INFO: task syz-executor.1:24005 can't die for more than 143 seconds.
task:syz-executor.1  state:D stack:27624 pid:24005 ppid:  3636 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0xab2/0x4d90 kernel/sched/core.c:6296
 schedule+0xd2/0x260 kernel/sched/core.c:6369
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
 reclaim_throttle+0x1ce/0x5e0 mm/vmscan.c:1072
 consider_reclaim_throttle mm/vmscan.c:3399 [inline]
 shrink_zones mm/vmscan.c:3486 [inline]
 do_try_to_free_pages+0x7cd/0x1620 mm/vmscan.c:3541
 try_to_free_mem_cgroup_pages+0x2cd/0x840 mm/vmscan.c:3855
 reclaim_high.constprop.0+0x190/0x250 mm/memcontrol.c:2299
 mem_cgroup_handle_over_high+0x18c/0x540 mm/memcontrol.c:2483
 tracehook_notify_resume include/linux/tracehook.h:198 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x1ab/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f58dae3cfa7
RSP: 002b:00007ffea22c39e8 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: 0000000000000000 RBX: 0000000000021000 RCX: 00007f58dae3cfa7
RDX: 0000000000000003 RSI: 0000000000020000 RDI: 00007f58d9751000
RBP: 00007ffea22c3ac0 R08: 00000000ffffffff R09: 00007f58d9770700
R10: 0000000000020022 R11: 0000000000000206 R12: 00007ffea22c3be0
R13: 00007f58d9770700 R14: 0000000000000000 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.1:24006 can't die for more than 143 seconds.
task:syz-executor.1  state:D stack:25352 pid:24006 ppid:  3636 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0xab2/0x4d90 kernel/sched/core.c:6296
 schedule+0xd2/0x260 kernel/sched/core.c:6369
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
 reclaim_throttle+0x1ce/0x5e0 mm/vmscan.c:1072
 consider_reclaim_throttle mm/vmscan.c:3399 [inline]
 shrink_zones mm/vmscan.c:3486 [inline]
 do_try_to_free_pages+0x7cd/0x1620 mm/vmscan.c:3541
 try_to_free_mem_cgroup_pages+0x2cd/0x840 mm/vmscan.c:3855
 reclaim_high.constprop.0+0x190/0x250 mm/memcontrol.c:2299
 mem_cgroup_handle_over_high+0x18c/0x540 mm/memcontrol.c:2483
 tracehook_notify_resume include/linux/tracehook.h:198 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x1ab/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f58dae3ce99
RSP: 002b:00007f58d97b2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: 0000000000080006 RBX: 00007f58daf4ff60 RCX: 00007f58dae3ce99
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00007f58dae96ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000080006 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffea22c3a4f R14: 00007f58d97b2300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.1:24028 can't die for more than 143 seconds.
task:syz-executor.1  state:D stack:25360 pid:24028 ppid:  3636 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0xab2/0x4d90 kernel/sched/core.c:6296
 schedule+0xd2/0x260 kernel/sched/core.c:6369
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
 reclaim_throttle+0x1ce/0x5e0 mm/vmscan.c:1072
 consider_reclaim_throttle mm/vmscan.c:3399 [inline]
 shrink_zones mm/vmscan.c:3486 [inline]
 do_try_to_free_pages+0x7cd/0x1620 mm/vmscan.c:3541
 try_to_free_mem_cgroup_pages+0x2cd/0x840 mm/vmscan.c:3855
 reclaim_high.constprop.0+0x190/0x250 mm/memcontrol.c:2299
 mem_cgroup_handle_over_high+0x18c/0x540 mm/memcontrol.c:2483
 tracehook_notify_resume include/linux/tracehook.h:198 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x1ab/0x290 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f58dae3ce99
RSP: 002b:00007f58d9791168 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: 0000000020000000 RBX: 00007f58daf50030 RCX: 00007f58dae3ce99
RDX: 0000000001000002 RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f58dae96ff1 R08: 0000000000000004 R09: 0000000000000000
R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffea22c3a4f R14: 00007f58d9791300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8bb818a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3281:
 #0: ffff88802323b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
2 locks held by kworker/u4:18/4383:

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