loop0: detected capacity change from 0 to 1024
hfsplus: inconsistency in B*Tree (128,1,255,1,0)
============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz.0.17/4513 is trying to acquire lock:
ffff0000d8fe8108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x188/0x1324 fs/hfsplus/extents.c:455

but task is already holding lock:
ffff0000d8fe8e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x188/0x1324 fs/hfsplus/extents.c:455

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

6 locks held by syz.0.17/4513:
 #0: ffff0000d640a460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:402
 #1: ffff0000d8fea4c0 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #1: ffff0000d8fea4c0 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: vfs_setxattr+0x138/0x2a8 fs/xattr.c:308
 #2: ffff0000d85840b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x148/0x1c0 fs/hfsplus/bfind.c:28
 #3: ffff0000d85820b0 (&tree->tree_lock/2){+.+.}-{3:3}, at: hfsplus_find_init+0x148/0x1c0 fs/hfsplus/bfind.c:28
 #4: ffff0000d8fe8e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x188/0x1324 fs/hfsplus/extents.c:455
 #5: ffff0000d64080b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x148/0x1c0 fs/hfsplus/bfind.c:28

stack backtrace:
CPU: 0 PID: 4513 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 __lock_acquire+0x15d0/0x6634 kernel/locking/lockdep.c:-1
 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676
 __mutex_lock_common+0x1a0/0x1f3c kernel/locking/mutex.c:603
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
 hfsplus_file_extend+0x188/0x1324 fs/hfsplus/extents.c:455
 hfsplus_bmap_reserve+0xd0/0x458 fs/hfsplus/btree.c:358
 __hfsplus_ext_write_extent+0x1e4/0x4b0 fs/hfsplus/extents.c:104
 __hfsplus_ext_cache_extent+0x84/0x924 fs/hfsplus/extents.c:186
 hfsplus_ext_read_extent fs/hfsplus/extents.c:218 [inline]
 hfsplus_file_extend+0x388/0x1324 fs/hfsplus/extents.c:459
 hfsplus_bmap_reserve+0xd0/0x458 fs/hfsplus/btree.c:358
 hfsplus_create_attr+0x1a0/0x4d8 fs/hfsplus/attributes.c:221
 __hfsplus_setxattr+0x9e8/0x1b14 fs/hfsplus/xattr.c:358
 hfsplus_setxattr+0xdc/0x12c fs/hfsplus/xattr.c:438
 hfsplus_trusted_setxattr+0x54/0x6c fs/hfsplus/xattr_trusted.c:30
 __vfs_setxattr+0x374/0x390 fs/xattr.c:182
 __vfs_setxattr_noperm+0x120/0x56c fs/xattr.c:216
 __vfs_setxattr_locked+0x1e8/0x214 fs/xattr.c:277
 vfs_setxattr+0x158/0x2a8 fs/xattr.c:309
 do_setxattr fs/xattr.c:594 [inline]
 setxattr+0x258/0x2d8 fs/xattr.c:617
 path_setxattr+0x130/0x260 fs/xattr.c:636
 __do_sys_lsetxattr fs/xattr.c:659 [inline]
 __se_sys_lsetxattr fs/xattr.c:655 [inline]
 __arm64_sys_lsetxattr+0xc4/0xe0 fs/xattr.c:655
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 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