============================================
WARNING: possible recursive locking detected
5.15.180-syzkaller #0 Not tainted
--------------------------------------------
syz.4.673/7094 is trying to acquire lock:
ffff0000d54473c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x2cc/0x11c8 fs/hfsplus/extents.c:260

but task is already holding lock:
ffff0000d5442988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x180/0x12f4 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.4.673/7094:
 #0: ffff0000dabaa0e0 (&type->s_umount_key#69/1){+.+.}-{3:3}, at: alloc_super+0x1a8/0x824 fs/super.c:229
 #1: ffff0000d6c18998 (&sbi->vh_mutex){+.+.}-{3:3}, at: hfsplus_fill_super+0xf30/0x16dc fs/hfsplus/super.c:553
 #2: ffff0000e701a0b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc fs/hfsplus/bfind.c:28
 #3: ffff0000d5442988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x180/0x12f4 fs/hfsplus/extents.c:458
 #4: ffff0000d6c188f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_allocate+0x88/0x7bc fs/hfsplus/bitmap.c:35

stack backtrace:
CPU: 1 PID: 7094 Comm: syz.4.673 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 __lock_acquire+0x18a4/0x651c kernel/locking/lockdep.c:-1
 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
 __mutex_lock_common+0x194/0x1edc kernel/locking/mutex.c:596
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743
 hfsplus_get_block+0x2cc/0x11c8 fs/hfsplus/extents.c:260
 block_read_full_page+0x298/0xc40 fs/buffer.c:2290
 hfsplus_readpage+0x28/0x38 fs/hfsplus/inode.c:28
 do_read_cache_page+0x5f4/0x8f8 mm/filemap.c:-1
 read_cache_page+0x68/0x88 mm/filemap.c:3574
 read_mapping_page include/linux/pagemap.h:515 [inline]
 hfsplus_block_allocate+0xd8/0x7bc fs/hfsplus/bitmap.c:37
 hfsplus_file_extend+0x738/0x12f4 fs/hfsplus/extents.c:469
 hfsplus_bmap_reserve+0xe8/0x494 fs/hfsplus/btree.c:357
 hfsplus_create_cat+0x170/0xdd4 fs/hfsplus/catalog.c:272
 hfsplus_fill_super+0xf8c/0x16dc fs/hfsplus/super.c:560
 mount_bdev+0x264/0x358 fs/super.c:1400
 hfsplus_mount+0x44/0x58 fs/hfsplus/super.c:641
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
 vfs_get_tree+0x90/0x274 fs/super.c:1530
 do_new_mount+0x228/0x810 fs/namespace.c:3012
 path_mount+0x5b4/0x1000 fs/namespace.c:3342
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount fs/namespace.c:3540 [inline]
 __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3540
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584