Free memory is 7116kB above reserved
lowmemorykiller: Killing 'syz-executor.5' (2632) (tgid 2632), adj 1000,
   to free 34992kB on behalf of 'getty' (1592) because
   cache 2916kB is below limit 8192kB for oom_score_adj 1
   Free memory is 7116kB above reserved
INFO: task kworker/u4:5:2190 blocked for more than 140 seconds.
      Not tainted 4.4.174+ #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:5    D ffff8801c1b4f968 22368  2190      2 0x80000000
Workqueue: netns cleanup_net
 ffff8801c1b4f968 ffff8801d91f2f80 54bc06742322032c ffff8801d91f2f80
 0000000000000002 ffff8801d91f3800 ffff8801db71f180 ffff8801db71f1a8
 ffff8801db71e898 ffff8800466817c0 ffff8801d91f2f80 ffffed0038369001
Call Trace:
 [<ffffffff82709b79>] schedule+0x99/0x1d0 kernel/sched/core.c:3355
 [<ffffffff8270a333>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388
 [<ffffffff8270c492>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff8270c492>] mutex_lock_nested+0x3c2/0xb80 kernel/locking/mutex.c:621
 [<ffffffff8221a971>] cleanup_net+0x131/0x860 net/core/net_namespace.c:418
 [<ffffffff81122c25>] process_one_work+0x825/0x1720 kernel/workqueue.c:2064
 [<ffffffff81124004>] worker_thread+0x4e4/0xf50 kernel/workqueue.c:2196
 [<ffffffff811342c3>] kthread+0x273/0x310 kernel/kthread.c:211
 [<ffffffff82718fc5>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537
lowmemorykiller: Killing 'syz-executor.5' (2632) (tgid 2632), adj 1000,
   to free 34992kB on behalf of 'rsyslogd' (1924) because
   cache 2916kB is below limit 8192kB for oom_score_adj 1
   Free memory is 7044kB above reserved
lowmemorykiller: Killing 'syz-executor.5' (2632) (tgid 2632), adj 1000,
   to free 34992kB on behalf of 'kswapd0' (28) because
   cache 2916kB is below limit 8192kB for oom_score_adj 1
   Free memory is 7044kB above reserved
3 locks held by kworker/u4:5/2190:
 #0:  ("%s""netns"){.+.+.+}, at: [<ffffffff81122b0a>] process_one_work+0x70a/0x1720 kernel/workqueue.c:2057
 #1:  (net_cleanup_work){+.+.+.}, at: [<ffffffff81122b42>] process_one_work+0x742/0x1720 kernel/workqueue.c:2061
 #2:  (net_mutex){+.+.+.}, at: [<ffffffff8221a971>] cleanup_net+0x131/0x860 net/core/net_namespace.c:418
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 1513 Comm: getty Not tainted 4.4.174+ #4
task: ffff88009361af80 task.stack: ffff8801300c0000
RIP: 0010:[<ffffffff812067ad>]  [<ffffffff812067ad>] lock_release+0x54d/0xcf0 kernel/locking/lockdep.c:3613
RSP: 0000:ffff8801300c7290  EFLAGS: 00000803
RAX: dffffc0000000000 RBX: ffff88009361af80 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000005 RDI: ffff88009361b844
RBP: ffff8801300c7340 R08: 0000000000000004 R09: ffff88009361b908
R10: ffffffff83a15160 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f186161e814 CR3: 0000000089fc1000 CR4: 00000000001606b0
Stack:
 0000000000000000 ffffffff813c28d2 ffff880100000000 0000000000000000
 0000000000000000 ffffffff813c28d2 ffff880100000000 0000000000000000
 fffffbfff080af50 ffff88009361b840 0000000500000000 ffff88009361b848
Call Trace:
 [<ffffffff813c293e>] rcu_lock_release include/linux/rcupdate.h:482 [inline]
