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4d7b3394f7
linux/mm
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Oleg Nesterov 4d7b3394f7 mm/oom_kill: fix the wrong task->mm == mm checks in oom_kill_process() 
Both "child->mm == mm" and "p->mm != mm" checks in oom_kill_process() are
wrong.  task->mm can be NULL if the task is the exited group leader.  This
means in particular that "kill sharing same memory" loop can miss a
process with a zombie leader which uses the same ->mm.

Note: the process_has_mm(child, p->mm) check is still not 100% correct,
p->mm can be NULL too.  This is minor, but probably deserves a fix or a
comment anyway.

[akpm@linux-foundation.org: document process_shares_mm() a bit]
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Kyle Walker <kwalker@redhat.com>
Cc: Stanislav Kozina <skozina@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-11-05 19:34:48 -08:00
..
kasan kasan: fix last shadow judgement in memory_is_poisoned_16() 2015-09-17 21:16:07 -07:00
backing-dev.c writeback: remove broken rbtree_postorder_for_each_entry_safe() usage in cgwb_bdi_destroy() 2015-10-21 08:17:29 -06:00
balloon_compaction.c mm/balloon_compaction: fix deflation when compaction is disabled 2014-10-29 16:33:15 -07:00
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_debug.c mm/cma_debug: correct size input to bitmap function 2015-07-17 16:39:54 -07:00
cma.c mm: cma: fix incorrect type conversion for size during dma allocation 2015-10-23 17:55:10 +09:00
cma.h mm: cma: mark cma_bitmap_maxno() inline in header 2015-08-14 15:56:32 -07:00
compaction.c mm, compaction: distinguish contended status in tracepoints 2015-11-05 19:34:48 -08:00
debug-pagealloc.c mm/debug-pagealloc: make debug-pagealloc boottime configurable 2014-12-13 12:42:48 -08:00
debug.c mm: introduce idle page tracking 2015-09-10 13:29:01 -07:00
dmapool.c dmapool: fix overflow condition in pool_find_page() 2015-10-01 21:42:35 -04:00
early_ioremap.c mm/early_ioremap: use offset_in_page macro 2015-11-05 19:34:48 -08:00
fadvise.c writeback: implement and use inode_congested() 2015-06-02 08:33:35 -06:00
failslab.c debugfs: Pass bool pointer to debugfs_create_bool() 2015-10-04 11:36:07 +01:00
filemap.c mm/filemap.c: make global sync not clear error status of individual inodes 2015-11-05 19:34:48 -08:00
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: make GUP handle pfn mapping unless FOLL_GET is requested 2015-09-04 16:54:41 -07:00
highmem.c mm/highmem: make kmap cache coloring aware 2014-08-06 18:01:22 -07:00
huge_memory.c - Support for new MM features in ARCv2 cores (THP, PAE40) 2015-11-03 13:21:09 -08:00
hugetlb_cgroup.c mm: page_counter: pull "-1" handling out of page_counter_memparse() 2015-02-11 17:06:02 -08:00
hugetlb.c mm: hugetlb: proc: add HugetlbPages field to /proc/PID/status 2015-11-05 19:34:48 -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
internal.h mm/compaction: correct to flush migrated pages if pageblock skip happens 2015-09-08 15:35:28 -07:00
interval_tree.c mm: replace vma->sharead.linear with vma->shared 2015-02-10 14:30:31 -08:00
Kconfig media updates for v4.3-rc1 2015-09-11 16:42:39 -07:00
Kconfig.debug mm/debug_pagealloc: remove obsolete Kconfig options 2015-01-08 15:10:52 -08:00
kmemcheck.c mm/slab_common: move kmem_cache definition to internal header 2014-10-09 22:25:50 -04:00
kmemleak-test.c mm/kmemleak-test.c: use pr_fmt for logging 2014-06-06 16:08:18 -07:00
kmemleak.c mm/kmemleak.c: remove unneeded initialization of object to NULL 2015-11-05 19:34:48 -08:00
ksm.c mm: remove rest of ACCESS_ONCE() usages 2015-04-15 16:35:18 -07:00
list_lru.c mm/list_lru.c: replace nr_node_ids for loop with for_each_node() 2015-11-05 19:34:48 -08:00
maccess.c uaccess: reimplement probe_kernel_address() using probe_kernel_read() 2015-11-05 19:34:48 -08:00
madvise.c mm: madvise allow remove operation for hugetlbfs 2015-09-08 15:35:28 -07:00
Makefile media updates for v4.3-rc1 2015-09-11 16:42:39 -07:00
memblock.c mm/memblock: make memblock_remove_range() static 2015-11-05 19:34:48 -08:00
memcontrol.c mm/memcontrol.c: fix order calculation in try_charge() 2015-11-05 19:34:48 -08:00
memory_hotplug.c mm/page_alloc: remove unused parameter in init_currently_empty_zone() 2015-11-05 19:34:48 -08:00
memory-failure.c mm: hwpoison: ratelimit messages from unpoison_memory() 2015-11-05 19:34:48 -08:00
memory.c mm, dax: fix DAX deadlocks 2015-10-16 11:42:28 -07:00
mempolicy.c mm: rename alloc_pages_exact_node() to __alloc_pages_node() 2015-09-08 15:35:28 -07:00
