active_file:8777 inactive_file:30838 isolated_file:0
 unevictable:3 dirty:0 writeback:0 unstable:0
 slab_reclaimable:6470 slab_unreclaimable:67574
 mapped:71575 shmem:85 pagetables:19409 bounce:0
 free:1366876 free_pcp:539 free_cma:0
INFO: task syz-executor1:30743 blocked for more than 140 seconds.
      Not tainted 4.9.124+ #86
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1   D29688 30743   2186 0x00000004
 ffff8801acb0af80 ffff880194c33180 ffff8801a70eac00 ffff8801c2434740
 ffff8801db620fd8 ffff88018fd87cb8 ffffffff8277c6a2 0000000000000000
 ffff8801acb0b830 ffffed0035961705 00ff8801acb0af80 ffff8801db6218b0
Call Trace:
 [<ffffffff8277dbcf>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff8277e553>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3586
 [<ffffffff827801d6>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff827801d6>] mutex_lock_nested+0x326/0x870 kernel/locking/mutex.c:621
 [<ffffffff8154c07c>] __fdget_pos+0xac/0xd0 fs/file.c:781
 [<ffffffff814ec144>] fdget_pos include/linux/file.h:66 [inline]
 [<ffffffff814ec144>] do_writev+0x84/0x260 fs/read_write.c:938
 [<ffffffff814ef4d7>] SYSC_writev fs/read_write.c:1016 [inline]
 [<ffffffff814ef4d7>] SyS_writev+0x27/0x30 fs/read_write.c:1013
 [<ffffffff8100554f>] do_syscall_64+0x19f/0x480 arch/x86/entry/common.c:282
 [<ffffffff8278b793>] 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: [<ffffffff81309c30>] rcu_read_unlock include/linux/rcupdate.h:927 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff81309c30>] rcu_lock_break kernel/hung_task.c:143 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff81309c30>] check_hung_uninterruptible_tasks kernel/hung_task.c:177 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff81309c30>] watchdog+0x310/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813e687c>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/2029:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8154c07c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/2124:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82789872>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff81cdcd32>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
1 lock held by syz-executor1/30743:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8154c07c>] __fdget_pos+0xac/0xd0 fs/file.c:781

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

NMI backtrace for cpu 1
CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.124+ #86
 ffff8801d94a7d08 ffffffff81af03d9 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff81096730 ffff8801d94a7d40
 ffffffff81afb139 0000000000000001 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81af03d9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81af03d9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81afb139>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81afb0cc>] nmi_trigger_cpumask_backtrace+0x12c/0x151 lib/nmi_backtrace.c:60
 [<ffffffff81096834>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81309fcd>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81309fcd>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81309fcd>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81309fcd>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff8113d92d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff8278b95c>] 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: 29775 Comm: syz-executor0 Not tainted 4.9.124+ #86
task: ffff8801c2434740 task.stack: ffff8801c9598000
RIP: 0010:[<ffffffff813093f6>] 
c [<ffffffff813093f6>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff813093f6>] 
c [<ffffffff813093f6>] check_kcov_mode kernel/kcov.c:68 [inline]
RIP: 0010:[<ffffffff813093f6>] 
c [<ffffffff813093f6>] __sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:100
RSP: 0018:ffff8801c959f930  EFLAGS: 00000246
RAX: ffff8801c2434740 RBX: dffffc0000000000 RCX: 1ffff100392b3ffa
RDX: 0000000000000000 RSI: ffffffff8137fe92 RDI: ffffffff8288cc78
RBP: ffff8801c959f930 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c959fc80
R13: ffffffff8288c700 R14: ffffc900139d1028 R15: 00000000000000af
FS:  00007f2f903f2700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000631000 CR3: 00000001c6017000 CR4: 00000000001606b0
Stack:
 ffff8801c959fca8
c ffffffff8137fe92
c ffffffff811fef10
c 00000000c2434ff0
c
 1ffff100392b3f2c
c ffffffff811f42cb
c 0000000041b58ab3
c ffffffff82c320b0
c
 ffffffff8137d140
c ffff8801db618280
c 0000000000000000
c 0000000000003514
c
Call Trace:
 [<ffffffff8137fe92>] __bpf_prog_run+0x2d52/0x54b0 kernel/bpf/core.c:607
 [<ffffffff8130c05c>] seccomp_run_filters kernel/seccomp.c:200 [inline]
 [<ffffffff8130c05c>] __seccomp_filter+0x14c/0xc80 kernel/seccomp.c:589
 [<ffffffff8130e556>] __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
 [<ffffffff8278b793>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
c00 
c00 
c0f 
c1f 
c00 
c55 
c48 
c89 
ce5 
c65 
c48 
c8b 
c04 
c25 
cc0 
c7d 
c01 
c00 
c65 
c8b 
c15 
c6c 
ce9 
cd0 
c7e 
c81 
ce2 
c00 
c01 
c1f 
c00 
c48 
c8b 
c75 
c08 
c75 
c2b 
c8b 
c90 
c38 
c12 
c00 
c00 
c<83> 
cfa 
c02 
c75 
c20 
c48 
c8b 
c88 
c40 
c12 
c00 
c00 
c8b 
c80 
c3c 
c12 
c00 
c00 
c48 
c8b 
c11 
c