 [<ffffffff813c293e>] rcu_read_unlock include/linux/rcupdate.h:917 [inline]
 [<ffffffff813c293e>] find_lock_task_mm+0x15e/0x280 mm/oom_kill.c:116
 [<ffffffff8211e7cb>] lowmem_scan+0x45b/0xbf0 drivers/staging/android/lowmemorykiller.c:132
 [<ffffffff813ee8e2>] do_shrink_slab mm/vmscan.c:357 [inline]
 [<ffffffff813ee8e2>] shrink_slab.part.0+0x402/0xb30 mm/vmscan.c:455
 [<ffffffff813f742c>] shrink_slab mm/vmscan.c:425 [inline]
 [<ffffffff813f742c>] shrink_zone+0x4bc/0x610 mm/vmscan.c:2448
 [<ffffffff813f7bef>] shrink_zones mm/vmscan.c:2603 [inline]
 [<ffffffff813f7bef>] do_try_to_free_pages mm/vmscan.c:2653 [inline]
 [<ffffffff813f7bef>] try_to_free_pages+0x66f/0x1260 mm/vmscan.c:2861
 [<ffffffff813d09af>] __perform_reclaim mm/page_alloc.c:2915 [inline]
 [<ffffffff813d09af>] __alloc_pages_direct_reclaim mm/page_alloc.c:2936 [inline]
 [<ffffffff813d09af>] __alloc_pages_slowpath mm/page_alloc.c:3201 [inline]
 [<ffffffff813d09af>] __alloc_pages_nodemask+0x8af/0x14b0 mm/page_alloc.c:3313
 [<ffffffff813dc242>] __alloc_pages include/linux/gfp.h:415 [inline]
 [<ffffffff813dc242>] __alloc_pages_node include/linux/gfp.h:428 [inline]
 [<ffffffff813dc242>] alloc_pages_node include/linux/gfp.h:442 [inline]
 [<ffffffff813dc242>] __page_cache_alloc include/linux/pagemap.h:226 [inline]
 [<ffffffff813dc242>] page_cache_alloc_readahead include/linux/pagemap.h:242 [inline]
 [<ffffffff813dc242>] __do_page_cache_readahead+0x222/0x840 mm/readahead.c:184
 [<ffffffff813bf6de>] ra_submit mm/internal.h:55 [inline]
 [<ffffffff813bf6de>] do_sync_mmap_readahead mm/filemap.c:1917 [inline]
 [<ffffffff813bf6de>] filemap_fault+0x74e/0xc10 mm/filemap.c:1994
 [<ffffffff81665ed2>] ext4_filemap_fault+0x72/0xa0 fs/ext4/inode.c:5558
 [<ffffffff8142e82a>] __do_fault+0x1ca/0x350 mm/memory.c:2822
 [<ffffffff8143aec2>] do_cow_fault mm/memory.c:3052 [inline]
 [<ffffffff8143aec2>] do_fault mm/memory.c:3180 [inline]
 [<ffffffff8143aec2>] handle_pte_fault mm/memory.c:3346 [inline]
 [<ffffffff8143aec2>] __handle_mm_fault mm/memory.c:3474 [inline]
 [<ffffffff8143aec2>] handle_mm_fault+0x11f2/0x3140 mm/memory.c:3503
 [<ffffffff810aaa4e>] __do_page_fault+0x28e/0x7f0 arch/x86/mm/fault.c:1243
 [<ffffffff810ab008>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1306
 [<ffffffff82719e35>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:1064
Code: 82 e8 08 d1 ec ff 65 48 8b 1c 25 80 67 01 00 48 8d bb c4 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 7d e7 27 
NMI backtrace for cpu 1
CPU: 1 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #4
task: ffff8801da6c5f00 task.stack: ffff8800001c8000
RIP: 0010:[<ffffffff8109b617>]  [<ffffffff8109b617>] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:62 [inline]
RIP: 0010:[<ffffffff8109b617>]  [<ffffffff8109b617>] flat_send_IPI_mask+0xf7/0x1b0 arch/x86/kernel/apic/apic_flat_64.c:69
lowmemorykiller: Killing 'syz-executor.5' (2632) (tgid 2632), adj 1000,
   to free 34992kB on behalf of 'syz-fuzzer' (2081) because
   cache 2916kB is below limit 8192kB for oom_score_adj 1
   Free memory is 7344kB above reserved
RSP: 0000:ffff8800001cfc88  EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300
