linux-stable/mm
Shijie Luo 5ed0bc2d3e mm: mempolicy: fix potential pte_unmap_unlock pte error
[ Upstream commit 3f08842098 ]

When flags in queue_pages_pte_range don't have MPOL_MF_MOVE or
MPOL_MF_MOVE_ALL bits, code breaks and passing origin pte - 1 to
pte_unmap_unlock seems like not a good idea.

queue_pages_pte_range can run in MPOL_MF_MOVE_ALL mode which doesn't
migrate misplaced pages but returns with EIO when encountering such a
page.  Since commit a7f40cfe3b ("mm: mempolicy: make mbind() return
-EIO when MPOL_MF_STRICT is specified") and early break on the first pte
in the range results in pte_unmap_unlock on an underflow pte.  This can
lead to lockups later on when somebody tries to lock the pte resp.
page_table_lock again..

Fixes: a7f40cfe3b ("mm: mempolicy: make mbind() return -EIO when MPOL_MF_STRICT is specified")
Signed-off-by: Shijie Luo <luoshijie1@huawei.com>
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Feilong Lin <linfeilong@huawei.com>
Cc: Shijie Luo <luoshijie1@huawei.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20201019074853.50856-1-luoshijie1@huawei.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-11-18 18:26:23 +01:00
..
kasan kasan: avoid -Wmaybe-uninitialized warning 2019-05-08 07:19:07 +02:00
backing-dev.c writeback: synchronize sync(2) against cgroup writeback membership switches 2019-05-21 18:49:01 +02:00
balloon_compaction.c
bootmem.c mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping 2016-10-11 15:06:33 -07:00
cleancache.c
cma.c mm/cma.c: fail if fixed declaration can't be honored 2019-08-06 18:29:37 +02:00
cma.h
cma_debug.c mm/cma_debug.c: fix the break condition in cma_maxchunk_get() 2019-06-22 08:17:12 +02:00
compaction.c mm, compaction: fix NR_ISOLATED_* stats for pfn based migration 2017-01-12 11:39:32 +01:00
debug.c mm: get rid of vmacache_flush_all() entirely 2018-09-19 22:47:17 +02:00
debug_page_ref.c
dmapool.c
early_ioremap.c mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep 2018-02-25 11:05:49 +01:00
fadvise.c mm/fadvise.c: fix signed overflow UBSAN complaint 2018-09-15 09:42:57 +02:00
failslab.c
filemap.c mm/filemap.c: clear page error before actual read 2020-10-01 20:40:11 +02:00
frame_vector.c mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()' 2018-11-10 07:42:52 -08:00
frontswap.c
gup.c mm: prevent get_user_pages() from overflowing page refcount 2019-06-11 12:22:45 +02:00
highmem.c
huge_memory.c mm: thp: make the THP mapcount atomic against __split_huge_pmd_locked() 2020-06-20 10:24:19 +02:00
hugetlb.c mm/hugetlb: fix a race between hugetlb sysctl handlers 2020-09-12 11:47:38 +02:00
hugetlb_cgroup.c mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup() 2019-11-25 09:51:58 +01:00
hwpoison-inject.c
init-mm.c mm: Add a user_ns owner to mm_struct and fix ptrace permission checks 2017-01-06 10:40:13 +01:00
internal.h vmscan: return NODE_RECLAIM_NOSCAN in node_reclaim() when CONFIG_NUMA is n 2019-12-05 15:35:02 +01:00
interval_tree.c
Kconfig mm: don't allow deferred pages with NEED_PER_CPU_KM 2018-05-22 16:57:57 +02:00
Kconfig.debug PM / Hibernate: allow hibernation with PAGE_POISONING_ZERO 2016-09-13 02:35:27 +02:00
khugepaged.c mm: khugepaged: recalculate min_free_kbytes after memory hotplug as expected by khugepaged 2020-10-14 09:48:17 +02:00
kmemcheck.c
kmemleak-test.c
kmemleak.c mm/kmemleak.c: fix check for softirq context 2019-08-04 09:33:41 +02:00
ksm.c mm/ksm.c: don't WARN if page is still mapped in remove_stable_node() 2019-11-28 18:28:09 +01:00
list_lru.c mm/list_lru.c: fix memory leak in __memcg_init_list_lru_node 2019-06-22 08:17:18 +02:00
maccess.c uaccess: Add non-pagefault user-space write function 2020-09-12 11:47:35 +02:00
madvise.c mm: madvise(MADV_DODUMP): allow hugetlbfs pages 2018-10-10 08:53:20 +02:00
Makefile Disable the __builtin_return_address() warning globally after all 2016-10-12 10:23:41 -07:00
memblock.c mm/memblock.c: reversed logic in memblock_discard() 2017-08-30 10:21:47 +02:00
memcontrol.c mm/memcg: fix refcount error while moving and swapping 2020-07-31 16:44:05 +02:00
memory-failure.c mm: hwpoison: fix thp split handing in soft_offline_in_use_page() 2019-03-23 13:19:49 +01:00
memory.c mm: stop leaking PageTables 2019-02-20 10:18:34 +01:00
memory_hotplug.c mm: Avoid calling build_all_zonelists_init under hotplug context 2020-08-21 11:02:11 +02:00
mempolicy.c mm: mempolicy: fix potential pte_unmap_unlock pte error 2020-11-18 18:26:23 +01:00
