Davidlohr Bueso 7b24d8616b mm, hugetlb: fix race in region tracking ...

There is a race condition if we map a same file on different processes.
Region tracking is protected by mmap_sem and hugetlb_instantiation_mutex.
When we do mmap, we don't grab a hugetlb_instantiation_mutex, but only
mmap_sem (exclusively).  This doesn't prevent other tasks from modifying
the region structure, so it can be modified by two processes
concurrently.

To solve this, introduce a spinlock to resv_map and make region
manipulation function grab it before they do actual work.

[davidlohr@hp.com: updated changelog]
Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Suggested-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2014-04-03 16:20:59 -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: ignore pageblock skip when manually invoking compaction

2014-04-03 16:20:58 -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

mm: optimize put_mems_allowed() usage

2014-04-03 16:20:58 -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

mm: include VM_MIXEDMAP flag in the VM_SPECIAL list to avoid m(un)locking

2014-03-04 07:55:48 -08:00

hugetlb_cgroup.c

mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE

2014-01-23 16:36:50 -08:00

hugetlb.c

mm, hugetlb: fix race in region tracking

2014-04-03 16:20:59 -07:00

hwpoison-inject.c

mm/hwpoison: add '#' to hwpoison_inject

2014-01-21 16:19:48 -08:00

init-mm.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

internal.h

mm/page-writeback.c: do not count anon pages as dirtyable memory

2014-01-29 16:22:39 -08:00

interval_tree.c

mm: add CONFIG_DEBUG_VM_RB build option

2012-10-09 16:22:42 +09:00

Kconfig

mm/Kconfig: fix URL for zsmalloc benchmark

2014-03-10 17:26:20 -07:00

Kconfig.debug

mm: more intensive memory corruption debugging

2012-01-10 16:30:42 -08:00

kmemcheck.c

…

kmemleak-test.c

kmemleak: remove memset by using kzalloc

2011-01-27 18:31:51 +00:00

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: list_lru: fix almost infinite loop causing effective livelock

2013-10-30 12:57:46 -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

zsmalloc: move it under mm

2014-01-30 16:56:55 -08:00

memblock.c

memblock: add limit checking to memblock_virt_alloc

2014-01-29 16:22:40 -08:00

memcontrol.c

memcg: reparent charges of children before processing parent

2014-03-04 07:55:48 -08:00

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

mm: close PageTail race

2014-03-04 07:55:47 -08:00

memory.c

mm, thp: fix infinite loop on memcg OOM

2014-02-25 15:25:44 -08:00

mempolicy.c

mm: optimize put_mems_allowed() usage

2014-04-03 16:20:58 -07:00

mempool.c

mm/mempool.c: convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)

2013-09-11 15:58:14 -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: do_mincore() cleanup

2014-01-23 16:36:52 -08:00

mlock.c

mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE

2014-01-23 16:36:50 -08:00

mm_init.c

mm: bring back /sys/kernel/mm

2014-01-27 21:02:39 -08:00

mmap.c

mm: Add new func _install_special_mapping() to mmap.c

2014-03-18 12:51:56 -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: Use ptep/pmdp_set_numa() for updating _PAGE_NUMA bit

2014-02-17 11:19:36 +11:00

mremap.c

mm: revert mremap pud_free anti-fix

2013-10-16 21:35:53 -07:00

msync.c

…

nobootmem.c

mm/nobootmem: free_all_bootmem again

2014-01-23 16:36:52 -08:00

nommu.c

mm: add overcommit_kbytes sysctl variable

2014-01-21 16:19:44 -08:00

oom_kill.c

mm, oom: base root bonus on current usage

2014-01-30 16:56:56 -08:00

page_alloc.c

mm: optimize put_mems_allowed() usage

2014-04-03 16:20:58 -07:00

page_cgroup.c

Merge branch 'akpm' (incoming from Andrew)

2014-01-21 19:05:45 -08:00

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: __set_page_dirty_nobuffers() uses spin_lock_irqsave() instead of spin_lock_irq()

2014-02-06 13:48:51 -08:00

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: clear memory allocated with the km allocator

2010-10-02 10:28:42 +03:00

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/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types

2014-03-06 16:30:47 +01:00

quicklist.c

mm: delete various needless include <linux/module.h>

2011-10-31 09:20:11 -04:00

readahead.c

mm/readahead.c: fix do_readahead() for no readpage(s)

2014-01-29 16:22:40 -08:00

rmap.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2014-03-31 14:35:30 -07:00

shmem.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2014-01-28 08:38:04 -08:00

slab_common.c

slab: fix wrong retval on kmem_cache_create_memcg error path

2014-01-29 16:22:40 -08:00

slab.c

mm: optimize put_mems_allowed() usage

2014-04-03 16:20:58 -07:00

slab.h

memcg, slab: RCU protect memcg_params for root caches

2014-01-23 16:36:51 -08:00

slob.c

mm/sl[aou]b: Move kmallocXXX functions to common code

2013-09-04 20:51:33 +03:00

slub.c

mm: optimize put_mems_allowed() usage

2014-04-03 16:20:58 -07:00

sparse-vmemmap.c

mm/sparse: use memblock apis for early memory allocations

2014-01-21 16:19:47 -08:00

sparse.c

sparse: fix comment

2014-04-02 09:16:17 +02:00

swap_state.c

swap: add a simple detector for inappropriate swapin readahead

2014-02-06 13:48:51 -08:00

swap.c

mm: close PageTail race

2014-03-04 07:55:47 -08:00

swapfile.c

mm/swap: fix race on swap_info reuse between swapoff and swapon

2014-02-06 13:48:51 -08:00

truncate.c

truncate: drop 'oldsize' truncate_pagecache() parameter

2013-09-12 15:38:02 -07:00

util.c

mm: add overcommit_kbytes sysctl variable

2014-01-21 16:19:44 -08:00

vmalloc.c

Revert "mm/vmalloc: interchage the implementation of vmalloc_to_{pfn,page}"

2014-01-27 21:02:39 -08:00

vmpressure.c

arm, pm, vmpressure: add missing slab.h includes

2014-02-03 13:24:01 -05:00

vmscan.c

mm: vmscan: remove shrink_control arg from do_try_to_free_pages()

2014-04-03 16:20:58 -07:00

vmstat.c

mm, x86: Account for TLB flushes only when debugging

2014-01-25 09:10:41 +01:00

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: change params from hidden to ro

2014-01-23 16:36:50 -08:00