Johannes Weiner ddafc88008 mm: filemap: fix mapping->nrpages double accounting in fuse ... commit 3ddf40e8c3 upstream. Commit 22f2ac51b6 ("mm: workingset: fix crash in shadow node shrinker caused by replace_page_cache_page()") switched replace_page_cache() from raw radix tree operations to page_cache_tree_insert() but didn't take into account that the latter function, unlike the raw radix tree op, handles mapping->nrpages. As a result, that counter is bumped for each page replacement rather than balanced out even. The mapping->nrpages counter is used to skip needless radix tree walks when invalidating, truncating, syncing inodes without pages, as well as statistics for userspace. Since the error is positive, we'll do more page cache tree walks than necessary; we won't miss a necessary one. And we'll report more buffer pages to userspace than there are. The error is limited to fuse inodes. Fixes: 22f2ac51b6 ("mm: workingset: fix crash in shadow node shrinker caused by replace_page_cache_page()") Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Miklos Szeredi <miklos@szeredi.hu> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2016-10-28 03:01:34 -04:00
..
kasan
backing-dev.c	block: fix bdi vs gendisk lifetime mismatch	2016-08-20 18:09:24 +02:00
balloon_compaction.c	virtio_balloon: fix race between migration and ballooning	2016-03-03 15:07:18 -08:00
bootmem.c
cleancache.c
cma_debug.c
cma.c
cma.h
compaction.c	mm, compaction: prevent VM_BUG_ON when terminating freeing scanner	2016-08-10 11:49:25 +02:00
debug-pagealloc.c
debug.c
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c	mm: filemap: fix mapping->nrpages double accounting in fuse	2016-10-28 03:01:34 -04:00
frame_vector.c
frontswap.c
gup.c	mm: remove gup_flags FOLL_WRITE games from __get_user_pages()	2016-10-20 10:00:47 +02:00
highmem.c
huge_memory.c	mm/huge_memory: replace VM_NO_THP VM_BUG_ON with actual VMA check	2016-05-04 14:48:49 -07:00
hugetlb_cgroup.c
hugetlb.c	hugetlb: fix nr_pmds accounting with shared page tables	2016-09-07 08:32:35 +02:00
hwpoison-inject.c
init-mm.c
internal.h	mm, sl[au]b: add __GFP_ATOMIC to the GFP reclaim mask	2016-08-10 11:49:25 +02:00
interval_tree.c
Kconfig
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c
ksm.c	mm,ksm: fix endless looping in allocating memory when ksm enable	2016-10-07 15:23:40 +02:00
list_lru.c
maccess.c
madvise.c
Makefile
memblock.c
memcontrol.c	mm: memcontrol: fix memcg id ref counter on swap charge move	2016-08-16 09:30:51 +02:00
memory_hotplug.c
memory-failure.c
memory.c	numa: fix /proc/<pid>/numa_maps for THP	2016-05-04 14:48:49 -07:00
mempolicy.c
mempool.c
memtest.c
migrate.c	mm: Export migrate_page_move_mapping and migrate_page_copy	2016-07-27 09:47:31 -07:00
mincore.c
mlock.c	mm: fix mlock accouting	2016-02-25 12:01:21 -08:00
mm_init.c
mmap.c	mm: fix regression in remap_file_pages() emulation	2016-02-25 12:01:21 -08:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c
mremap.c
msync.c
nobootmem.c
nommu.c
oom_kill.c
page_alloc.c	mm, meminit: ensure node is online before checking whether pages are uninitialised	2016-08-10 11:49:25 +02:00
page_counter.c
page_ext.c
page_idle.c
page_io.c
page_isolation.c	mm: fix invalid node in alloc_migrate_target()	2016-04-20 15:41:53 +09:00
page_owner.c
page-writeback.c	writeback: use higher precision calculation in domain_dirty_limits()	2016-07-27 09:47:29 -07:00
pagewalk.c
percpu-km.c
percpu-vm.c
percpu.c	percpu: fix synchronization between synchronous map extension and chunk destruction	2016-07-27 09:47:33 -07:00
pgtable-generic.c	mm,thp: khugepaged: call pte flush at the time of collapse	2016-02-25 12:01:23 -08:00
process_vm_access.c
quicklist.c
readahead.c
rmap.c
shmem.c	tmpfs: fix regression hang in fallocate undo	2016-07-27 09:47:40 -07:00
slab_common.c	mm: memcontrol: fix cgroup creation failure after many small jobs	2016-08-16 09:30:51 +02:00
slab.c
slab.h
slob.c
slub.c	slub: clean up code for kmem cgroup support to kmem_cache_free_bulk	2016-05-04 14:48:49 -07:00
sparse-vmemmap.c
sparse.c
swap_cgroup.c
swap_state.c
swap.c
swapfile.c
truncate.c
userfaultfd.c
util.c	proc: revert /proc/<pid>/maps [stack:TID] annotation	2016-09-15 08:27:46 +02:00
vmacache.c
vmalloc.c
vmpressure.c
vmscan.c	mm: delete unnecessary and unsafe init_tlb_ubc()	2016-09-30 10:18:38 +02:00
vmstat.c
workingset.c	mm: workingset: fix crash in shadow node shrinker caused by replace_page_cache_page()	2016-10-28 03:01:34 -04:00
zbud.c
zpool.c
zsmalloc.c	zsmalloc: fix zs_can_compact() integer overflow	2016-05-18 17:06:44 -07:00
zswap.c	mm/zswap: provide unique zpool name	2016-05-11 11:21:14 +02:00