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linux/mm
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Konstantin Khlebnikov 745b4a707a mm: replace vma_lock_anon_vma with anon_vma_lock_read/write 
commit 12352d3cae upstream.

Sequence vma_lock_anon_vma() - vma_unlock_anon_vma() isn't safe if
anon_vma appeared between lock and unlock.  We have to check anon_vma
first or call anon_vma_prepare() to be sure that it's here.  There are
only few users of these legacy helpers.  Let's get rid of them.

This patch fixes anon_vma lock imbalance in validate_mm().  Write lock
isn't required here, read lock is enough.

And reorders expand_downwards/expand_upwards: security_mmap_addr() and
wrapping-around check don't have to be under anon vma lock.

Link: https://lkml.kernel.org/r/CACT4Y+Y908EjM2z=706dv4rV6dWtxTLK9nFg9_7DhRMLppBo2g@mail.gmail.com
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
History 2016-02-25 10:34:44 +00:00
..
backing-dev.c mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make any progress 2016-02-25 10:34:43 +00:00
balloon_compaction.c virtio_balloon: fix race between migration and ballooning 2016-02-02 19:09:33 +00:00
bootmem.c mem-hotplug: reset node managed pages when hot-adding a new pgdat 2014-11-27 11:21:50 +00:00
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: fix wrong order check in compact_finished() 2015-03-02 15:04:20 +00:00
debug-pagealloc.c mm, x86: Remove debug_pagealloc_enabled 2011-12-06 09:24:07 +01:00
dmapool.c Fix unbalanced mutex in dma_pool_create(). 2014-10-05 13:41:09 -07:00
early_ioremap.c mm: create generic early_ioremap() support 2014-04-07 16:36:15 -07:00
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.c mm: make sendfile(2) killable 2015-11-16 11:27:05 +00:00
filemap_xip.c seqcount: Add lockdep functionality to seqcount/seqlock structures 2013-11-06 12:40:26 +01:00
fremap.c mm: mark remap_file_pages() syscall as deprecated 2014-06-06 16:08:17 -07:00
frontswap.c mm: frontswap: invalidate expired data on a dup-store failure 2014-12-10 17:49:41 +00:00
gup.c mm/hugetlb: take page table lock in follow_huge_pmd() 2015-03-02 13:17:15 +00:00
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, thp: fix collapsing of hugepages on madvise 2014-11-13 11:48:56 +00:00
hugetlb.c mm: hugetlb: call huge_pte_alloc() only if ptep is null 2016-01-25 10:43:28 +00:00
hugetlb_cgroup.c cgroup: remove css_parent() 2014-05-16 13:22:48 -04:00
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, compaction: properly signal and act upon lock and need_sched() contention 2014-06-04 16:54:11 -07:00
interval_tree.c mm: add CONFIG_DEBUG_VM_RB build option 2012-10-09 16:22:42 +09:00
iov_iter.c Fix thinko in iov_iter_single_seg_count 2014-11-27 11:21:48 +00:00
Kconfig mm/zsmalloc: make zsmalloc module-buildable 2014-06-04 16:54:14 -07:00
Kconfig.debug mm: more intensive memory corruption debugging 2012-01-10 16:30:42 -08:00
kmemcheck.c kmemcheck: Fix build errors due to missing slab.h 2010-03-30 22:02:32 +09:00
kmemleak-test.c mm/kmemleak-test.c: use pr_fmt for logging 2014-06-06 16:08:18 -07:00
kmemleak.c mm: kmemleak: allow safe memory scanning during kmemleak disabling 2015-07-15 10:00:54 +01:00
ksm.c vm: add VM_FAULT_SIGSEGV handling support 2015-02-04 10:58:27 +00:00
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: madvise: fix MADV_WILLNEED on shmem swapouts 2014-05-23 09:37:29 -07:00
Makefile mm: move get_user_pages()-related code to separate file 2014-06-04 16:54:04 -07:00
memblock.c memblock, memhotplug: fix wrong type in memblock_find_in_range_node(). 2014-10-05 13:41:03 -07:00
memcontrol.c memcg: only free spare array when readers are done 2016-02-02 19:09:49 +00:00
memory-failure.c mm: soft-offline: check return value in second __get_any_page() call 2016-02-02 19:09:48 +00:00
memory.c mm: avoid setting up anonymous pages into file mapping 2015-08-11 09:57:27 +01:00
memory_hotplug.c mm/memory_hotplug.c: check for missing sections in test_pages_in_a_zone() 2016-01-25 10:43:59 +00:00
mempolicy.c mm, numa: really disable NUMA balancing by default on single node machines 2015-05-28 10:00:03 +01:00
