hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: fs/hfsplus/bnode.c:631 at hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:631, CPU#1: syz.3.168/7073
Modules linked in:
CPU: 1 UID: 0 PID: 7073 Comm: syz.3.168 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:631
Code: 02 8b 89 ee e8 80 5b 91 fe e9 cf fc ff ff e8 26 6b 2a ff 4c 89 ef e8 6e e8 3f 08 48 c7 c7 40 10 02 8b 89 ee e8 60 5b 91 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:ffffc90004307520 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888038e70000 RCX: cfb49fad432eba00
RDX: ffffc9000dabc000 RSI: 0000000000005903 RDI: 0000000000005904
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000860e49 R12: 0000000000000000
R13: ffff888038e700d0 R14: ffff8880297cc200 R15: dffffc0000000000
FS:  00007f330639e6c0(0000) GS:ffff888126e03000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f099117d000 CR3: 000000004f0ae000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x746/0xaf0 fs/hfsplus/btree.c:421
 hfs_bnode_split+0xcc/0x1080 fs/hfsplus/brec.c:245
 hfsplus_brec_insert+0x3b6/0xd70 fs/hfsplus/brec.c:100
 hfsplus_create_cat+0x9bb/0x10e0 fs/hfsplus/catalog.c:308
 hfsplus_symlink+0x133/0x260 fs/hfsplus/dir.c:453
 vfs_symlink+0x29a/0x2d0 fs/namei.c:5514
 do_symlinkat+0x1f5/0x3d0 fs/namei.c:5541
 __do_sys_symlink fs/namei.c:5567 [inline]
 __se_sys_symlink fs/namei.c:5565 [inline]
 __x64_sys_symlink+0x7a/0x90 fs/namei.c:5565
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f330813f749
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:00007f330639e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007f3308395fa0 RCX: 00007f330813f749
RDX: 0000000000000000 RSI: 0000200000000800 RDI: 0000200000000280
RBP: 00007f33081c3f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3308396038 R14: 00007f3308395fa0 R15: 00007ffec7412888
 </TASK>