INFO: task syz.2.37:6179 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.37        state:D stack:28680 pid:6179  tgid:6168  ppid:5855   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write_nested+0x1b5/0x200
 filename_create+0x1f8/0x3c0
 do_mknodat+0x184/0x4d0
 __x64_sys_mknod+0x8c/0xa0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0144f8ebe9
RSP: 002b:00007f0145db4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007f01451c6090 RCX: 00007f0144f8ebe9
RDX: 0000000000000000 RSI: 0000000000001ffa RDI: 0000200000000280
RBP: 00007f0145011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f01451c6128 R14: 00007f01451c6090 R15: 00007ffe84d9ba18
 </TASK>
INFO: task syz.2.37:6180 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.37        state:D stack:28936 pid:6180  tgid:6168  ppid:5855   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write_nested+0x1b5/0x200
 filename_create+0x1f8/0x3c0
 do_mkdirat+0xa0/0x590
 __x64_sys_mkdirat+0x87/0xa0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0144f8d457
RSP: 002b:00007f0145d92e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f0145d92ef0 RCX: 00007f0144f8d457
RDX: 00000000000001ff RSI: 0000200000000280 RDI: 00000000ffffff9c
RBP: 00002000000002c0 R08: 0000200000000080 R09: 0000000000000000
R10: 00002000000002c0 R11: 0000000000000246 R12: 0000200000000280
R13: 00007f0145d92eb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
4 locks held by kworker/u10:0/27:
 #0: ffff888100746948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000060fbc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff888032f0c0e0 (&type->s_umount_key#87){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0
 #3: ffff88802b52c250 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530
1 lock held by khungtaskd/34:
 #0: ffffffff8e139f20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by kworker/u9:3/798:
 #0: ffff88804b039f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
 #1: ffff88804b024008 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
2 locks held by getty/5676:
 #0: ffff88801eb2f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
3 locks held by syz-executor/5849:
4 locks held by syz.2.37/6169:
2 locks held by syz.2.37/6179:
 #0: ffff888032f0c428 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88802b52c600 (&type->i_mutex_dir_key#20/1){+.+.}-{4:4}, at: filename_create+0x1f8/0x3c0
2 locks held by syz.2.37/6180:
 #0: ffff888032f0c428 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88802b52c600 (&type->i_mutex_dir_key#20/1){+.+.}-{4:4}, at: filename_create+0x1f8/0x3c0
1 lock held by syz.5.73/6514:
 #0: ffff8880324a20e0 (&type->s_umount_key#86){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.5.73/6515:
 #0: ffff8880324a20e0 (&type->s_umount_key#86){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.5.73/6516:
 #0: ffff8880324a20e0 (&type->s_umount_key#86){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.2.350/8358:
 #0: ffff888032f0c0e0 (&type->s_umount_key#87){++++}-{4:4}, at: super_lock+0x25c/0x3b0
1 lock held by syz.2.350/8362:
 #0: ffff888032f0c0e0 (&type->s_umount_key#87){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.2.350/8363:
 #0: ffff888032f0c0e0 (&type->s_umount_key#87){++++}-{4:4}, at: super_lock+0x2a9/0x3b0
1 lock held by syz.4.351/8368:
 #0: ffffffff8e13f9b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
2 locks held by syz.4.351/8386:
 #0: ffff88810bd7e0e0 (&type->s_umount_key#70){+.+.}-{4:4}, at: path_mount+0xcd2/0xfe0
 #1: ffff888125d00278 (&c->state_lock){++++}-{4:4}, at: bch2_fs_reconfigure+0x17e/0x400
1 lock held by syz.4.351/8387:
 #0: ffff8880324a20e0 (&type->s_umount_key#86){++++}-{4:4}, at: super_lock+0x2a9/0x3b0

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8382 Comm: syz.1.352 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0033:0x7fa2ef650c46
Code: f0 72 6e 48 63 cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 <47> 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01
RSP: 002b:00007fa2f05684a0 EFLAGS: 00010206
RAX: 00000000001e0001 RBX: 00007fa2f0568540 RCX: 000000000000005a
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007fa2f05685e0
RBP: 0000000000000102 R08: 00007fa2e5400000 R09: 00000000001e0000
R10: 0000000000000000 R11: 00007fa2f0568550 R12: 0000000000000001
R13: 00007fa2ef82da20 R14: 0000000000000000 R15: 00007fa2f05685e0
FS:  00007fa2f05696c0 GS:  0000000000000000