RBP: ffff8800001cfcb8 R08: 0000000000000018 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000003000000 R14: ffffffff82e5f2e0 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000043759d CR3: 00000000b9702000 CR4: 00000000001606b0
Stack:
 0000000000000001 ffffffff82e5f2e0 ffffffff831a6ac0 fffffbfff0634c34
 000000000001b6c0 0000000000000008 ffff8800001cfcd8 ffffffff81092bee
 0000000000000008 ffffffff82924260 ffff8800001cfd30 ffffffff81ab8252
Call Trace:
 [<ffffffff81092bee>] nmi_raise_cpu_backtrace+0x5e/0x80 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81ab8252>] nmi_trigger_all_cpu_backtrace.cold+0xa1/0xae lib/nmi_backtrace.c:85
 [<ffffffff81092ca4>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 [<ffffffff813b4762>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff813b4762>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff813b4762>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff813b4762>] watchdog.cold+0xd3/0xee kernel/hung_task.c:238
 [<ffffffff811342c3>] kthread+0x273/0x310 kernel/kthread.c:211
 [<ffffffff82718fc5>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537
Code: 00 c3 5f ff 80 e6 10 75 e1 41 c1 e5 18 44 89 2c 25 10 c3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 c3 5f ff <41> f7 c4 00 02 00 00 75 1e 4c 89 e7 57 9d 0f 1f 44 00 00 e8 f1 
lowmemorykiller: Killing 'syz-executor.5' (2632) (tgid 2632), adj 1000,
   to free 34992kB on behalf of 'kworker/0:0' (2539) because
   cache 2916kB is below limit 8192kB for oom_score_adj 1
   Free memory is 7344kB above reserved
lowmemorykiller: Killing 'syz-executor.5' (2632) (tgid 2632), adj 1000,
   to free 34992kB on behalf of 'rsyslogd' (1924) because
   cache 2916kB is below limit 8192kB for oom_score_adj 1
   Free memory is 7344kB above reserved
lowmemorykiller: Killing 'syz-executor.5' (2632) (tgid 2632), adj 1000,
   to free 34992kB on behalf of 'init' (1593) because
   cache 2916kB is below limit 8192kB for oom_score_adj 1
   Free memory is 7344kB above reserved
lowmemorykiller: Killing 'syz-executor.5' (2632) (tgid 2632), adj 1000,
   to free 34992kB on behalf of 'syz-fuzzer' (2081) because
   cache 2916kB is below limit 8192kB for oom_score_adj 1
   Free memory is 7344kB above reserved
lowmemorykiller: Killing 'syz-executor.5' (2632) (tgid 2632), adj 1000,
   to free 34992kB on behalf of 'kswapd0' (28) because
   cache 2768kB is below limit 8192kB for oom_score_adj 1
   Free memory is 7220kB above reserved
lowmemorykiller: Killing 'syz-executor.5' (2632) (tgid 2632), adj 1000,
   to free 34992kB on behalf of 'syz-executor.0' (2706) because
   cache 2768kB is below limit 8192kB for oom_score_adj 1
   Free memory is 7220kB above reserved
lowmemorykiller: Killing 'syz-executor.5' (2632) (tgid 2632), adj 1000,
   to free 34992kB on behalf of 'syz-fuzzer' (2077) because
   cache 2768kB is below limit 8192kB for oom_score_adj 1
   Free memory is 7220kB above reserved
lowmemorykiller: Killing 'syz-executor.5' (2632) (tgid 2632), adj 1000,
   to free 34992kB on behalf of 'init' (1555) because
   cache 2768kB is below limit 8192kB for oom_score_adj 1
   Free memory is 7220kB above reserved