Nadav Amit 556d59293a hugetlbfs: flush TLBs correctly after huge_pmd_unshare ... commit a4a118f2ee upstream. When __unmap_hugepage_range() calls to huge_pmd_unshare() succeed, a TLB flush is missing. This TLB flush must be performed before releasing the i_mmap_rwsem, in order to prevent an unshared PMDs page from being released and reused before the TLB flush took place. Arguably, a comprehensive solution would use mmu_gather interface to batch the TLB flushes and the PMDs page release, however it is not an easy solution: (1) try_to_unmap_one() and try_to_migrate_one() also call huge_pmd_unshare() and they cannot use the mmu_gather interface; and (2) deferring the release of the page reference for the PMDs page until after i_mmap_rwsem is dropeed can confuse huge_pmd_unshare() into thinking PMDs are shared when they are not. Fix __unmap_hugepage_range() by adding the missing TLB flush, and forcing a flush when unshare is successful. Fixes: 24669e5847 ("hugetlb: use mmu_gather instead of a temporary linked list for accumulating pages)" # 3.6 Signed-off-by: Nadav Amit <namit@vmware.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-11-25 09:49:07 +01:00
..
damon	mm/damon/dbgfs: fix missed use of damon_dbgfs_lock	2021-11-25 09:48:43 +01:00
kasan	Merge branch 'akpm' (patches from Andrew)	2021-09-03 10:08:28 -07:00
kfence	kfence: always use static branches to guard kfence_alloc()	2021-11-12 15:05:49 +01:00
Kconfig	kmap_local: don't assume kmap PTEs are linear arrays in memory	2021-11-25 09:48:43 +01:00
Kconfig.debug	…
Makefile	mm: introduce Data Access MONitor (DAMON)	2021-09-08 11:50:24 -07:00
backing-dev.c	Merge branch 'akpm' (patches from Andrew)	2021-09-03 10:08:28 -07:00
balloon_compaction.c	…
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.c	…
cma.h	…
cma_debug.c	…
cma_sysfs.c	…
compaction.c	Merge branch 'akpm' (patches from Andrew)	2021-09-08 12:55:35 -07:00
debug.c	mm/debug: sync up latest migrate_reason to migrate_reason_names	2021-09-24 16:13:35 -07:00
debug_page_ref.c	…
debug_vm_pgtable.c	mm/debug_vm_pgtable: fix corrupted page flag	2021-09-03 09:58:10 -07:00
dmapool.c	…
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	mm/filemap.c: remove bogus VM_BUG_ON	2021-11-18 19:17:16 +01:00
frontswap.c	…
gup.c	Revert "mm/gup: remove try_get_page(), call try_get_compound_head() directly"	2021-09-07 11:03:45 -07:00
gup_test.c	…
gup_test.h	…
highmem.c	kmap_local: don't assume kmap PTEs are linear arrays in memory	2021-11-25 09:48:43 +01:00
hmm.c	mm/hmm: bypass devmap pte when all pfn requested flags are fulfilled	2021-09-08 18:45:52 -07:00
huge_memory.c	mm: filemap: check if THP has hwpoisoned subpage for PMD page fault	2021-10-28 17:18:55 -07:00
hugetlb.c	hugetlbfs: flush TLBs correctly after huge_pmd_unshare	2021-11-25 09:49:07 +01:00
hugetlb_cgroup.c	…
hugetlb_vmemmap.c	…
hugetlb_vmemmap.h	…
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	…
internal.h	mm/numa: automatically generate node migration order	2021-09-03 09:58:16 -07:00
interval_tree.c	…
io-mapping.c	…
ioremap.c	mm: move ioremap_page_range to vmalloc.c	2021-09-08 11:50:24 -07:00
khugepaged.c	mm: khugepaged: skip huge page collapse for special files	2021-10-28 17:18:55 -07:00
kmemleak.c	mm/kmemleak: allow __GFP_NOLOCKDEP passed to kmemleak's gfp	2021-09-08 18:45:53 -07:00
ksm.c	mm/ksm: remove old GCC 4.9+ check	2021-09-13 10:18:28 -07:00
list_lru.c	…
maccess.c	…
