INFO: task syz-executor.0:22234 blocked for more than 143 seconds.
      Not tainted 6.4.0-syzkaller-ga507db1d8fdc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:26600 pid:22234 ppid:5056   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1873/0x48f0 kernel/sched/core.c:6710
 schedule+0xc3/0x180 kernel/sched/core.c:6786
 perf_event_free_task+0x528/0x630 kernel/events/core.c:13171
 copy_process+0x2db8/0x4290 kernel/fork.c:2780
 kernel_clone+0x222/0x800 kernel/fork.c:2911
 __do_sys_clone kernel/fork.c:3054 [inline]
 __se_sys_clone kernel/fork.c:3038 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:3038
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x4610d9
RSP: 002b:00007f58c07721a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 00000000004610d9
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0000002102001ffe
RBP: 0000000000000005 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004ea658 R14: 00000000004aba7b R15: 00007f58c07726bc
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
 #0: ffffffff8d326af0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/14:
 #0: ffffffff8d326eb0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522
1 lock held by khungtaskd/28:
 #0: ffffffff8d326920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4744:
 #0: ffff888028ea9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900015c02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1db0 drivers/tty/n_tty.c:2176

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-syzkaller-ga507db1d8fdc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xec2/0xf00 kernel/hung_task.c:379
 kthread+0x2b8/0x350 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 57 Comm: kworker/u4:4 Not tainted 6.4.0-syzkaller-ga507db1d8fdc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:debug_lockdep_rcu_enabled+0xd/0x30 kernel/rcu/update.c:319
Code: 8b 48 c7 c6 60 b1 0a 8b e8 b0 78 99 f6 0f 0b eb d0 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 31 c0 83 3d cb 1a de 03 00 <74> 1d 83 3d 2e 4e de 03 00 74 14 65 48 8b 0d 60 1e 4a 75 31 c0 83
RSP: 0018:ffffc90001597a38 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000001 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000341 RDI: ffffffff8b15a076
RBP: ffffc90001597b50 R08: ffffffff815331c9 R09: 1ffffffff1d2f60d
R10: dffffc0000000000 R11: fffffbfff1d2f60e R12: 0000000000000000
R13: ffff888013250008 R14: 0000000000000341 R15: 1ffff920002b2f50
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3101dce580 CR3: 000000000d130000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __might_resched+0x90/0x780 kernel/sched/core.c:10151
 toggle_allocation_gate+0xc6/0x250 mm/kfence/core.c:833
 process_one_work+0x92c/0x12c0 kernel/workqueue.c:2597
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2748
 kthread+0x2b8/0x350 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>