INFO: task kworker/u10:2:47 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u10:2   state:D stack:21400 pid:47    tgid:47    ppid:2      task_flags:0x4208160 flags:0x00080000
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7bf/0x1550
 hfsplus_write_inode+0x505/0x700
 __writeback_single_inode+0x6ac/0xf90
 writeback_sb_inodes+0x9de/0x1b00
 __writeback_inodes_wb+0x114/0x240
 wb_writeback+0x42f/0xad0
 wb_workfn+0xc92/0x10f0
 process_scheduled_works+0xa8e/0x14e0
 worker_thread+0xa47/0xfb0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: 
ffffffff8eb59c60
 (rcu_read_lock){....}-{1:3}
, at: debug_show_all_locks+0x2e/0x180
4 locks held by kworker/u10:2/47:
 #0: 
ffff8881622f7940
 (
(wq_completion)writeback
){+.+.}-{0:0}
, at: process_scheduled_works+0xa20/0x14e0
 #1: 
ffffc90000b77c40
 (
(work_completion)(&(&wb->dwork)->work)
){+.+.}-{0:0}
, at: process_scheduled_works+0xa20/0x14e0
 #2: 
ffff88810ed2e0d8
 (
&type->s_umount_key
#79
){++++}-{4:4}
, at: super_trylock_shared+0x20/0xf0
 #3: 
ffff8881120060a8
 (
&tree->tree_lock
){+.+.}-{4:4}
, at: hfsplus_write_inode+0x505/0x700
2 locks held by getty/5462:
 #0: ffff8881776590a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: 
ffffc900034832e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
9 locks held by syz.0.1449/9773:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x380
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 9773 Comm: syz.0.1449 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:io_serial_out+0x7c/0xc0
Code: 6d 5e fc 44 89 f9 d3 e5 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 9c 69 cc fc 41 03 2e 89 d8 89 ea ee <5b> 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 f9 80 e1 07 38 c1
RSP: 0018:ffffc9000582efb0 EFLAGS: 00000002
RAX: 000000000000005b RBX: 000000000000005b RCX: 0000000000000000
RDX: 00000000000003f8 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 00000000000003f8 R08: ffff888107288237 R09: 1ffff11020e51046
R10: dffffc0000000000 R11: ffffffff85687da0 R12: dffffc0000000000
R13: ffffffff9aae2680 R14: ffffffff9aae26c0 R15: 0000000000000000
FS:  00007f316adf66c0(0000) GS:ffff8882a8f49000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2ebe3f14b8 CR3: 000000010ec2c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 serial8250_console_write+0x13b6/0x1ba0
 console_flush_all+0x6ea/0xaf0
 console_unlock+0xd1/0x1c0
 vprintk_emit+0x485/0x560
 _printk+0xdd/0x130
 hfsplus_bnode_dump+0x189/0xa40
 hfsplus_brec_remove+0x5ea/0x6d0
 __hfsplus_delete_attr+0x1de/0x420
 hfsplus_delete_all_attrs+0x1c3/0x350
 hfsplus_delete_cat+0x8f2/0xdc0
 hfsplus_unlink+0x358/0x8e0
 hfsplus_rename+0xd5/0x280
 vfs_rename+0xbd9/0xef0
 filename_renameat2+0x533/0x9a0
 __se_sys_rename+0x55/0x2c0
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f316cb9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f316adf6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f316ce25fa0 RCX: 00007f316cb9e0d9
RDX: 0000000000000000 RSI: 0000200000000140 RDI: 0000200000000000
RBP: 00007f316cc35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f316ce26038 R14: 00007f316ce25fa0 R15: 00007ffd8c5bcd88
 </TASK>
