============================================
WARNING: possible recursive locking detected
6.4.0-rc2-syzkaller-00338-ge2065b8c1b01 #0 Not tainted
--------------------------------------------
syz-executor.0/10167 is trying to acquire lock:
ffff888023e5e0b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfs_find_init+0x16e/0x1f0

but task is already holding lock:
ffff888023e5e0b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfs_find_init+0x16e/0x1f0

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

5 locks held by syz-executor.0/10167:
 #0: ffff8880392c2460 (sb_writers#25){.+.+}-{0:0}, at: do_sys_ftruncate+0x24c/0x380 fs/open.c:191
 #1: ffff8880378e7128 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline]
 #1: ffff8880378e7128 (&sb->s_type->i_mutex_key#28){+.+.}-{3:3}, at: do_truncate+0x20c/0x300 fs/open.c:64
 #2: ffff8880378e6f78 (&HFS_I(inode)->extents_lock#2){+.+.}-{3:3}, at: hfs_extend_file+0xff/0x1440 fs/hfs/extent.c:397
 #3: ffff888023e5e0b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfs_find_init+0x16e/0x1f0
 #4: ffff8880378e34f8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xff/0x1440 fs/hfs/extent.c:397

stack backtrace:
CPU: 0 PID: 10167 Comm: syz-executor.0 Not tainted 6.4.0-rc2-syzkaller-00338-ge2065b8c1b01 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
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:3001 [inline]
 check_deadlock kernel/locking/lockdep.c:3044 [inline]
 validate_chain+0x472a/0x58e0 kernel/locking/lockdep.c:3829
 __lock_acquire+0x1295/0x2000 kernel/locking/lockdep.c:5074
 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691
 __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
 hfs_find_init+0x16e/0x1f0
 hfs_ext_read_extent fs/hfs/extent.c:200 [inline]
 hfs_extend_file+0x31b/0x1440 fs/hfs/extent.c:401
 hfs_bmap_reserve+0xd9/0x3f0 fs/hfs/btree.c:234
 __hfs_ext_write_extent+0x22e/0x4f0 fs/hfs/extent.c:121
 __hfs_ext_cache_extent+0x6a/0x990 fs/hfs/extent.c:174
 hfs_ext_read_extent fs/hfs/extent.c:202 [inline]
 hfs_extend_file+0x344/0x1440 fs/hfs/extent.c:401
 hfs_get_block+0x3e4/0xb60 fs/hfs/extent.c:353
 __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
 hfs_write_begin+0x8a/0xd0 fs/hfs/inode.c:58
 cont_expand_zero fs/buffer.c:2461 [inline]
 cont_write_begin+0x316/0x880 fs/buffer.c:2524
 hfs_write_begin+0x8a/0xd0 fs/hfs/inode.c:58
 hfs_file_truncate+0x1ed/0xa20 fs/hfs/extent.c:494
 hfs_inode_setattr+0x461/0x6a0 fs/hfs/inode.c:656
 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: 0033:0x7efdf7c8c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007efdf8a63168 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007efdf7dabf80 RCX: 00007efdf7c8c169
RDX: 0000000000000000 RSI: 0000000002007ffb RDI: 0000000000000005
RBP: 00007efdf7ce7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeed8b62bf R14: 00007efdf8a63300 R15: 0000000000022000
 </TASK>