26 -07:00
Kconfig.debug	…
Makefile	mm,memory_hotplug: add kernel boot option to enable memmap_on_memory	2021-05-05 11:27:27 -07:00
backing-dev.c	…
balloon_compaction.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
cleancache.c	…
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
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
compaction.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
debug.c	…
debug_page_ref.c	…
debug_vm_pgtable.c	mm: HUGE_VMAP arch support cleanup	2021-04-30 11:20:40 -07:00
dmapool.c	mm/dmapool: switch from strlcpy to strscpy	2021-04-30 11:20:39 -07:00
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.c	Revert "mm/gup: check page posion status for coredump."	2021-05-22 15:09:07 -10:00
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
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.c	mm/hugetlb: fix cow where page writtable in child	2021-05-14 19:41:32 -07:00
hugetlb_cgroup.c	hugetlb: make free_huge_page irq safe	2021-05-05 11:27:22 -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	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/ioremap: fix iomap_max_page_shift	2021-05-14 19:41:32 -07:00
khugepaged.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
kmemleak.c	mm/kmemleak.c: fix a typo	2021-04-30 11:20:36 -07:00
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
mapping_dirty_helpers.c	…
memblock.c	…
memcontrol.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
memfd.c	…
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
memory_hotplug.c	mm/mempool: minor coding style tweaks	2021-05-05 11:27:27 -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	mm/memremap.c: fix improper SPDX comment style	2021-04-30 11:20:37 -07:00
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.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
mmap_lock.c	…
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	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	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-writeback.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	mm: page_counter: mitigate consequences of a page_counter underflow	2021-04-30 11:20:38 -07:00
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	mm: page_poison: print page info when corruption is caught	2021-04-30 11:20:36 -07:00
page_reporting.c	…
page_reporting.h	…
page_vma_mapped.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	mm/vmalloc: remove unmap_kernel_range	2021-04-30 11:20:40 -07:00
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.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
slab.h	kasan, mm: integrate slab init_on_alloc with HW_TAGS	2021-04-30 11:20:41 -07:00
slab_common.c	mm, slub: move slub_debug static key enabling outside slab_mutex	2021-05-14 19:41:32 -07:00
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.c	mm: fix some typos and code style problems	2021-05-07 00:26:33 -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
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