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Vladimir Davydov 051dd46050 memcg, slab: unregister cache from memcg before starting to destroy it 
Currently, memcg_unregister_cache(), which deletes the cache being
destroyed from the memcg_slab_caches list, is called after
__kmem_cache_shutdown() (see kmem_cache_destroy()), which starts to
destroy the cache.

As a result, one can access a partially destroyed cache while traversing
a memcg_slab_caches list, which can have deadly consequences (for
instance, cache_show() called for each cache on a memcg_slab_caches list
from mem_cgroup_slabinfo_read() will dereference pointers to already
freed data).

To fix this, let's move memcg_unregister_cache() before the cache
destruction process beginning, issuing memcg_register_cache() on failure.

Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Glauber Costa <glommer@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07 16:36:12 -07:00
..
backing-dev.c
bdi: avoid oops on device removal
2014-04-03 16:20:49 -07:00
balloon_compaction.c
mm: print more details for bad_page()
2014-01-23 16:36:50 -08:00
bootmem.c
mm/bootmem.c: remove unused local `map'
2013-11-13 12:09:09 +09:00
bounce.c
block: Convert bio_for_each_segment() to bvec_iter
2013-11-23 22:33:49 -08:00
cleancache.c
mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
2014-01-23 16:36:50 -08:00
compaction.c
mm, compaction: determine isolation mode only once
2014-04-07 16:35:55 -07:00
debug-pagealloc.c
mm, x86: Remove debug_pagealloc_enabled
2011-12-06 09:24:07 +01:00
dmapool.c
dmapool: make DMAPOOL_DEBUG detect corruption of free marker
2012-12-11 17:22:24 -08:00
fadvise.c
teach SYSCALL_DEFINE<n> how to deal with long long/unsigned long long
2013-03-03 22:46:22 -05:00
failslab.c
switch debugfs to umode_t
2012-01-03 22:54:56 -05:00
filemap_xip.c
seqcount: Add lockdep functionality to seqcount/seqlock structures
2013-11-06 12:40:26 +01:00
filemap.c
memcg: rename high level charging functions
2014-04-07 16:35:57 -07:00
fremap.c
mm: fix bad rss-counter if remap_file_pages raced migration
2014-03-19 16:21:49 -07:00
frontswap.c
frontswap: fix incorrect zeroing and allocation size for frontswap_map
2013-06-12 16:29:46 -07:00
highmem.c
Some nice cleanups, and even a patch my wife did as a "live" demo for
2012-12-20 08:37:05 -08:00
huge_memory.c
memcg: rename high level charging functions
2014-04-07 16:35:57 -07:00
hugetlb_cgroup.c
cgroup: drop const from @buffer of cftype->write_string()
2014-03-19 10:23:54 -04:00
hugetlb.c
mm: hugetlb: fix softlockup when a large number of hugepages are freed.
2014-04-07 16:35:58 -07:00
hwpoison-inject.c
mm/hwpoison: add '#' to hwpoison_inject
2014-01-21 16:19:48 -08:00
init-mm.c
…
internal.h
mm/readahead.c: inline ra_submit
2014-04-07 16:35:58 -07:00
interval_tree.c
mm: add CONFIG_DEBUG_VM_RB build option
2012-10-09 16:22:42 +09:00
Kconfig
mm: disable split page table lock for !MMU
2014-04-07 16:35:52 -07:00
Kconfig.debug
mm: more intensive memory corruption debugging
2012-01-10 16:30:42 -08:00
kmemcheck.c
…
kmemleak-test.c
…
kmemleak.c
kmemleak: change some global variables to int
2014-04-03 16:20:50 -07:00
ksm.c
mm: close PageTail race
2014-03-04 07:55:47 -08:00
list_lru.c
mm: keep page cache radix tree nodes in check
2014-04-03 16:21:01 -07:00
maccess.c
mm: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
madvise.c
mm/hwpoison: fix traversal of hugetlbfs pages to avoid printk flood
2013-09-30 14:31:02 -07:00
Makefile
mm: per-thread vma caching
2014-04-07 16:35:53 -07:00
memblock.c
mm/memblock.c: use PFN_PHYS()
2014-04-07 16:35:58 -07:00
memcontrol.c
memcg, slab: unregister cache from memcg before starting to destroy it
2014-04-07 16:36:12 -07:00
memory_hotplug.c
mm/memory_hotplug.c: move register_memory_resource out of the lock_memory_hotplug
2014-01-23 16:36:52 -08:00
memory-failure.c
Merge branch 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2014-04-03 13:05:42 -07:00
memory.c
mm: remove unused arg of set_page_dirty_balance()
2014-04-07 16:35:57 -07:00
mempolicy.c
mm, mempolicy: remove per-process flag
2014-04-07 16:35:54 -07:00
mempool.c
mempool: add unlikely and likely hints
2014-04-07 16:35:55 -07:00
migrate.c
mm: fix swapops.h:131 bug if remap_file_pages raced migration
