option from the mount to silence this warning.
=======================================================
============================================
WARNING: possible recursive locking detected
6.4.0-rc5-syzkaller-00305-g022ce8862dff #0 Not tainted
--------------------------------------------
syz-executor370/4992 is trying to acquire lock:
ffff888016768108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x1d6/0x1b10 fs/hfsplus/extents.c:457

but task is already holding lock:
ffff88801676a988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x1d6/0x1b10 fs/hfsplus/extents.c:457

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

       CPU0
       ----
  lock(&HFSPLUS_I(inode)->extents_lock);
  lock(&HFSPLUS_I(inode)->extents_lock);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

4 locks held by syz-executor370/4992:
 #0: ffff88807e288460 (sb_writers#9){.+.+}-{0:0}, at: do_sys_ftruncate+0x24c/0x380 fs/open.c:191
 #1: ffff88801676ab80 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline]
 #1: ffff88801676ab80 (&sb->s_type->i_mutex_key#14){+.+.}-{3:3}, at: do_truncate+0x20c/0x300 fs/open.c:64
 #2: ffff88801676a988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x1d6/0x1b10 fs/hfsplus/extents.c:457
 #3: ffff88807e28a0b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x14a/0x1c0

stack backtrace:
CPU: 0 PID: 4992 Comm: syz-executor370 Not tainted 6.4.0-rc5-syzkaller-00305-g022ce8862dff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 print_deadlock_bug kernel/locking/lockdep.c:3006 [inline]
 check_deadlock kernel/locking/lockdep.c:3049 [inline]
 validate_chain+0x473a/0x58f0 kernel/locking/lockdep.c:3834
 __lock_acquire+0x1316/0x2070 kernel/locking/lockdep.c:5088
 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5705
 __mutex_lock_common+0x1d8/0x2530 kernel/locking/mutex.c:603
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
 hfsplus_file_extend+0x1d6/0x1b10 fs/hfsplus/extents.c:457
 hfsplus_bmap_reserve+0x105/0x4e0 fs/hfsplus/btree.c:358
 __hfsplus_ext_write_extent+0x2a4/0x5b0 fs/hfsplus/extents.c:104
 __hfsplus_ext_cache_extent+0x84/0xe00 fs/hfsplus/extents.c:186
 hfsplus_ext_read_extent fs/hfsplus/extents.c:218 [inline]
 hfsplus_file_extend+0x439/0x1b10 fs/hfsplus/extents.c:461
 hfsplus_get_block+0x406/0x14e0 fs/hfsplus/extents.c:245
 __block_write_begin_int+0x548/0x1a50 fs/buffer.c:2064
 __block_write_begin fs/buffer.c:2114 [inline]
 block_write_begin+0x9c/0x1f0 fs/buffer.c:2175
 cont_write_begin+0x643/0x880 fs/buffer.c:2534
 hfsplus_write_begin+0x8a/0xd0 fs/hfsplus/inode.c:52
 cont_expand_zero fs/buffer.c:2461 [inline]
 cont_write_begin+0x316/0x880 fs/buffer.c:2524
 hfsplus_write_begin+0x8a/0xd0 fs/hfsplus/inode.c:52
 generic_cont_expand_simple+0x18b/0x2a0 fs/buffer.c:2425
 hfsplus_setattr+0x16d/0x280 fs/hfsplus/inode.c:263
 notify_change+0xc8b/0xf40 fs/attr.c:483
 do_truncate+0x220/0x300 fs/open.c:66
 do_sys_ftruncate+0x2e4/0x380 fs/open.c:194
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3f5403c7a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdb7ecc478 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3f5403c7a9
RDX: 0000000000000000 RSI: 0000000002007ffb RDI: 0000000000000004
RBP: 00007f3f