Free memory is -13256kB above reserved
lowmemorykiller: Killing 'syz-executor3' (10089) (tgid 10083), adj 1000,
   to free 32948kB on behalf of 'syz-executor5' (2346) because
   cache 160kB is below limit 6144kB for oom_score_adj 0
   Free memory is -13256kB above reserved
INFO: task init:10188 blocked for more than 140 seconds.
      Not tainted 4.9.141+ #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D28888 10188      1 0x00000000
 ffff8801ce7017c0 ffff8801a873d800 ffff8801cc611600 ffff88019bac4740
 ffff8801db721018 ffff88015deef580 ffffffff828075c2 ffff8801ce702070
 000000000000015c 0000000000000000 0000000000000000 ffff8801db7218f0
Call Trace:
 [<ffffffff82808aef>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff828142d5>] schedule_timeout+0x735/0xe20 kernel/time/timer.c:1771
 [<ffffffff828108c1>] __down_common kernel/locking/semaphore.c:221 [inline]
 [<ffffffff828108c1>] __down+0x191/0x2b0 kernel/locking/semaphore.c:238
 [<ffffffff811fcbfe>] down+0x5e/0x80 kernel/locking/semaphore.c:61
 [<ffffffff812223ac>] console_lock+0x2c/0x80 kernel/printk/printk.c:2217
 [<ffffffff8122793c>] console_device+0x1c/0xc0 kernel/printk/printk.c:2554
 [<ffffffff81d2be15>] tty_lookup_driver drivers/tty/tty_io.c:2008 [inline]
 [<ffffffff81d2be15>] tty_open_by_driver drivers/tty/tty_io.c:2053 [inline]
 [<ffffffff81d2be15>] tty_open+0x6f5/0xdf0 drivers/tty/tty_io.c:2130
 [<ffffffff81517bdd>] chrdev_open+0x22d/0x5c0 fs/char_dev.c:392
 [<ffffffff81501e3f>] do_dentry_open+0x3ef/0xc90 fs/open.c:766
 [<ffffffff8150576c>] vfs_open+0x11c/0x210 fs/open.c:879
 [<ffffffff8153c542>] do_last fs/namei.c:3410 [inline]
 [<ffffffff8153c542>] path_openat+0x542/0x2790 fs/namei.c:3534
 [<ffffffff81541617>] do_filp_open+0x197/0x270 fs/namei.c:3568
 [<ffffffff8150617d>] do_sys_open+0x30d/0x5c0 fs/open.c:1072
 [<ffffffff8150645d>] SYSC_open fs/open.c:1090 [inline]
 [<ffffffff8150645d>] SyS_open+0x2d/0x40 fs/open.c:1085
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
2 locks held by khungtaskd/24:
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131c0cc>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131c0cc>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813fe63f>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/1892:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8156cc7c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/2019:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82815952>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff81d37362>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
1 lock held by init/10188:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/10189:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/10190:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/10191:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/10192:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/10193:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2bb96>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.141+ #1
 ffff8801d9907d08 ffffffff81b42e79 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810983b0 ffff8801d9907d40
 ffffffff81b4df89 0000000000000001 0000000000000000 0000000000000002
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81b4df89>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81b4df1c>] nmi_trigger_cpumask_backtrace+0x12c/0x151 lib/nmi_backtrace.c:60
 [<ffffffff810984b4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff8131c65d>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff8131c65d>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8131c65d>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8131c65d>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff81142c3d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff82817a5c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2492 Comm: syz-executor0 Not tainted 4.9.141+ #1
task: ffff8801c874df00 task.stack: ffff8801896b8000
RIP: 0010:[<ffffffff81205a66>] 
c [<ffffffff81205a66>] mark_lock+0x16/0x1290 kernel/locking/lockdep.c:3032
RSP: 0018:ffff8801db607a78  EFLAGS: 00000002
RAX: dffffc0000000000 RBX: ffff8801c874e8a0 RCX: 000000000000000c
