============================================
WARNING: possible recursive locking detected
6.2.0-rc4-syzkaller-16807-gedb2f0dc90f2 #0 Not tainted
--------------------------------------------
kworker/u4:3/103 is trying to acquire lock:
ffff0000c7f8c0b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfs_find_init+0xac/0xcc

but task is already holding lock:
ffff0000c7f8c0b0 (&tree->tree_lock/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/1);
  lock(&tree->tree_lock/1);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

4 locks held by kworker/u4:3/103:
 #0: ffff0000c0250138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262
 #1: ffff80000f90bd80 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264
 #2: ffff0000c7f8c0b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfs_find_init+0xac/0xcc
 #3: ffff0000cc2500f8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0x54/0x740 fs/hfs/extent.c:397

stack backtrace:
CPU: 1 PID: 103 Comm: kworker/u4:3 Not tainted 6.2.0-rc4-syzkaller-16807-gedb2f0dc90f2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: writeback wb_workfn (flush-7:0)
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:163
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 __lock_acquire+0x808/0x3084
 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668
 __mutex_lock_common+0xd4/0xca8 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+0x120/0x740 fs/hfs/extent.c:401
 hfs_bmap_reserve+0x44/0xe8 fs/hfs/btree.c:234
 __hfs_ext_write_extent+0xb8/0x138 fs/hfs/extent.c:121
 hfs_ext_write_extent+0x9c/0xd8 fs/hfs/extent.c:144
 hfs_write_inode+0x68/0x478 fs/hfs/inode.c:431
 write_inode fs/fs-writeback.c:1451 [inline]
 __writeback_single_inode+0x240/0x2e4 fs/fs-writeback.c:1663
 writeback_sb_inodes+0x308/0x678 fs/fs-writeback.c:1889
 wb_writeback+0x198/0x328 fs/fs-writeback.c:2063
 wb_do_writeback+0xc8/0x384 fs/fs-writeback.c:2206
 wb_workfn+0x70/0x15c fs/fs-writeback.c:2246
 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289
 worker_thread+0x340/0x610 kernel/workqueue.c:2436
 kthread+0x12c/0x158 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863