mempool.c Revert "mm, mempool: only set __GFP_NOMEMALLOC if there are free elements" 2016-07-28 16:07:41 -07:00
memtest.c
migrate.c hugetlbfs: fix races and page leaks during migration 2019-03-13 14:04:54 -07:00
mincore.c mm/mincore.c: make mincore() more conservative 2019-05-21 18:48:58 +02:00
mlock.c mm/mlock.c: change count_mm_mlocked_page_nr return type 2019-07-10 09:55:43 +02:00
mm_init.c
mmap.c mm/mmap.c: initialize align_offset explicitly for vm_unmapped_area 2020-10-01 20:40:11 +02:00
mmu_context.c
mmu_notifier.c mm/mmu_notifier: use hlist_add_head_rcu() 2019-08-04 09:33:42 +02:00
mmzone.c
mprotect.c x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings 2018-08-15 18:14:45 +02:00
mremap.c mm: Fix mremap not considering huge pmd devmap 2020-06-11 09:22:20 +02:00
msync.c
nobootmem.c mm: discard memblock data later 2017-08-24 17:12:19 -07:00
nommu.c x86/mm: split vmalloc_sync_all() 2020-04-02 17:20:26 +02:00
oom_kill.c oom, oom_reaper: do not enqueue same task twice 2019-02-12 19:45:02 +01:00
page-writeback.c mm/page-writeback.c: avoid potential division by zero in wb_min_max_ratio() 2020-01-23 08:19:40 +01:00
page_alloc.c mm: khugepaged: recalculate min_free_kbytes after memory hotplug as expected by khugepaged 2020-10-14 09:48:17 +02:00
page_counter.c
page_ext.c mm/page_ext.c: fix an imbalance with kmemleak 2019-04-05 22:29:06 +02:00
page_idle.c mm/page_idle.c: fix oops because end_pfn is larger than max_pfn 2019-07-10 09:55:38 +02:00
page_io.c mm/page_io.c: replace some BUG_ON()s with VM_BUG_ON_PAGE() 2016-10-07 18:46:29 -07:00
page_isolation.c mm/page_isolation: fix typo: "paes" -> "pages" 2016-10-07 18:46:29 -07:00
page_owner.c mm/page_owner: don't define fields on struct page_ext by hard-coding 2016-10-07 18:46:27 -07:00
page_poison.c
pagewalk.c mm: pagewalk: fix termination condition in walk_pte_range() 2020-10-01 20:40:06 +02:00
percpu-km.c
percpu-vm.c
percpu.c percpu: stop printing kernel addresses 2019-04-27 09:34:47 +02:00
pgtable-generic.c
process_vm_access.c mm: remove write/force parameters from __get_user_pages_unlocked() 2016-10-18 14:13:37 -07:00
quicklist.c
readahead.c mm: silently skip readahead for DAX inodes 2016-08-26 17:39:35 -07:00
rmap.c mm: migration: fix migration of huge PMD shared pages 2018-11-21 09:26:03 +01:00
shmem.c shmem: fix possible deadlocks on shmlock_user_lock 2020-05-20 08:15:33 +02:00
slab.c mm/slab.c: fix an infinite loop in leaks_show() 2019-06-22 08:17:13 +02:00
slab.h slub: move synchronize_sched out of slab_mutex on shrink 2017-03-22 12:43:38 +01:00
slab_common.c mm/slab: use memzero_explicit() in kzfree() 2020-06-30 15:38:44 -04:00
slob.c slub: move synchronize_sched out of slab_mutex on shrink 2017-03-22 12:43:38 +01:00
slub.c mm: slub: fix conversion of freelist_corrupted() 2020-09-12 11:47:37 +02:00
sparse-vmemmap.c treewide: replace obsolete _refok by __ref 2016-08-02 17:31:41 -04:00
sparse.c mm/memory_hotplug: set magic number to page->freelist instead of page->lru.next 2017-10-21 17:21:36 +02:00
swap.c thp: reduce usage of huge zero page's atomic counter 2016-10-07 18:46:28 -07:00
swap_cgroup.c mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff() 2017-07-05 14:40:17 +02:00
swap_state.c mm: fix swap cache node allocation mask 2020-07-09 09:35:54 +02:00
swapfile.c x86/speculation/l1tf: Limit swap file size to MAX_PA/2 2018-08-15 18:14:45 +02:00
truncate.c mm: cleancache: fix corruption on missed inode invalidation 2018-12-08 13:05:09 +01:00
usercopy.c usercopy: Avoid HIGHMEM pfn warning 2019-10-17 13:42:06 -07:00
userfaultfd.c
util.c mm: page_mapped: don't assume compound page is huge or THP 2019-01-16 22:12:32 +01:00
vmacache.c mm: get rid of vmacache_flush_all() entirely 2018-09-19 22:47:17 +02:00
vmalloc.c mm/vmalloc.c: don't dereference possible NULL pointer in __vunmap() 2020-06-03 08:16:47 +02:00
vmpressure.c mm: vmpressure: fix sending wrong events on underflow 2017-03-12 06:41:43 +01:00
vmscan.c mm: remove seemingly spurious reclaimability check from laptop_mode gating 2018-09-19 22:47:12 +02:00
vmstat.c mm, vmstat: hide /proc/pagetypeinfo from normal users 2019-11-12 19:15:43 +01:00
workingset.c mm: workingset: fix premature shadow node shrinking with cgroups 2017-04-08 09:30:36 +02:00
z3fold.c
zbud.c
zpool.c
zsmalloc.c mm/zsmalloc.c: fix the migrated zspage statistics. 2020-01-12 11:24:13 +01:00
zswap.c zswap: re-check zswap_is_full() after do zswap_shrink() 2018-09-05 09:20:02 +02:00