slab_reclaimable:5978 slab_unreclaimable:65612
 mapped:71666 shmem:16566 pagetables:8840 bounce:0
 free:1391333 free_pcp:336 free_cma:0
Node 0 active_anon:236060kB inactive_anon:23436kB active_file:63312kB inactive_file:62396kB unevictable:12kB isolated(anon):0kB isolated(file):0kB mapped:286672kB dirty:44kB writeback:0kB shmem:66264kB writeback_tmp:0kB unstable:0kB pages_scanned:0 all_unreclaimable? no
INFO: task syz-executor3:19224 blocked for more than 140 seconds.
      Not tainted 4.9.125+ #89
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor3   D28832 19224   2092 0x00000004
 ffff8801a2b64740 ffff8801d3f37380 ffff8801a9362100 ffff88018198df00
 ffff8801db721018 ffff8801a68af978 ffffffff8277d092 0000000000000002
 ffff8801a2b64ff0 ffffed003456c9fd 00ff8801a2b64740 ffff8801db7218f0
Call Trace:
 [<ffffffff8277e5bf>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff8277ef43>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3586
 [<ffffffff82780bc6>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff82780bc6>] mutex_lock_nested+0x326/0x870 kernel/locking/mutex.c:621
 [<ffffffff819c567a>] sel_write_load+0xba/0xfa0 security/selinux/selinuxfs.c:498
 [<ffffffff814e84e5>] __vfs_write+0x115/0x580 fs/read_write.c:507
 [<ffffffff814eaff7>] vfs_write+0x187/0x520 fs/read_write.c:557
 [<ffffffff814eee29>] SYSC_write fs/read_write.c:604 [inline]
 [<ffffffff814eee29>] SyS_write+0xd9/0x1c0 fs/read_write.c:596
 [<ffffffff8100554f>] do_syscall_64+0x19f/0x480 arch/x86/entry/common.c:282
 [<ffffffff8278c193>] 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: [<ffffffff81309abc>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff81309abc>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813e68fc>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/1898:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8154c11c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/2025:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff8278a262>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff81cdd442>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
3 locks held by syz-executor3/19224:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8154c11c>] __fdget_pos+0xac/0xd0 fs/file.c:781
 #1:  (sb_writers#3){.+.+.+}, at: [<ffffffff814eb25b>] file_start_write include/linux/fs.h:2640 [inline]
 #1:  (sb_writers#3){.+.+.+}, at: [<ffffffff814eb25b>] vfs_write+0x3eb/0x520 fs/read_write.c:556
 #2:  (sel_mutex){+.+.+.}, at: [<ffffffff819c567a>] sel_write_load+0xba/0xfa0 security/selinux/selinuxfs.c:498

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

NMI backtrace for cpu 1
CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.125+ #89
 ffff8801d9907d08 ffffffff81af0ae9 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810967d0 ffff8801d9907d40
 ffffffff81afb849 0000000000000001 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81af0ae9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81af0ae9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81afb849>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81afb7dc>] nmi_trigger_cpumask_backtrace+0x12c/0x151 lib/nmi_backtrace.c:60
 [<ffffffff810968d4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff8130a04d>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff8130a04d>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8130a04d>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8130a04d>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff8113d9ad>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff8278c35c>] 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: 17697 Comm: syz-executor5 Not tainted 4.9.125+ #89
task: ffff8801d53a97c0 task.stack: ffff8801a28f8000
RIP: 0010:[<ffffffff8130946a>] 
c [<ffffffff8130946a>] check_kcov_mode kernel/kcov.c:66 [inline]
RIP: 0010:[<ffffffff8130946a>] 
c [<ffffffff8130946a>] __sanitizer_cov_trace_pc+0x1a/0x50 kernel/kcov.c:100
RSP: 0018:ffff8801a28ff930  EFLAGS: 00000246
RAX: ffff8801d53a97c0 RBX: dffffc0000000000 RCX: 1ffff1003451fffa
RDX: 0000000000000000 RSI: ffffffff8137d25b RDI: ffff8801a28ffe48
RBP: ffff8801a28ff930 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801a28ffc80
R13: ffffffff8288c8c0 R14: ffffc90002ef5028 R15: ffff8801a28ffe48
FS:  00007f9ea359e700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff5f932b000 CR3: 00000001c61b6000 CR4: 00000000001606b0
Stack:
 ffff8801a28ffca8
c ffffffff8137d283
c ffff8801d53aa060
c 00000000d53aa090
c
 1ffff1003451ff2c
c ffff8801d53aa070
c 0000000041b58ab3
c ffffffff82c323b0
c
 ffffffff8137d1c0
c ffffffff82c30a48
c ffffffff811fef90
c 0000000000003c3f
c
Call Trace:
 [<ffffffff8137d283>] __bpf_prog_run+0xc3/0x54b0 kernel/bpf/core.c:584
 [<ffffffff8130c0dc>] seccomp_run_filters kernel/seccomp.c:200 [inline]
 [<ffffffff8130c0dc>] __seccomp_filter+0x14c/0xc80 kernel/seccomp.c:589
 [<ffffffff8130e5d6>] __secure_computing+0xa6/0x290 kernel/seccomp.c:692
 [<ffffffff81004940>] syscall_trace_enter+0x550/0xd20 arch/x86/entry/common.c:117
 [<ffffffff8100566c>] do_syscall_64+0x2bc/0x480 arch/x86/entry/common.c:273
 [<ffffffff8278c193>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
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c00 
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c<48> 
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c00 
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c40 
c