mempool.c mm/mempool: allow NULL `pool' pointer in mempool_destroy() 2015-09-08 15:35:28 -07:00
memtest.c memtest: remove unused header files 2015-09-08 15:35:28 -07:00
migrate.c mm, migrate: count pages failing all retries in vmstat and tracepoint 2015-11-05 19:34:48 -08:00
mincore.c mm/mincore: use offset_in_page macro 2015-11-05 19:34:48 -08:00
mlock.c mm/mlock: use offset_in_page macro 2015-11-05 19:34:48 -08:00
mm_init.c mm: meminit: remove mminit_verify_page_links 2015-06-30 19:44:56 -07:00
mmap.c mm: add the "struct mm_struct *mm" local into 2015-11-05 19:34:48 -08:00
mmu_context.c
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 userfaultfd: teach vma_merge to merge across vma->vm_userfaultfd_ctx 2015-09-04 16:54:41 -07:00
mremap.c mm/mremap: use offset_in_page macro 2015-11-05 19:34:48 -08:00
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: use offset_in_page macro 2015-11-05 19:34:48 -08:00
oom_kill.c mm/oom_kill: fix the wrong task->mm == mm checks in oom_kill_process() 2015-11-05 19:34:48 -08:00
page_alloc.c mm: fix overflow in find_zone_movable_pfns_for_nodes() 2015-11-05 19:34:48 -08:00
page_counter.c mm: page_counter: pull "-1" handling out of page_counter_memparse() 2015-02-11 17:06:02 -08:00
page_ext.c mm: introduce idle page tracking 2015-09-10 13:29:01 -07:00
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, page_isolation: make set/unset_migratetype_isolate() file-local 2015-09-08 15:35:28 -07:00
page_owner.c mm/page_owner: set correct gfp_mask on page_owner 2015-07-17 16:39:54 -07:00
page-writeback.c writeback: fix incorrect calculation of available memory for memcg domains 2015-10-12 10:31:13 -06:00
pagewalk.c mm/pagewalk.c: prevent positive return value of walk_page_test() from being passed to callers 2015-03-25 16:20:30 -07:00
percpu-km.c percpu: implmeent pcpu_nr_empty_pop_pages and chunk->nr_populated 2014-09-02 14:46:05 -04:00
percpu-vm.c percpu: move region iterations out of pcpu_[de]populate_chunk() 2014-09-02 14:46:02 -04:00
percpu.c mm/percpu: use offset_in_page macro 2015-11-05 19:34:48 -08:00
pgtable-generic.c mm,thp: introduce flush_pmd_tlb_range 2015-10-17 17:48:20 +05:30
process_vm_access.c process_vm_access: switch to {compat_,}import_iovec() 2015-04-11 22:27:12 -04:00
quicklist.c
readahead.c mm: use only per-device readahead limit 2015-11-05 19:34:48 -08:00
rmap.c mm: hugetlb: proc: add HugetlbPages field to /proc/PID/status 2015-11-05 19:34:48 -08:00
shmem.c shmem: recalculate file inode when fstat 2015-09-08 15:35:28 -07:00
slab_common.c mm/slab_common.c: initialize kmem_cache pointer to NULL 2015-11-05 19:34:48 -08:00
slab.c mm: slab: only move management objects off-slab for sizes larger than KMALLOC_MIN_SIZE 2015-11-05 19:34:48 -08:00
slab.h mm/slab_common.c: clear pointers to per memcg caches on destroy 2015-11-05 19:34:48 -08:00
slob.c mm: rename alloc_pages_exact_node() to __alloc_pages_node() 2015-09-08 15:35:28 -07:00
slub.c mm/slub: calculate start order with reserved in consideration 2015-11-05 19:34:48 -08:00
sparse-vmemmap.c
sparse.c
swap_cgroup.c mm: page_cgroup: rename file to mm/swap_cgroup.c 2014-12-10 17:41:09 -08:00
swap_state.c mm: swap: zswap: maybe_preload & refactoring 2015-09-08 15:35:28 -07:00
swap.c mm: introduce idle page tracking 2015-09-10 13:29:01 -07:00
swapfile.c mm: /proc/pid/smaps:: show proportional swap share of the mapping 2015-09-08 15:35:28 -07:00
truncate.c memcg: add per cgroup dirty page accounting 2015-06-02 08:33:33 -06:00
userfaultfd.c userfaultfd: avoid mmap_sem read recursion in mcopy_atomic 2015-09-04 16:54:41 -07:00
util.c mm/util: use offset_in_page macro 2015-11-05 19:34:48 -08:00
vmacache.c mm,vmacache: count number of system-wide flushes 2014-12-13 12:42:48 -08:00
vmalloc.c mm/vmalloc: use offset_in_page macro 2015-11-05 19:34:48 -08:00
vmpressure.c mm/vmpressure.c: fix race in vmpressure_work_fn() 2014-12-02 17:32:07 -08:00
vmscan.c mm/vmscan.c: fix types of some locals 2015-11-05 19:34:48 -08:00
vmstat.c vmstat: explicitly schedule per-cpu work on the CPU we need it to run on 2015-10-15 13:01:50 -07:00
workingset.c list_lru: add helpers to isolate items 2015-02-12 18:54:10 -08:00
zbud.c mm: zbud: constify the zbud_ops 2015-09-08 15:35:28 -07:00
zpool.c zpool: add zpool_has_pool() 2015-09-10 13:29:01 -07:00
zsmalloc.c mm: zpool: constify the zpool_ops 2015-09-08 15:35:28 -07:00
zswap.c zswap: change zpool/compressor at runtime 2015-09-10 13:29:01 -07:00