hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6610 at fs/hfsplus/bnode.c:579 hfsplus_bnode_create+0x3c2/0x450 fs/hfsplus/bnode.c:579
Modules linked in:
CPU: 0 UID: 0 PID: 6610 Comm: syz.4.113 Not tainted 6.15.0-rc6-syzkaller-00085-gc94d59a126cb #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:hfsplus_bnode_create+0x3c2/0x450 fs/hfsplus/bnode.c:579
Code: 81 8b 89 ee e8 bf 4e 94 fe e9 6e fd ff ff e8 c5 b2 2c ff 4c 89 ef e8 0d 7b be 08 48 c7 c7 a0 63 81 8b 89 ee e8 9f 4e 94 fe 90 <0f> 0b 90 eb b0 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 75 fc ff ff
RSP: 0018:ffffc90003887118 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff8880308ac000 RCX: 1b4ad8c2801e2d00
RDX: ffffc9000dc7a000 RSI: 0000000000002396 RDI: 0000000000002397
RBP: 0000000000000000 R08: ffffc90003886e07 R09: 1ffff92000710dc0
R10: dffffc0000000000 R11: fffff52000710dc1 R12: 0000000000000000
R13: ffff8880308ac0e0 R14: ffff88801dbc7200 R15: dffffc0000000000
FS:  00007fe1d1fc76c0(0000) GS:ffff8881260fb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055885ad38ad0 CR3: 000000002f508000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x52d/0x5c0 fs/hfsplus/btree.c:415
 hfs_bnode_split+0xcc/0xef0 fs/hfsplus/brec.c:245
 hfsplus_brec_insert+0x38f/0xcc0 fs/hfsplus/brec.c:100
 hfsplus_create_cat+0x9e9/0x1000 fs/hfsplus/catalog.c:308
 hfsplus_mknod+0x16a/0x290 fs/hfsplus/dir.c:494
 lookup_open fs/namei.c:3701 [inline]
 open_last_lookups fs/namei.c:3800 [inline]
 path_openat+0x14f1/0x3830 fs/namei.c:4036
 do_filp_open+0x1fa/0x410 fs/namei.c:4066
 do_sys_openat2+0x121/0x1c0 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe1d118e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe1d1fc7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fe1d13b6080 RCX: 00007fe1d118e969
RDX: 0000000000105042 RSI: 0000200000000180 RDI: ffffffffffffff9c
RBP: 00007fe1d1210ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000189 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fe1d13b6080 R15: 00007ffde48373b8
 </TASK>