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android_kernel_oneplus_msm8998/mm
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Chintan Pandya b752dfd91a mm: vmalloc: avoid racy handling of debugobjects in vunmap 
[ Upstream commit f3c01d2f3ade6790db67f80fef60df84424f8964 ]

Currently, __vunmap flow is,
 1) Release the VM area
 2) Free the debug objects corresponding to that vm area.

This leave some race window open.
 1) Release the VM area
 1.5) Some other client gets the same vm area
 1.6) This client allocates new debug objects on the same
      vm area
 2) Free the debug objects corresponding to this vm area.

Here, we actually free 'other' client's debug objects.

Fix this by freeing the debug objects first and then releasing the VM
area.

Link: http://lkml.kernel.org/r/1523961828-9485-2-git-send-email-cpandya@codeaurora.org
Signed-off-by: Chintan Pandya <cpandya@codeaurora.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Byungchul Park <byungchul.park@lge.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yisheng Xie <xieyisheng1@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-08-06 16:24:30 +02:00
..
kasan kasan: fix memory hotplug during boot 2018-05-30 07:48:51 +02:00
backing-dev.c writeback: fix the wrong congested state variable definition 2018-04-08 11:51:56 +02:00
balloon_compaction.c virtio_balloon: fix race between migration and ballooning 2016-03-03 15:07:18 -08:00
bootmem.c bootmem: avoid freeing to bootmem after bootmem is done 2015-09-08 15:35:28 -07:00
cleancache.c cleancache: remove limit on the number of cleancache enabled filesystems 2015-04-14 16:49:03 -07:00
cma.c cma: fix calculation of aligned offset 2018-01-31 12:06:09 +01:00
cma.h mm: cma: mark cma_bitmap_maxno() inline in header 2015-08-14 15:56:32 -07:00
cma_debug.c mm/cma_debug: correct size input to bitmap function 2015-07-17 16:39:54 -07:00
compaction.c mm/compaction: pass only pageblock aligned range to pageblock_pfn_to_page 2018-01-17 09:35:26 +01:00
debug-pagealloc.c mm, hwpoison: fixup "mm: check the return value of lookup_page_ext for all call sites" 2017-11-24 11:26:29 +01:00
debug.c mm: make compound_head() robust 2015-11-06 17:50:42 -08:00
dmapool.c mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd 2015-11-06 17:50:42 -08:00
early_ioremap.c mm/early_ioremap: Fix boot hang with earlyprintk=efi,keep 2018-02-25 11:03:41 +01:00
fadvise.c writeback: implement and use inode_congested() 2015-06-02 08:33:35 -06:00
failslab.c mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM 2015-11-06 17:50:42 -08:00
filemap.c mm: filemap: avoid unnecessary calls to lock_page when waiting for IO to complete during a read 2018-05-26 08:48:54 +02:00
frame_vector.c mm: fix docbook comment for get_vaddr_frames() 2015-11-05 19:34:48 -08:00
frontswap.c frontswap: allow multiple backends 2015-06-24 17:49:45 -07:00
gup.c mm: larger stack guard gap, between vmas 2017-06-26 07:13:11 +02:00
highmem.c
huge_memory.c thp: fix MADV_DONTNEED vs. numa balancing race 2017-12-16 10:33:50 +01:00
hugetlb.c mm: hugetlb: yield when prepping struct pages 2018-07-11 16:03:48 +02:00
hugetlb_cgroup.c mm: make compound_head() robust 2015-11-06 17:50:42 -08:00
hwpoison-inject.c hwpoison: use page_cgroup_ino for filtering by memcg 2015-09-10 13:29:01 -07:00
init-mm.c mm: Add a user_ns owner to mm_struct and fix ptrace permission checks 2017-01-06 11:16:11 +01:00
internal.h mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries 2017-08-11 09:08:50 -07:00
interval_tree.c mm: replace vma->sharead.linear with vma->shared 2015-02-10 14:30:31 -08:00
Kconfig mm: don't allow deferred pages with NEED_PER_CPU_KM 2018-05-26 08:48:55 +02:00
Kconfig.debug mm/debug_pagealloc: remove obsolete Kconfig options 2015-01-08 15:10:52 -08:00
kmemcheck.c
kmemleak-test.c
kmemleak.c mm/kmemleak.c: wait for scan completion before disabling free 2018-05-30 07:49:06 +02:00
ksm.c mm/ksm: fix interaction with THP 2018-05-30 07:49:08 +02:00
list_lru.c mm/list_lru.c: fix list_lru_count_node() to be race free 2017-07-21 07:44:56 +02:00
maccess.c mm/maccess.c: actually return -EFAULT from strncpy_from_unsafe 2015-11-05 19:34:48 -08:00
madvise.c mm/madvise.c: fix madvise() infinite loop under special circumstances 2017-12-05 11:22:50 +01:00
Makefile media updates for v4.3-rc1 2015-09-11 16:42:39 -07:00
memblock.c mm: consider memblock reservations for deferred memory initialization sizing 2017-06-14 13:16:26 +02:00
memcontrol.c mm: memcg: fix use after free in mem_cgroup_iter() 2018-07-25 10:18:16 +02:00
memory-failure.c hwpoison, memcg: forcibly uncharge LRU pages 2018-01-31 12:06:09 +01:00
memory.c mm: allow GFP_{FS,IO} for page_cache_read page cache allocation 2018-04-24 09:32:11 +02:00