mempool.c mm/mempool.c: update the kmemleak stack trace for mempool allocations 2014-06-06 16:08:17 -07:00
migrate.c mm/hugetlb: take page table lock in follow_huge_pmd() 2015-03-02 13:17:15 +00:00
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: replace vma_lock_anon_vma with anon_vma_lock_read/write 2016-02-25 10:34:44 +00:00
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, thp: close race between mremap() and split_huge_page() 2014-05-11 17:55:48 +09:00
msync.c msync: fix incorrect fstart calculation 2014-07-03 09:21:53 -07:00
nobootmem.c mem-hotplug: reset node managed pages when hot-adding a new pgdat 2014-11-27 11:21:50 +00:00
nommu.c mm/nommu.c: fix arithmetic overflow in __vm_enough_memory() 2015-03-02 13:17:17 +00:00
oom_kill.c OOM, PM: OOM killed task shouldn't escape PM suspend 2014-11-05 11:43:09 +00:00
page-writeback.c writeback: use |1 instead of +1 to protect against div by zero 2015-05-20 13:25:57 +01:00
page_alloc.c mm: when stealing freepages, also take pages created by splitting buddy page 2015-03-02 13:17:16 +00:00
page_cgroup.c cgroup/kmemleak: add kmemleak_free() for cgroup deallocations. 2014-11-13 11:48:55 +00:00
page_io.c fix __swap_writepage() compile failure on old gcc versions 2014-06-14 19:30:48 -05:00
page_isolation.c mm: memory-hotplug: enable memory hotplug to handle hugepage 2013-09-11 15:57:48 -07:00
pagewalk.c mm: pagewalk: call pte_hole() for VM_PFNMAP during walk_page_range 2015-02-10 13:38:47 +00:00
percpu-km.c percpu: clear memory allocated with the km allocator 2010-10-02 10:28:42 +03:00
percpu-vm.c percpu: perform tlb flush after pcpu_map_pages() failure 2014-10-05 13:41:06 -07:00
percpu.c Revert "percpu: free percpu allocation info for uniprocessor system" 2014-11-14 15:20:06 +00:00
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 start adding the tag to iov_iter 2014-05-06 17:32:49 -04:00
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: fix anon_vma->degree underflow in anon_vma endless growing prevention 2015-04-10 10:04:05 +01:00
shmem.c shmem: fix nlink for rename overwrite directory 2014-10-05 13:41:03 -07:00
slab.c mm: slab: only move management objects off-slab for sizes larger than KMALLOC_MIN_SIZE 2015-12-13 17:49:11 +00:00
slab.h memcg, slab: merge memcg_{bind,release}_pages to memcg_{un}charge_slab 2014-06-04 16:54:01 -07:00
slab_common.c Merge branch 'slab/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux into for-3.16-rcX 2014-07-22 18:38:27 -04:00
slob.c slab: get_online_mems for kmem_cache_{create,destroy,shrink} 2014-06-04 16:53:59 -07:00
slub.c slub: fix off by one in number of slab tests 2014-07-03 09:21:53 -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.c mm: non-atomically mark page accessed during page cache allocation where possible 2014-06-04 16:54:10 -07:00
swap_state.c mm: page_alloc: convert hot/cold parameter and immediate callers to bool 2014-06-04 16:54:09 -07:00
swapfile.c mm/swapfile.c: delete the "last_in_cluster < scan_base" loop in the body of scan_swap_map() 2014-06-04 16:54:12 -07:00
truncate.c mm: Remove false WARN_ON from pagecache_isize_extended() 2014-11-13 11:49:03 +00:00
util.c vm_is_stack: use for_each_thread() rather then buggy while_each_thread() 2014-09-05 16:36:43 -07:00
vmacache.c mm,vmacache: optimize overflow system-wide flushing 2014-06-04 16:53:57 -07:00
vmalloc.c mm/vmalloc.c: export unmap_kernel_range() 2014-06-04 16:54:14 -07:00
vmpressure.c mm/vmpressure.c: fix race in vmpressure_work_fn() 2014-12-10 17:49:42 +00:00
vmscan.c vmscan: fix increasing nr_isolated incurred by putback unevictable pages 2015-09-29 16:44:51 +01:00
vmstat.c vmstat: explicitly schedule per-cpu work on the CPU we need it to run on 2016-02-24 10:26:37 +00:00
workingset.c mm: keep page cache radix tree nodes in check 2014-04-03 16:21:01 -07:00
zbud.c mm/zbud.c: make size unsigned like unique callsite 2014-06-04 16:54:13 -07:00
zsmalloc.c zsmalloc: fixup trivial zs size classes value in comments 2014-06-04 16:54:13 -07:00
zswap.c mm/zswap: NUMA aware allocation for zswap_dstmem 2014-06-04 16:54:14 -07:00