INFO: task kworker/1:0:23 blocked for more than 143 seconds.
      Not tainted 6.6.0-rc1-syzkaller-00196-g57d88e8a5974 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0     state:D stack:23288 pid:23    ppid:2      flags:0x00004000
Workqueue: events_long flush_old_commits

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x18bd/0x4910 kernel/sched/core.c:6695
 schedule+0xbf/0x180 kernel/sched/core.c:6771
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6830
 __mutex_lock_common+0xe2b/0x2520 kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
 reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27
 reiserfs_sync_fs fs/reiserfs/super.c:76 [inline]
 flush_old_commits+0x1df/0x2e0 fs/reiserfs/super.c:111
 process_one_work+0x775/0x1110 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0xabb/0x1060 kernel/workqueue.c:2784
 kthread+0x2b0/0x340 kernel/kthread.c:388
 ret_from_fork+0x44/0x70 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/1:0/23:
 #0: ffff888012871538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x64d/0x1110
 #1: ffffc900001d7d20 (
(work_completion)(&(&sbi->old_work)->work)
){+.+.}-{0:0}
, at: process_one_work+0x686/0x1110 kernel/workqueue.c:2605
 #2: ffff8880277840e0 (&type->s_umount_key
#26
){++++}-{3:3}
, at: flush_old_commits+0xc7/0x2e0 fs/reiserfs/super.c:97
 #3: ffff88806a05d090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27
1 lock held by khungtaskd/29:
 #0: ffffffff8d32a960 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
4 locks held by klogd/4482:
 #0: ffff8880b983b2d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:558
 #1: ffff8880b98277c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x43d/0x770 kernel/sched/psi.c:999
 #2: ffff88807ed827c0 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:518 [inline]
 #2: ffff88807ed827c0 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xae/0x12e0 kernel/sched/core.c:4230
 #3: ffff8880b983b2d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:558
2 locks held by getty/4796:
 #0: ffff88802a3ea0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900015c02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ad/0x1db0 drivers/tty/n_tty.c:2206
4 locks held by syz-executor.0/5454:
4 locks held by syz-executor.0/6022:

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

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc1-syzkaller-00196-g57d88e8a5974 #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+0x1e3/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x494/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x194/0x2f0 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+0xded/0xe30 kernel/hung_task.c:379
 kthread+0x2b0/0x340 kernel/kthread.c:388
 ret_from_fork+0x44/0x70 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5454 Comm: syz-executor.0 Not tainted 6.6.0-rc1-syzkaller-00196-g57d88e8a5974 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:preempt_count_add+0x0/0x180 kernel/sched/core.c:5834
Code: 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 7c 97 48 8b 3c 24 e8 a3 4d 89 00 eb 8c e9 f2 fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 <41> 57 41 56 53 89 fb 48 c7 c0 20 93 ee 91 48 c1 e8 03 49 bf 00 00
RSP: 0018:ffffc90004fde7d0 EFLAGS: 00000082
RAX: 0000000080000002 RBX: 0000007c13363046 RCX: 0000000000000003
RDX: 000000000000007c RSI: ffffffff8b5f0ce0 RDI: 0000000000000001
RBP: 00000000000002c2 R08: ffffffff84c7b08e R09: 1ffff1100392c046
R10: dffffc0000000000 R11: ffffed100392c047 R12: dffffc0000000000
R13: 00000000000026cc R14: 0000000000000899 R15: 0000000000000000
FS:  00007f3a153676c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020d3a000 CR3: 000000001bcfc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 delay_tsc+0x62/0xd0 arch/x86/lib/delay.c:79
 wait_for_lsr drivers/tty/serial/8250/8250_port.c:2092 [inline]
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3371 [inline]
 serial8250_console_write+0x10c2/0x1810 drivers/tty/serial/8250/8250_port.c:3449
 console_emit_next_record kernel/printk/printk.c:2910 [inline]
 console_flush_all+0x756/0xd50 kernel/printk/printk.c:2966
 console_unlock+0x137/0x4c0 kernel/printk/printk.c:3035
 vprintk_emit+0xd6/0x1f0 kernel/printk/printk.c:2307
 _printk+0xd1/0x120 kernel/printk/printk.c:2332
 __reiserfs_warning+0x14f/0x1a0 fs/reiserfs/prints.c:290
 reiserfs_read_bitmap_block+0x232/0x6c0 fs/reiserfs/bitmap.c:1434
 scan_bitmap_block+0x19d/0xfe0 fs/reiserfs/bitmap.c:164
 scan_bitmap fs/reiserfs/bitmap.c:402 [inline]
 allocate_without_wrapping_disk fs/reiserfs/bitmap.c:1161 [inline]
 blocknrs_and_prealloc_arrays_from_search_start fs/reiserfs/bitmap.c:1274 [inline]
 reiserfs_allocate_blocknrs+0x2cf5/0x5070 fs/reiserfs/bitmap.c:1375
 reiserfs_get_block+0x327c/0x5120 fs/reiserfs/inode.c:756
 __block_write_begin_int+0x551/0x1a20 fs/buffer.c:2107
 reiserfs_write_begin+0x249/0x510 fs/reiserfs/inode.c:2771
 generic_perform_write+0x317/0x630 mm/filemap.c:3942
 generic_file_write_iter+0xab/0x310 mm/filemap.c:4063
 call_write_iter include/linux/fs.h:1985 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x77e/0xaf0 fs/read_write.c:584
 ksys_write+0x19c/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3a1467cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3a153670c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3a1479bf80 RCX: 00007f3a1467cae9
RDX: 000000000208e24b RSI: 0000000020000280 RDI: 0000000000000005
RBP: 00007f3a146c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f3a1479bf80 R15: 00007ffdc49896e8
 </TASK>