WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz-executor317/5633 is trying to acquire lock:
ffff8880143e20a8 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x273/0x330 fs/hfs/bfind.c:36

but task is already holding lock:
ffff8880143e20a8 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x273/0x330 fs/hfs/bfind.c:36

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

locks held by syz-executor317/5633: 5, last CPU#1:
 #0: ffff888034820460 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12a/0x250 fs/read_write.c:739
 #1: ffff8880143db040 (&sb->s_type->i_mutex_key#18){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
 #1: ffff8880143db040 (&sb->s_type->i_mutex_key#18){+.+.}-{4:4}, at: generic_file_write_iter+0x8c/0x390 mm/filemap.c:4514
 #2: ffff8880143daea0 (&HFS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xa6/0xd30 fs/hfs/extent.c:397
 #3: ffff8880143e20a8 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x273/0x330 fs/hfs/bfind.c:36
 #4: ffff8880143dbfe0 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xa6/0xd30 fs/hfs/extent.c:397

stack backtrace:
CPU: 1 UID: 0 PID: 5633 Comm: syz-executor317 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_deadlock_bug.cold+0xbd/0xca kernel/locking/lockdep.c:3085
 check_deadlock kernel/locking/lockdep.c:3137 [inline]
 validate_chain kernel/locking/lockdep.c:3939 [inline]
 __lock_acquire+0x13f4/0x1f40 kernel/locking/lockdep.c:5288
 lock_acquire kernel/locking/lockdep.c:5942 [inline]
 lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5899
 __mutex_lock_common kernel/locking/mutex.c:646 [inline]
 __mutex_lock+0x1a4/0x1bd0 kernel/locking/mutex.c:821
 hfs_find_init+0x273/0x330 fs/hfs/bfind.c:36
 hfs_ext_read_extent+0x1a3/0x9e0 fs/hfs/extent.c:200
 hfs_extend_file+0x4ff/0xd30 fs/hfs/extent.c:401
 hfs_bmap_reserve+0x2a9/0x3a0 fs/hfs/btree.c:399
 __hfs_ext_write_extent+0x3c4/0x510 fs/hfs/extent.c:121
 __hfs_ext_cache_extent fs/hfs/extent.c:174 [inline]
 hfs_ext_read_extent+0x80b/0x9e0 fs/hfs/extent.c:202
 hfs_extend_file+0x4ff/0xd30 fs/hfs/extent.c:401
 hfs_get_block+0x17f/0x840 fs/hfs/extent.c:353
 __block_write_begin_int+0x57a/0x19c0 fs/buffer.c:2030
 block_write_begin+0x9d/0x1d0 fs/buffer.c:2144
 cont_write_begin+0x573/0xa10 fs/buffer.c:2506
 hfs_write_begin+0x143/0x260 fs/hfs/inode.c:62
 generic_perform_write+0x292/0xa40 mm/filemap.c:4374
 __generic_file_write_iter+0x1f7/0x240 mm/filemap.c:4491
 generic_file_write_iter+0xe1/0x390 mm/filemap.c:4517
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6af/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f01315adc29
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 00 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 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd7a838b58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f013160d0b0 RCX: 00007f01315adc29
RDX: 0000003e03000000 RSI: 0000200000000200 RDI: 0000000000000004
RBP: 0000000000000001 R08: 00005555826db570 R09: 00005555826db570
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd7a838b80
R13: 0000000000000002 R14: 431bde82d7b634db R15: 00007f013160d04b
 </TASK>