INFO: task kworker/u8:1:13 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:1    state:D stack:19880 pid:13    tgid:13    ppid:2      task_flags:0x4208060 flags:0x00080000
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7026
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760
 hfsplus_find_init+0x168/0x290 fs/hfsplus/bfind.c:28
 hfsplus_cat_write_inode+0x1e6/0x7a0 fs/hfsplus/inode.c:592
 write_inode fs/fs-writeback.c:1564 [inline]
 __writeback_single_inode+0x6f1/0xff0 fs/fs-writeback.c:1784
 writeback_sb_inodes+0x6c7/0x1010 fs/fs-writeback.c:2015
 wb_check_old_data_flush fs/fs-writeback.c:2301 [inline]
 wb_do_writeback fs/fs-writeback.c:2354 [inline]
 wb_workfn+0xaef/0xef0 fs/fs-writeback.c:2382
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/u8:0/12:
 #0: 
ffff88801d6ae148
 (
(wq_completion)writeback
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3238 [inline]
, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346
 #1: 
ffffc90000117ba0
 (
(work_completion)(&(&wb->dwork)->work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3239 [inline]
, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346
 #2: