============================================
WARNING: possible recursive locking detected
6.5.0-rc4-syzkaller #0 Not tainted
--------------------------------------------
syz-executor874/5021 is trying to acquire lock:
ffff888079fbd588 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x1c5/0xf90 fs/hfsplus/extents.c:457

but task is already holding lock:
ffff88802988e848 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x1c5/0xf90 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-executor874/5021:
 #0: ffff88801f5f8410 (sb_writers#10){.+.+}-{0:0}, at: do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 #0: ffff88801f5f8410 (sb_writers#10){.+.+}-{0:0}, at: do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 #1: ffff88802988ea40 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
 #1: ffff88802988ea40 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: do_truncate+0x14b/0x220 fs/open.c:64
 #2: ffff88802988e848 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x1c5/0xf90 fs/hfsplus/extents.c:457
 #3: ffff88801f3d40b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x16d/0x200 fs/hfsplus/bfind.c:33

stack backtrace:
CPU: 1 PID: 5021 Comm: syz-executor874 Not tainted 6.5.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 check_deadlock kernel/locking/lockdep.c:3070 [inline]
 validate_chain kernel/locking/lockdep.c:3863 [inline]
 __lock_acquire+0x2971/0x5de0 kernel/locking/lockdep.c:5144
 lock_acquire kernel/locking/lockdep.c:5761 [inline]
 lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5726
 __mutex_lock_common kernel/locking/mutex.c:603 [inline]
 __mutex_lock+0x181/0x1340 kernel/locking/mutex.c:747
 hfsplus_file_extend+0x1c5/0xf90 fs/hfsplus/extents.c:457
 hfsplus_bmap_reserve+0x318/0x410 fs/hfsplus/btree.c:358
 __hfsplus_ext_write_extent+0x470/0x5e0 fs/hfsplus/extents.c:104
 __hfsplus_ext_cache_extent fs/hfsplus/extents.c:186 [inline]
 hfsplus_ext_read_extent+0x84c/0xb00 fs/hfsplus/extents.c:218
 hfsplus_file_extend+0x699/0xf90 fs/hfsplus/extents.c:461
 hfsplus_get_block+0x1ae/0x9e0 fs/hfsplus/extents.c:245
 __block_write_begin_int+0x3c0/0x1470 fs/buffer.c:2128
 __block_write_begin fs/buffer.c:2178 [inline]
 block_write_begin+0xb1/0x490 fs/buffer.c:2239
 cont_write_begin+0x52f/0x730 fs/buffer.c:2597
 hfsplus_write_begin+0x87/0x140 fs/hfsplus/inode.c:52
 cont_expand_zero fs/buffer.c:2524 [inline]
 cont_write_begin+0x336/0x730 fs/buffer.c:2587
 hfsplus_write_begin+0x87/0x140 fs/hfsplus/inode.c:52
 generic_cont_expand_simple+0x11f/0x200 fs/buffer.c:2488
 hfsplus_setattr+0x193/0x310 fs/hfsplus/inode.c:263
 notify_change+0x670/0x1160 fs/attr.c:483
 do_truncate+0x15c/0x220 fs/open.c:66
 do_sys_ftruncate+0x6a2/0x790 fs/open.c:194
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6e172b95f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcc99afd08 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007ffcc99afed8 RCX: 00007f6e172b95f9
RDX: 00007f6e172f49b3 RSI: 0000000002007ffb RDI: 0000000000000004
RBP: 00007f6e1732c610 R08: 0000000000000000 R09: 00007ffcc99afed8
R10: 0000000000000603 R11: 0000000000000246 R12: 0000000000000001