INFO: task kworker/u8:4:61 is blocked on a mutex likely owned by task syz.1.18:6520.
task:syz.1.18        state:R  running task     stack:24248 pid:6520  tgid:6519  ppid:6496   task_flags:0x400140 flags:0x00080003
 </TASK>
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:5    state:D stack:23368 pid:130   tgid:130   ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: writeback wb_workfn (flush-7:0)
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x149b/0x4fb0 kernel/sched/core.c:6863
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
 __mutex_lock_common kernel/locking/mutex.c:692 [inline]
 __mutex_lock+0x6f6/0x1490 kernel/locking/mutex.c:776
 hfsplus_find_init+0x168/0x2d0 fs/hfsplus/bfind.c:28
 write_inode fs/fs-writeback.c:1582 [inline]
 __writeback_single_inode+0x786/0x11c0 fs/fs-writeback.c:1802
 worker_thread+0xa57/0xfc0 kernel/workqueue.c:3421
 ret_from_fork+0x50c/0xa50 arch/x86/kernel/process.c:158
 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234
 path_setxattrat+0x364/0x3a0 fs/xattr.c:713
 __do_sys_lsetxattr fs/xattr.c:754 [inline]
 __se_sys_lsetxattr fs/xattr.c:750 [inline]
 __x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:750
RSP: 002b:00007f1fd0dfe038 EFLAGS: 00000246
 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f1fd19e5fa0 RCX: 00007f1fd178f749
RDX: 00002000000001c0 RSI: 0000200000000180 RDI: 00002000000001c0
R13: 00007f1fd19e6038 R14: 00007f1fd19e5fa0 R15: 00007ffeceddc4f8

Showing all locks held in the system:
4 locks held by kworker/u8:1/13:
 #0: 
ffff88801e2b7948
 (
){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3232 [inline]
){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1760 kernel/workqueue.c:3340
 #1: ffffc90000127ba0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3233 [inline]
 #1: ffffc90000127ba0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1760 kernel/workqueue.c:3340
 #2: ffff88807f22e0e0 (&type->s_umount_key#54){.+.+}-{4:4}, at: super_trylock_shared+0x20/0xf0 fs/super.c:563
 #3: ffff88807ba000b0 (&tree->tree_lock){+.+.}-{4:4}, at: hfsplus_find_init+0x168/0x2d0 fs/hfsplus/bfind.c:28
, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
4 locks held by kworker/u8:2/36: