============================================
WARNING: possible recursive locking detected
6.2.0-rc7-syzkaller-17891-geaed33698e35 #0 Not tainted
--------------------------------------------
kworker/u4:2/39 is trying to acquire lock:
ffff000119d610b0 (&tree->tree_lock#2/1){+.+.}-{3:3}
, at: hfs_find_init+0xac/0xcc

but task is already holding lock:
ffff000119d610b0 (&tree->tree_lock#2/1){+.+.}-{3:3}, at: hfs_find_init+0xac/0xcc

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&tree->tree_lock#2/1);
  lock(&tree->tree_lock#2/1);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

4 locks held by kworker/u4:2/39:
 #0: ffff0000c0d40138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x274/0x9d0 kernel/workqueue.c:2262
 #1: ffff80000f6b3d80 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x2a0/0x9d0 kernel/workqueue.c:2264
 #2: ffff000119d610b0 (&tree->tree_lock#2/1){+.+.}-{3:3}, at: hfs_find_init+0xac/0xcc
 #3: ffff000119c406f8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0x50/0x730 fs/hfs/extent.c:397

stack backtrace:
CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted 6.2.0-rc7-syzkaller-17891-geaed33698e35 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Workqueue: writeback wb_workfn (flush-7:4)
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 dump_stack+0x1c/0x28 lib/dump_stack.c:113
 __lock_acquire+0x808/0x2f48
 lock_acquire+0x164/0x334 kernel/locking/lockdep.c:5668
 __mutex_lock_common+0xd4/0xf64 kernel/locking/mutex.c:603
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
 hfs_find_init+0xac/0xcc
 hfs_ext_read_extent fs/hfs/extent.c:200 [inline]
 hfs_extend_file+0x118/0x730 fs/hfs/extent.c:401
 hfs_bmap_reserve+0x44/0xe8 fs/hfs/btree.c:234
 __hfs_ext_write_extent+0xbc/0x140 fs/hfs/extent.c:121
 hfs_ext_write_extent+0x9c/0xd8 fs/hfs/extent.c:144
 hfs_write_inode+0x68/0x474 fs/hfs/inode.c:431
 write_inode fs/fs-writeback.c:1451 [inline]
 __writeback_single_inode+0x530/0xeb8 fs/fs-writeback.c:1663
 writeback_sb_inodes+0x410/0x8bc fs/fs-writeback.c:1889
 wb_writeback+0x260/0xa10 fs/fs-writeback.c:2063
 wb_do_writeback fs/fs-writeback.c:2206 [inline]
 wb_workfn+0x200/0x85c fs/fs-writeback.c:2246
 process_one_work+0x3ac/0x9d0 kernel/workqueue.c:2289
 worker_thread+0x340/0x608 kernel/workqueue.c:2436
 kthread+0x12c/0x158 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870