INFO: task kcompactd0:31 blocked for more than 143 seconds.
      Not tainted 5.19.0-rc4-next-20220628-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0      state:D stack:27888 pid:   31 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5184 [inline]
 __schedule+0xa09/0x4f10 kernel/sched/core.c:6496
 schedule+0xd2/0x1f0 kernel/sched/core.c:6568
 io_schedule+0xba/0x130 kernel/sched/core.c:8683
 folio_wait_bit_common+0x4f2/0xa80 mm/filemap.c:1298
 lock_page include/linux/pagemap.h:960 [inline]
 __unmap_and_move mm/migrate.c:1013 [inline]
 unmap_and_move mm/migrate.c:1166 [inline]
 migrate_pages+0xc62/0x5980 mm/migrate.c:1445
 compact_zone+0x1ac4/0x3750 mm/compaction.c:2432
 proactive_compact_node+0x103/0x1c0 mm/compaction.c:2684
 kcompactd+0x5af/0xf20 mm/compaction.c:2994
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8bd864f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8bd861f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
 #0: ffffffff8bd87040 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
2 locks held by getty/3286:
 #0: ffff88807eb48098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc90002d162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2177
3 locks held by kworker/u4:17/10987:
1 lock held by syz-executor.4/26300:
1 lock held by syz-executor.4/26389:
1 lock held by syz-executor.4/26437:
1 lock held by syz-executor.4/26501:
1 lock held by syz-executor.4/26555:
1 lock held by syz-executor.4/26627:
1 lock held by syz-executor.4/26693:
1 lock held by syz-executor.4/26744:
1 lock held by syz-executor.4/26808:
1 lock held by syz-executor.4/27097:
1 lock held by syz-executor.4/27164:
1 lock held by syz-executor.4/27232:

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.19.0-rc4-next-20220628-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xc18/0xf50 kernel/hung_task.c:369
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10987 Comm: kworker/u4:17 Not tainted 5.19.0-rc4-next-20220628-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_preemption_disabled+0x2/0x170 lib/smp_processor_id.c:13
Code: 8b 1d 4e 3a 89 76 31 ff 89 de 0f 1f 44 00 00 85 db 74 07 0f 1f 44 00 00 0f 0b 0f 1f 44 00 00 5b e9 93 fb ff ff cc cc cc 41 56 <41> 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 ad
RSP: 0018:ffffc900142af9a0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff89cc8940 RDI: ffffffff8a2874e0
RBP: ffff8880b9a39f18 R08: ffff8880b9a3a948 R09: ffffffff8dbcf6d7
R10: fffffbfff1b79eda R11: 0000000000000009 R12: ffff88801b661d40
R13: 00000000ffffffff R14: 00000000ffffffff R15: ffff88801b661d40
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555644b848 CR3: 000000000ba8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lockdep_recursion_inc kernel/locking/lockdep.c:461 [inline]
 lock_is_held_type+0x63/0x140 kernel/locking/lockdep.c:5707
 lock_is_held include/linux/lockdep.h:279 [inline]
 lockdep_assert_rq_held kernel/sched/sched.h:1296 [inline]
 rq_clock kernel/sched/sched.h:1451 [inline]
 sched_info_arrive kernel/sched/stats.h:239 [inline]
 sched_info_switch kernel/sched/stats.h:295 [inline]
 prepare_task_switch kernel/sched/core.c:4993 [inline]
 context_switch kernel/sched/core.c:5136 [inline]
 __schedule+0x2d9e/0x4f10 kernel/sched/core.c:6496
 schedule+0xd2/0x1f0 kernel/sched/core.c:6568
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935
 toggle_allocation_gate mm/kfence/core.c:818 [inline]
 toggle_allocation_gate+0x305/0x390 mm/kfence/core.c:803
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
 </TASK>