loop0: detected capacity change from 0 to 1024
============================================
WARNING: possible recursive locking detected
6.1.33-syzkaller #0 Not tainted
--------------------------------------------
syz-executor101/3542 is trying to acquire lock:
ffff888073731548 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x37f/0x14e0 fs/hfsplus/extents.c:260

but task is already holding lock:
ffff888073732988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x1d2/0x1b10 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-executor101/3542:
 #0: ffff88801870c460 (sb_writers#9){.+.+}-{0:0}, at: vfs_write+0x269/0xba0 fs/read_write.c:580
 #1: ffff888073732b80 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
 #1: ffff888073732b80 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: generic_file_write_iter+0x7f/0x310 mm/filemap.c:3911
 #2: ffff888073732988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x1d2/0x1b10 fs/hfsplus/extents.c:457
 #3: ffff88807ef140f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_allocate+0x9a/0x8b0 fs/hfsplus/bitmap.c:35

stack backtrace:
CPU: 0 PID: 3542 Comm: syz-executor101 Not tainted 6.1.33-syzkaller #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+0x1e3/0x2cb lib/dump_stack.c:106
 print_deadlock_bug kernel/locking/lockdep.c:2991 [inline]
 check_deadlock kernel/locking/lockdep.c:3034 [inline]
 validate_chain+0x4726/0x58e0 kernel/locking/lockdep.c:3819
 __lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5669
 __mutex_lock_common+0x1d4/0x2520 kernel/locking/mutex.c:603
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
 hfsplus_get_block+0x37f/0x14e0 fs/hfsplus/extents.c:260
 block_read_full_folio+0x403/0xf60 fs/buffer.c:2271
 filemap_read_folio+0x199/0x780 mm/filemap.c:2407
 do_read_cache_folio+0x2ee/0x810 mm/filemap.c:3535
 do_read_cache_page+0x32/0x220 mm/filemap.c:3577
 read_mapping_page include/linux/pagemap.h:756 [inline]
 hfsplus_block_allocate+0xea/0x8b0 fs/hfsplus/bitmap.c:37
 hfsplus_file_extend+0xa4c/0x1b10 fs/hfsplus/extents.c:468
 hfsplus_get_block+0x402/0x14e0 fs/hfsplus/extents.c:245
 __block_write_begin_int+0x544/0x1a30 fs/buffer.c:1991
 __block_write_begin fs/buffer.c:2041 [inline]
 block_write_begin+0x98/0x1f0 fs/buffer.c:2102
 cont_write_begin+0x63f/0x880 fs/buffer.c:2456
 hfsplus_write_begin+0x86/0xd0 fs/hfsplus/inode.c:52
 generic_perform_write+0x2fc/0x5e0 mm/filemap.c:3754
 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3882
 generic_file_write_iter+0xab/0x310 mm/filemap.c:3914
 call_write_iter include/linux/fs.h:2205 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x7ae/0xba0 fs/read_write.c:584
 ksys_write+0x19c/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc30b3a8929
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:00007ffddfa5bf88 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc30b3a8929
RDX: 0000000000000478 RSI: 0000000020000d00 RDI: 0000000000000004
RBP: 00007fc30b3681c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc30b368250
R13: 0000000000000000 R14: 00000000000000