INFO: task kworker/1:2:54 blocked for more than 143 seconds.
      Not tainted 6.6.0-rc1-next-20230915-syzkaller-05666-gdfa449a58323 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:2     state:D stack:25904 pid:54    ppid:2      flags:0x00004000
Workqueue: events_long flush_mdb
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5365 [inline]
 __schedule+0xee1/0x5a10 kernel/sched/core.c:6677
 schedule+0xe7/0x1b0 kernel/sched/core.c:6753
 io_schedule+0xbe/0x130 kernel/sched/core.c:8953
 bit_wait_io+0x16/0xe0 kernel/sched/wait_bit.c:209
 __wait_on_bit_lock+0x112/0x1a0 kernel/sched/wait_bit.c:90
 out_of_line_wait_on_bit_lock+0xdb/0x110 kernel/sched/wait_bit.c:117
 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
 __lock_buffer+0x67/0x70 fs/buffer.c:71
 lock_buffer include/linux/buffer_head.h:406 [inline]
 hfs_mdb_commit+0xf28/0x1290 fs/hfs/mdb.c:271
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
INFO: task syz-executor.0:5400 blocked for more than 143 seconds.
      Not tainted 6.6.0-rc1-next-20230915-syzkaller-05666-gdfa449a58323 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:24272 pid:5400  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5365 [inline]
 __schedule+0xee1/0x5a10 kernel/sched/core.c:6677
 schedule+0xe7/0x1b0 kernel/sched/core.c:6753
 io_schedule+0xbe/0x130 kernel/sched/core.c:8953
 bit_wait_io+0x16/0xe0 kernel/sched/wait_bit.c:209
 __wait_on_bit_lock+0x112/0x1a0 kernel/sched/wait_bit.c:90
 out_of_line_wait_on_bit_lock+0xdb/0x110 kernel/sched/wait_bit.c:117
 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
 __lock_buffer+0x67/0x70 fs/buffer.c:71
 lock_buffer include/linux/buffer_head.h:406 [inline]
 hfs_mdb_commit+0x9a6/0x1290 fs/hfs/mdb.c:325
 hfs_sync_fs+0x15/0x20 fs/hfs/super.c:35
 sync_filesystem fs/sync.c:56 [inline]
 sync_filesystem+0x109/0x280 fs/sync.c:30
 generic_shutdown_super+0x7e/0x3c0 fs/super.c:669
 kill_block_super+0x3b/0x70 fs/super.c:1649
 deactivate_locked_super+0xbc/0x1a0 fs/super.c:484
 deactivate_super+0xde/0x100 fs/super.c:517
 cleanup_mnt+0x222/0x3d0 fs/namespace.c:1256
 task_work_run+0x14d/0x240 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x215/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f91a807dc87
RSP: 002b:00007fff1c2ecac8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f91a807dc87
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007fff1c2ecb80
RBP: 00007fff1c2ecb80 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff1c2edc40
R13: 00007f91a80d7c5a R14: 000000000001c1cc R15: 0000000000000007
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8cbaaa60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
 #0: ffffffff8cbaaa60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
 #0: ffffffff8cbaaa60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by kworker/1:2/54:
 #0: ffff888012c75538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
 #1: ffffc90000bf7d80 ((work_completion)(&(&sbi->mdb_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
2 locks held by getty/4796:
 #0: ffff88802661f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
1 lock held by syz-executor.0/5400:
 #0: ffff88807d7f00e0 (&type->s_umount_key#53){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff88807d7f00e0 (&type->s_umount_key#53){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff88807d7f00e0 (&type->s_umount_key#53){+.+.}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:516

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

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc1-next-20230915-syzkaller-05666-gdfa449a58323 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2456 Comm: kworker/u4:8 Not tainted 6.6.0-rc1-next-20230915-syzkaller-05666-gdfa449a58323 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:get_flush_tlb_info arch/x86/mm/tlb.c:987 [inline]
RIP: 0010:flush_tlb_mm_range+0x1f9/0x580 arch/x86/mm/tlb.c:1021
Code: 80 3c 02 00 0f 85 3a 03 00 00 48 8b 44 24 08 48 89 34 24 48 89 46 18 e8 55 f2 05 09 48 8b 34 24 48 ba 00 00 00 00 00 fc ff df <48> 8d 7e 20 48 89 f9 48 c1 e9 03 0f b6 14 11 84 d2 74 09 80 fa 03
RSP: 0018:ffffc9000a55f948 EFLAGS: 00000086
RAX: 0000000000000001 RBX: ffff888012c68000 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: ffff8880b993be40 RDI: ffffffff8ae93c20
RBP: 00002aaaaaaac000 R08: 0000000000000001 R09: ffffed100258d0c4
R10: ffff888012c68627 R11: 0000000000000000 R12: 00002aaaaaaab000
R13: 000000000000000c R14: 0000000000000000 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f1e5860628 CR3: 000000000c976000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __text_poke+0x5bd/0xc90 arch/x86/kernel/alternative.c:1852
 text_poke arch/x86/kernel/alternative.c:1889 [inline]
 text_poke_bp_batch+0x190/0x960 arch/x86/kernel/alternative.c:2197
 text_poke_flush arch/x86/kernel/alternative.c:2391 [inline]
 text_poke_flush arch/x86/kernel/alternative.c:2388 [inline]
 text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2398
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x32e/0x410 kernel/jump_label.c:829
 static_key_disable_cpuslocked+0x154/0x1b0 kernel/jump_label.c:235
 static_key_disable+0x1a/0x20 kernel/jump_label.c:243
 toggle_allocation_gate mm/kfence/core.c:835 [inline]
 toggle_allocation_gate+0x13f/0x250 mm/kfence/core.c:822
 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>