hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6227 at fs/hfsplus/bnode.c:579 hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:579
Modules linked in:
CPU: 1 UID: 0 PID: 6227 Comm: syz.1.42 Not tainted 6.16.0-rc7-syzkaller-00127-g302f88ff3584 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:579
Code: a1 8b 89 ee e8 80 4f 93 fe e9 cf fc ff ff e8 06 dd 2b ff 4c 89 ef e8 3e cc d4 08 48 c7 c7 a0 9b a1 8b 89 ee e8 60 4f 93 fe 90 <0f> 0b 90 eb b0 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c d6 fb ff ff
RSP: 0018:ffffc9000be96d40 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888035062000 RCX: 128dd7c3dc79b600
RDX: ffffc90005041000 RSI: 0000000000006088 RDI: 0000000000006089
RBP: 0000000000000000 R08: ffffc9000be96a67 R09: 1ffff920017d2d4c
R10: dffffc0000000000 R11: fffff520017d2d4d R12: 0000000000000000
R13: ffff8880350620e0 R14: ffff888033bc8e00 R15: dffffc0000000000
FS:  00007f02b5f8a6c0(0000) GS:ffff888125d57000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe616ff5000 CR3: 0000000028534000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x5af/0x640 fs/hfsplus/btree.c:415
 hfs_btree_inc_height+0xf6/0xb60 fs/hfsplus/brec.c:475
 hfsplus_brec_insert+0x12d/0xcc0 fs/hfsplus/brec.c:75
 hfsplus_create_attr+0x30d/0x3a0 fs/hfsplus/attributes.c:252
 __hfsplus_setxattr+0x61d/0x1f40 fs/hfsplus/xattr.c:354
 hfsplus_initxattrs+0x1ae/0x280 fs/hfsplus/xattr_security.c:59
 security_inode_init_security+0x29d/0x3f0 security/security.c:1852
 hfsplus_fill_super+0x1423/0x1b70 fs/hfsplus/super.c:568
 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1681
 vfs_get_tree+0x92/0x2b0 fs/super.c:1804
 do_new_mount+0x24a/0xa40 fs/namespace.c:3902
 do_mount fs/namespace.c:4239 [inline]
 __do_sys_mount fs/namespace.c:4450 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4427
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f02b519014a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f02b5f89e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f02b5f89ef0 RCX: 00007f02b519014a
RDX: 0000200000000000 RSI: 0000200000002280 RDI: 00007f02b5f89eb0
RBP: 0000200000000000 R08: 00007f02b5f89ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000002280
R13: 00007f02b5f89eb0 R14: 00000000000006e9 R15: 00002000000002c0
 </TASK>