============================================
WARNING: possible recursive locking detected
6.13.0-rc6-syzkaller-gb62cef9a5c67 #0 Not tainted
--------------------------------------------
syz-executor.0/6185 is trying to acquire lock:
ffff88804f98c0b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x183/0x220 fs/hfs/bfind.c:33

but task is already holding lock:
ffff88804f98c0b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x183/0x220 fs/hfs/bfind.c:33

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

6 locks held by syz-executor.0/6185:
 #0: ffff8880728c82b8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x267/0x390 fs/file.c:1192
 #1: ffff88804f98e420 (sb_writers#14){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #2: ffff8880350b1620 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
 #2: ffff8880350b1620 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: generic_file_write_iter+0x8c/0x340 mm/filemap.c:4170
 #3: ffff8880350b1478 (&HFS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xa2/0xb10 fs/hfs/extent.c:397
 #4: ffff88804f98c0b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x183/0x220 fs/hfs/bfind.c:33
 #5: ffff8880350b00f8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xa2/0xb10 fs/hfs/extent.c:397

stack backtrace:
CPU: 1 UID: 0 PID: 6185 Comm: syz-executor.0 Not tainted 6.13.0-rc6-syzkaller-gb62cef9a5c67 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_deadlock_bug+0x2e3/0x410 kernel/locking/lockdep.c:3037
 check_deadlock kernel/locking/lockdep.c:3089 [inline]
 validate_chain kernel/locking/lockdep.c:3891 [inline]
 __lock_acquire+0x2117/0x3c40 kernel/locking/lockdep.c:5226
 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
 __mutex_lock_common kernel/locking/mutex.c:585 [inline]
 __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735
 hfs_find_init+0x183/0x220 fs/hfs/bfind.c:33
 hfs_ext_read_extent+0x19c/0x9e0 fs/hfs/extent.c:200
 hfs_extend_file+0x4e4/0xb10 fs/hfs/extent.c:401
 hfs_bmap_reserve+0x29c/0x380 fs/hfs/btree.c:234
 __hfs_ext_write_extent+0x3cf/0x520 fs/hfs/extent.c:121
 __hfs_ext_cache_extent fs/hfs/extent.c:174 [inline]
 hfs_ext_read_extent+0x809/0x9e0 fs/hfs/extent.c:202
 hfs_extend_file+0x4e4/0xb10 fs/hfs/extent.c:401
 hfs_get_block+0x17f/0x830 fs/hfs/extent.c:353
 __block_write_begin_int+0x4fb/0x16e0 fs/buffer.c:2116
 block_write_begin+0x9a/0x1d0 fs/buffer.c:2226
 cont_write_begin+0x61d/0x950 fs/buffer.c:2577
 hfs_write_begin+0x64/0x120 fs/hfs/inode.c:52
 generic_perform_write+0x2ba/0x920 mm/filemap.c:4046
 __generic_file_write_iter+0x1f7/0x240 mm/filemap.c:4147
 generic_file_write_iter+0xe1/0x340 mm/filemap.c:4173
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0x5ae/0x1150 fs/read_write.c:679
 ksys_write+0x12b/0x250 fs/read_write.c:731
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5d0647cda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5d071e20c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5d065abf80 RCX: 00007f5d0647cda9
RDX: 000000000208e24b RSI: 0000000020000180 RDI: 0000000000000004
RBP: 00007f5d064c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f5d065abf80 R15: 00007ffe44c538b8
 </TASK>