memory_hotplug.c base/memory, hotplug: fix a kernel oops in show_valid_zones() 2017-02-09 08:02:47 +01:00
mempolicy.c mm/mempolicy.c: avoid use uninitialized preferred_node 2018-05-30 07:49:05 +02:00
mempool.c mm/mempool: avoid KASAN marking mempool poison checks as use-after-free 2017-08-12 19:29:09 -07:00
memtest.c memtest: remove unused header files 2015-09-08 15:35:28 -07:00
migrate.c Sanitize 'move_pages()' permission checks 2017-08-24 17:02:36 -07:00
mincore.c mm/mincore: use offset_in_page macro 2015-11-05 19:34:48 -08:00
mlock.c mlock: fix mlock count can not decrease in race condition 2017-06-07 12:06:01 +02:00
mm_init.c mm: meminit: remove mminit_verify_page_links 2015-06-30 19:44:56 -07:00
mmap.c mmap: relax file size limit for regular files 2018-06-13 16:15:27 +02:00
mmu_context.c mm/mmu_context, sched/core: Fix mmu_context.h assumption 2017-12-25 14:22:09 +01:00
mmu_notifier.c mmu-notifier: add clear_young callback 2015-09-10 13:29:01 -07:00
mmzone.c mm: microoptimize zonelist operations 2015-02-11 17:06:02 -08:00
mprotect.c mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries 2017-08-11 09:08:50 -07:00
mremap.c mm, mprotect: flush TLB if potentially racing with a parallel reclaim leaving stale TLB entries 2017-08-11 09:08:50 -07:00
msync.c mm/msync: use offset_in_page macro 2015-11-05 19:34:48 -08:00
nobootmem.c mm: page_alloc: pass PFN to __free_pages_bootmem 2015-06-30 19:44:55 -07:00
nommu.c mm/nommu.c: drop unlikely inside BUG_ON() 2015-11-05 19:34:48 -08:00
oom_kill.c mm/oom_kill.c: avoid attempting to kill init sharing same memory 2015-12-12 10:15:34 -08:00
page-writeback.c writeback: safer lock nesting 2018-04-24 09:32:12 +02:00
page_alloc.c mm, page_alloc: do not break __GFP_THISNODE by zonelist reset 2018-07-11 16:03:51 +02:00
page_counter.c mm: page_counter: let page_counter_try_charge() return bool 2015-11-05 19:34:48 -08:00
page_ext.c mm/page_ext.c: check if page_ext is not prepared 2017-11-24 08:32:25 +01:00
page_idle.c mm: introduce idle page tracking 2015-09-10 13:29:01 -07:00
page_io.c fs: use helper bio_add_page() instead of open coding on bi_io_vec 2015-08-13 12:32:00 -06:00
page_isolation.c mm: fix invalid node in alloc_migrate_target() 2016-04-20 15:41:53 +09:00
page_owner.c mm: check the return value of lookup_page_ext for all call sites 2017-11-24 08:32:25 +01:00
pagewalk.c mm/pagewalk.c: report holes in hugetlb ranges 2017-11-24 08:32:25 +01:00
percpu-km.c
percpu-vm.c
percpu.c percpu: include linux/sched.h for cond_resched() 2018-05-16 10:06:46 +02:00
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 ptrace: use fsuid, fsgid, effective creds for fs access checks 2016-02-25 12:01:16 -08:00
quicklist.c
readahead.c mm, fs: introduce mapping_gfp_constraint() 2015-11-06 17:50:42 -08:00
rmap.c mm/rmap: batched invalidations should use existing api 2017-12-25 14:22:09 +01:00
shmem.c tmpfs: fix regression hang in fallocate undo 2016-07-27 09:47:40 -07:00
slab.c mm, slab: reschedule cache_reap() on the same CPU 2018-04-24 09:32:05 +02:00
slab.h slab/slub: adjust kmem_cache_alloc_bulk API 2015-11-22 11:58:44 -08:00
slab_common.c slub: do not merge cache if slub_debug contains a never-merge flag 2017-10-21 17:09:05 +02:00
slob.c slab/slub: adjust kmem_cache_alloc_bulk API 2015-11-22 11:58:44 -08:00
slub.c slub/memcg: cure the brainless abuse of sysfs attributes 2017-06-07 12:06:01 +02:00
sparse-vmemmap.c
sparse.c
swap.c mm: make compound_head() robust 2015-11-06 17:50:42 -08:00
swap_cgroup.c mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff() 2017-07-05 14:37:15 +02:00
swap_state.c mm: swap: zswap: maybe_preload & refactoring 2015-09-08 15:35:28 -07:00
swapfile.c swap: divide-by-zero when zero length swap file on ssd 2018-05-30 07:49:07 +02:00
truncate.c fs: add i_blocksize() 2017-06-14 13:16:24 +02:00
userfaultfd.c userfaultfd: avoid mmap_sem read recursion in mcopy_atomic 2015-09-04 16:54:41 -07:00
util.c proc read mm's {arg,env}_{start,end} with mmap semaphore taken. 2018-05-26 08:48:55 +02:00
vmacache.c mm/vmacache: inline vmacache_valid_mm() 2015-11-05 19:34:48 -08:00
vmalloc.c mm: vmalloc: avoid racy handling of debugobjects in vunmap 2018-08-06 16:24:30 +02:00
vmpressure.c mm: vmpressure: fix sending wrong events on underflow 2017-03-12 06:37:25 +01:00
vmscan.c mm: fix the NULL mapping case in __isolate_lru_page() 2018-06-06 16:46:23 +02:00
vmstat.c proc: much faster /proc/vmstat 2018-01-10 09:27:14 +01:00
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 mm: zsmalloc: constify struct zs_pool name 2015-11-06 17:50:42 -08:00
zpool.c mm: zsmalloc: constify struct zs_pool name 2015-11-06 17:50:42 -08:00
zsmalloc.c zsmalloc: fix zs_can_compact() integer overflow 2016-05-18 17:06:44 -07:00
zswap.c zswap: don't param_set_charp while holding spinlock 2018-01-17 09:35:27 +01:00