2014-03-20 22:09:09 -07:00
mincore.c
mm + fs: prepare for non-page entries in page cache radix trees
2014-04-03 16:21:00 -07:00
mlock.c
mm: try_to_unmap_cluster() should lock_page() before mlocking
2014-04-07 16:35:57 -07:00
mm_init.c
mm: bring back /sys/kernel/mm
2014-01-27 21:02:39 -08:00
mmap.c
mm: per-thread vma caching
2014-04-07 16:35:53 -07:00
mmu_context.c
sched/mm: call finish_arch_post_lock_switch in idle_task_exit and use_mm
2014-02-21 08:50:17 +01:00
mmu_notifier.c
mm: audit/fix non-modular users of module_init in core code
2014-01-23 16:36:52 -08:00
mmzone.c
mm: numa: Change page last {nid,pid} into {cpu,pid}
2013-10-09 14:47:45 +02:00
mprotect.c
mm: move mmu notifier call from change_protection to change_pmd_range
2014-04-07 16:35:50 -07:00
mremap.c
mm: revert mremap pud_free anti-fix
2013-10-16 21:35:53 -07:00
msync.c
…
nobootmem.c
mm/nobootmem.c: mark function as static
2014-04-03 16:21:02 -07:00
nommu.c
mm: fix 'ERROR: do not initialise globals to 0 or NULL' and coding style
2014-04-07 16:35:55 -07:00
oom_kill.c
mm, oom: base root bonus on current usage
2014-01-30 16:56:56 -08:00
page_alloc.c
mm/page_alloc.c: change mm debug routines back to EXPORT_SYMBOL
2014-04-07 16:35:59 -07:00
page_cgroup.c
mm/page_cgroup.c: mark functions as static
2014-04-03 16:21:02 -07:00
page_io.c
Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block
2014-01-30 11:19:05 -08:00
page_isolation.c
mm: memory-hotplug: enable memory hotplug to handle hugepage
2013-09-11 15:57:48 -07:00
page-writeback.c
mm: remove unused arg of set_page_dirty_balance()
2014-04-07 16:35:57 -07:00
pagewalk.c
mm/pagewalk.c: fix walk_page_range() access of wrong PTEs
2013-10-30 14:27:03 -07:00
percpu-km.c
…
percpu-vm.c
mm: fix kernel-doc warnings
2012-06-20 14:39:36 -07:00
percpu.c
percpu: renew the max_contig if we merge the head and previous block
2014-03-29 09:29:42 -04:00
pgtable-generic.c
mm: fix TLB flush race between migration, and change_protection_range
2013-12-18 19:04:51 -08:00
process_vm_access.c
mm/process_vm_access.c: mark function as static
2014-04-03 16:21:02 -07:00
quicklist.c
mm: delete various needless include <linux/module.h>
2011-10-31 09:20:11 -04:00
readahead.c
mm/readahead.c: inline ra_submit
2014-04-07 16:35:58 -07:00
rmap.c
mm: try_to_unmap_cluster() should lock_page() before mlocking
2014-04-07 16:35:57 -07:00
shmem.c
memcg: rename high level charging functions
2014-04-07 16:35:57 -07:00
slab_common.c
memcg, slab: unregister cache from memcg before starting to destroy it
2014-04-07 16:36:12 -07:00
slab.c
mm, mempolicy: remove per-process flag
2014-04-07 16:35:54 -07:00
slab.h
memcg, slab: never try to merge memcg caches
2014-04-07 16:36:12 -07:00
slob.c
mm/sl[aou]b: Move kmallocXXX functions to common code
2013-09-04 20:51:33 +03:00
slub.c
memcg, slab: never try to merge memcg caches
2014-04-07 16:36:12 -07:00
sparse-vmemmap.c
mm/sparse: use memblock apis for early memory allocations
2014-01-21 16:19:47 -08:00
sparse.c
mm: use macros from compiler.h instead of __attribute__((...))
2014-04-07 16:35:54 -07:00
swap_state.c
swap: add a simple detector for inappropriate swapin readahead
2014-02-06 13:48:51 -08:00
swap.c
mm: thrash detection-based file cache sizing
2014-04-03 16:21:01 -07:00
swapfile.c
mm/swap: fix race on swap_info reuse between swapoff and swapon
2014-02-06 13:48:51 -08:00
truncate.c
mm: keep page cache radix tree nodes in check
2014-04-03 16:21:01 -07:00
util.c
mm: use macros from compiler.h instead of __attribute__((...))
2014-04-07 16:35:54 -07:00
vmacache.c
mm: per-thread vma caching
2014-04-07 16:35:53 -07:00
vmalloc.c
mm/vmalloc.c: enhance vm_map_ram() comment
2014-04-07 16:35:55 -07:00
vmpressure.c
arm, pm, vmpressure: add missing slab.h includes
2014-02-03 13:24:01 -05:00
vmscan.c
mm/vmscan: do not check compaction_ready on promoted zones
2014-04-07 16:35:50 -07:00
vmstat.c
drop_caches: add some documentation and info message
2014-04-03 16:21:04 -07:00
workingset.c
mm: keep page cache radix tree nodes in check
2014-04-03 16:21:01 -07:00
zbud.c
mm/zbud: fix some trivial typos in comments
2013-09-11 15:57:35 -07:00
zsmalloc.c
zsmalloc: add copyright
2014-01-30 16:56:55 -08:00
zswap.c
mm/zswap.c: remove unnecessary parentheses
2014-04-07 16:36:03 -07:00