loop4: detected capacity change from 0 to 1024
============================================
WARNING: possible recursive locking detected
6.1.122-syzkaller #0 Tainted: G        W         
--------------------------------------------
syz.4.10/4430 is trying to acquire lock:
ffff0000d5be1548 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x2c4/0x1168 fs/hfsplus/extents.c:260

but task is already holding lock:
ffff0000d5be07c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x198/0x14cc fs/hfsplus/extents.c:458

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

5 locks held by syz.4.10/4430:
 #0: ffff0000d5a4c0e0 (&type->s_umount_key#50/1){+.+.}-{3:3}, at: alloc_super+0x1b4/0x824 fs/super.c:228
 #1: ffff0000db3a6198 (&sbi->vh_mutex){+.+.}-{3:3}, at: hfsplus_fill_super+0xf08/0x166c fs/hfsplus/super.c:553
 #2: ffff0000d02900b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc fs/hfsplus/bfind.c:28
 #3: ffff0000d5be07c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x198/0x14cc fs/hfsplus/extents.c:458
 #4: ffff0000db3a60f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_allocate+0x90/0x818 fs/hfsplus/bitmap.c:35

stack backtrace:
CPU: 0 PID: 4430 Comm: syz.4.10 Tainted: G        W          6.1.122-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 __lock_acquire+0x6310/0x7680 kernel/locking/lockdep.c:5049
 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
 hfsplus_get_block+0x2c4/0x1168 fs/hfsplus/extents.c:260
 block_read_full_folio+0x2f4/0x98c fs/buffer.c:2271
 hfsplus_read_folio+0x28/0x38 fs/hfsplus/inode.c:28
 filemap_read_folio+0x14c/0x39c mm/filemap.c:2489
 do_read_cache_folio+0x24c/0x544 mm/filemap.c:3626
 do_read_cache_page mm/filemap.c:3668 [inline]
 read_cache_page+0x6c/0x180 mm/filemap.c:3677
 read_mapping_page include/linux/pagemap.h:791 [inline]
 hfsplus_block_allocate+0xe0/0x818 fs/hfsplus/bitmap.c:37
 hfsplus_file_extend+0x770/0x14cc fs/hfsplus/extents.c:469
 hfsplus_bmap_reserve+0xec/0x474 fs/hfsplus/btree.c:358
 hfsplus_create_cat+0x18c/0x1330 fs/hfsplus/catalog.c:272
 hfsplus_fill_super+0xf60/0x166c fs/hfsplus/super.c:560
 mount_bdev+0x274/0x370 fs/super.c:1443
 hfsplus_mount+0x44/0x58 fs/hfsplus/super.c:641
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
 vfs_get_tree+0x90/0x274 fs/super.c:1573
 do_new_mount+0x278/0x8fc fs/namespace.c:3056
 path_mount+0x590/0xe5c fs/namespace.c:3386
 do_mount fs/namespace.c:3399 [inline]
 __do_sys_mount fs/namespace.c:3607 [inline]
 __se_sys_mount fs/namespace.c:3584 [inline]
 __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3584
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585