RDX: 000000000000000c RSI: ffff8801c874e8a0 RDI: ffff8801c874df00
RBP: ffff8801db607a80 R08: ffff8801c874e8c0 R09: 0000000000000001
R10: ffff8801c874df00 R11: 1ffff100390e9d13 R12: 0000000000000069
R13: 0000000000000006 R14: 0000000000000000 R15: ffff8801c874e8c2
FS:  00007f6eb85ac700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004236d0 CR3: 00000001a09e8000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801c874e8c2
c ffff8801db607c40
c ffffffff81207a04
c 0000000000000002
c
 0000000000000007
c 0000000000000000
c ffff8801c874e8ea
c ffff8801db607c70
c
 0000000000000046
c ffff880187f01860
c dffffc0000000000
c ffff8801d1e3b000
c
Call Trace:
 <IRQ> 
d [<ffffffff81207a04>] __lock_acquire+0x654/0x4a10 kernel/locking/lockdep.c:3306
 [<ffffffff8120c8d0>] lock_acquire+0x130/0x3e0 kernel/locking/lockdep.c:3756
 [<ffffffff82816dde>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:112 [inline]
 [<ffffffff82816dde>] _raw_spin_lock_irqsave+0x4e/0x70 kernel/locking/spinlock.c:159
 [<ffffffff8117442a>] try_to_wake_up+0x8a/0xf80 kernel/sched/core.c:2045
 [<ffffffff81175330>] wake_up_process+0x10/0x20 kernel/sched/core.c:2205
 [<ffffffff81269248>] hrtimer_wakeup+0x48/0x60 kernel/time/hrtimer.c:1476
 [<ffffffff8126a197>] __run_hrtimer kernel/time/hrtimer.c:1255 [inline]
 [<ffffffff8126a197>] __hrtimer_run_queues+0x357/0xe30 kernel/time/hrtimer.c:1319
 [<ffffffff8126c681>] hrtimer_interrupt+0x1b1/0x430 kernel/time/hrtimer.c:1353
 [<ffffffff810912d4>] local_apic_timer_interrupt+0x74/0xa0 arch/x86/kernel/apic/apic.c:937
 [<ffffffff8281b76c>] smp_apic_timer_interrupt+0x7c/0xb0 arch/x86/kernel/apic/apic.c:961
 [<ffffffff8281902d>] apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:648
 <EOI> 
d [<ffffffff8141a074>] ? find_lock_task_mm+0x104/0x270 mm/oom_kill.c:116
 [<ffffffff821effdf>] lowmem_scan+0x34f/0xaf0 drivers/staging/android/lowmemorykiller.c:134
 [<ffffffff81449cc6>] do_shrink_slab mm/vmscan.c:398 [inline]
 [<ffffffff81449cc6>] shrink_slab.part.8+0x3c6/0xa00 mm/vmscan.c:501
 [<ffffffff814557fd>] shrink_slab mm/vmscan.c:465 [inline]
 [<ffffffff814557fd>] shrink_node+0x1ed/0x740 mm/vmscan.c:2602
 [<ffffffff814560c7>] shrink_zones mm/vmscan.c:2749 [inline]
 [<ffffffff814560c7>] do_try_to_free_pages mm/vmscan.c:2791 [inline]
 [<ffffffff814560c7>] try_to_free_pages+0x377/0xb80 mm/vmscan.c:3002
 [<ffffffff81428a01>] __perform_reclaim mm/page_alloc.c:3324 [inline]
 [<ffffffff81428a01>] __alloc_pages_direct_reclaim mm/page_alloc.c:3345 [inline]
 [<ffffffff81428a01>] __alloc_pages_slowpath mm/page_alloc.c:3697 [inline]
 [<ffffffff81428a01>] __alloc_pages_nodemask+0x981/0x1bd0 mm/page_alloc.c:3862
 [<ffffffff814615fc>] __alloc_pages include/linux/gfp.h:433 [inline]
 [<ffffffff814615fc>] __alloc_pages_node include/linux/gfp.h:446 [inline]
 [<ffffffff814615fc>] alloc_pages_node include/linux/gfp.h:460 [inline]
 [<ffffffff814615fc>] shmem_alloc_page mm/shmem.c:1420 [inline]
 [<ffffffff814615fc>] shmem_alloc_and_acct_page mm/shmem.c:1450 [inline]
 [<ffffffff814615fc>] shmem_getpage_gfp+0xc7c/0x18f0 mm/shmem.c:1724
 [<ffffffff81462ba4>] shmem_getpage mm/shmem.c:123 [inline]
 [<ffffffff81462ba4>] shmem_write_begin+0xf4/0x1a0 mm/shmem.c:2205
 [<ffffffff8140f5fa>] generic_perform_write+0x28a/0x500 mm/filemap.c:2753
 [<ffffffff81412542>] __generic_file_write_iter+0x352/0x540 mm/filemap.c:2878
 [<ffffffff81412aaa>] generic_file_write_iter+0x37a/0x620 mm/filemap.c:2906
 [<ffffffff815071c7>] vfs_iter_write+0x2d7/0x450 fs/read_write.c:390
 [<ffffffff815ae4fb>] iter_file_splice_write+0x5fb/0xb30 fs/splice.c:768
 [<ffffffff815a9ab8>] do_splice_from fs/splice.c:870 [inline]
 [<ffffffff815a9ab8>] direct_splice_actor+0x128/0x190 fs/splice.c:1037
 [<ffffffff815ab6c1>] splice_direct_to_actor+0x2c1/0x7e0 fs/splice.c:992
 [<ffffffff815abd83>] do_splice_direct+0x1a3/0x270 fs/splice.c:1080
 [<ffffffff8150d780>] do_sendfile+0x4f0/0xc30 fs/read_write.c:1393
 [<ffffffff8150f7f1>] SYSC_sendfile64 fs/read_write.c:1448 [inline]
 [<ffffffff8150f7f1>] SyS_sendfile64+0xd1/0x160 fs/read_write.c:1440
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82817893>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
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c