INFO: task syz-executor.1:6538 can't die for more than 143 seconds.
task:syz-executor.1  state:D stack:23920 pid: 6538 ppid:     1 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
 try_charge_memcg+0x298/0x10f0 mm/memcontrol.c:2598
 obj_cgroup_charge_pages+0x1e/0x90 mm/memcontrol.c:3018
 obj_cgroup_charge+0xf3/0x280 mm/memcontrol.c:3287
 memcg_slab_pre_alloc_hook mm/slab.h:519 [inline]
 slab_pre_alloc_hook mm/slab.h:744 [inline]
 slab_alloc_node mm/slub.c:3145 [inline]
 kmem_cache_alloc_node+0x99/0x3e0 mm/slub.c:3267
 alloc_task_struct_node kernel/fork.c:170 [inline]
 dup_task_struct kernel/fork.c:884 [inline]
 copy_process+0x5c4/0x7480 kernel/fork.c:2005
 kernel_clone+0xe7/0xab0 kernel/fork.c:2621
 __do_sys_clone+0xc1/0x100 kernel/fork.c:2738
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3b5711648b
RSP: 002b:00007ffef6e87c80 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3b5711648b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 000055555559a400
R10: 000055555559a6d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffef6e87d60
 </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/3277:
 #0: ffff888022cf2098 (&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/u4:18/16256:

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