madvise.c	Merge branch 'akpm' (patches from Andrew)	2021-09-03 10:08:28 -07:00
mapping_dirty_helpers.c	…
memblock.c	memblock: exclude MEMBLOCK_NOMAP regions from kmemleak	2021-10-21 18:30:49 -10:00
memcontrol.c	memcg: prohibit unconditional exceeding the limit of dying tasks	2021-11-18 19:17:16 +01:00
memfd.c	…
memory-failure.c	mm: filemap: check if THP has hwpoisoned subpage for PMD page fault	2021-10-28 17:18:55 -07:00
memory.c	mm: filemap: check if THP has hwpoisoned subpage for PMD page fault	2021-10-28 17:18:55 -07:00
memory_hotplug.c	Merge branch 'akpm' (patches from Andrew)	2021-09-08 12:55:35 -07:00
mempolicy.c	mm/mempolicy: do not allow illegal MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind()	2021-10-18 20:22:03 -10:00
mempool.c	…
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/migrate: fix CPUHP state to update node demotion order	2021-10-18 20:22:03 -10:00
mincore.c	…
mlock.c	…
mm_init.c	…
mmap.c	Merge tag 'denywrite-for-5.15' of git://github.com/davidhildenbrand/linux	2021-09-04 11:35:47 -07:00
mmap_lock.c	…
mmu_gather.c	…
mmu_notifier.c	…
mmzone.c	…
mprotect.c	…
mremap.c	mm/mremap: fix memory account on do_munmap() failure	2021-09-03 09:58:14 -07:00
msync.c	…
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	mm, oom: do not trigger out_of_memory from the #PF	2021-11-18 19:17:16 +01:00
page-writeback.c	Merge branch 'akpm' (patches from Andrew)	2021-09-03 10:08:28 -07:00
page_alloc.c	mm: filemap: check if THP has hwpoisoned subpage for PMD page fault	2021-10-28 17:18:55 -07:00
page_counter.c	…
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	…
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	…
page_reporting.c	…
page_reporting.h	…
page_vma_mapped.c	…
pagewalk.c	…
percpu-internal.h	…
percpu-km.c	…
percpu-stats.c	…
percpu-vm.c	…
percpu.c	Merge branch 'akpm' (patches from Andrew)	2021-09-08 12:55:35 -07:00
pgalloc-track.h	…
pgtable-generic.c	…
process_vm_access.c	…
ptdump.c	…
readahead.c	…
rmap.c	Merge branch 'akpm' (patches from Andrew)	2021-09-08 12:55:35 -07:00
rodata_test.c	…
secretmem.c	mm/secretmem: avoid letting secretmem_users drop to zero	2021-10-28 17:18:55 -07:00
shmem.c	mm/shmem.c: fix judgment error in shmem_is_huge()	2021-09-24 16:13:34 -07:00
shuffle.c	…
shuffle.h	…
slab.c	mm/migrate: add CPU hotplug to demotion #ifdef	2021-10-18 20:22:02 -10:00
slab.h	mm: kmemleak: slob: respect SLAB_NOLEAKTRACE flag	2021-11-25 09:48:42 +01:00
slab_common.c	mm: slub: move flush_cpu_slab() invocations __free_slab() invocations out of IRQ context	2021-09-04 01:12:23 +02:00
slob.c	…
slub.c	mm, slub: fix incorrect memcg slab count for bulk free	2021-10-18 20:22:03 -10:00
sparse-vmemmap.c	…
sparse.c	mm: introduce memmap_alloc() to unify memory map allocation	2021-09-03 09:58:15 -07:00
swap.c	mm: fs: invalidate bh_lrus for only cold path	2021-09-24 16:13:35 -07:00
swap_cgroup.c	…
swap_slots.c	…
swap_state.c	…
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	…
userfaultfd.c	userfaultfd: change mmap_changing to atomic	2021-09-03 09:58:16 -07:00
util.c	mm: fix uninitialized use in overcommit_policy_handler	2021-09-24 16:13:35 -07:00
vmacache.c	…
vmalloc.c	mm/vmalloc: fix numa spreading for large hash tables	2021-10-28 17:18:55 -07:00
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: flush lruvec stats in the refault	2021-09-23 10:09:13 -07:00
z3fold.c	…
zbud.c	…
zpool.c	…
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	…