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#0: syz.6.792/9244
Modules linked in:
CPU: 0 UID: 0 PID: 9244 Comm: syz.6.792 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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: 82 8b 89 ee e8 80 63 88 fe e9 cf fc ff ff e8 16 b3 21 ff 4c 89 ef e8 be f2 bc 08 48 c7 c7 c0 85 82 8b 89 ee e8 60 63 88 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:ffffc90003e8f520 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888079a7a000 RCX: 65613a17028a9c00
RDX: ffffc900045c1000 RSI: 0000000000003ae7 RDI: 0000000000003ae8
RBP: 0000000000000000 R08: ffffc90003e8f2a7 R09: 1ffff920007d1e54
R10: dffffc0000000000 R11: fffff520007d1e55 R12: 0000000000000000
R13: ffff888079a7a0e0 R14: ffff8880287f7b00 R15: dffffc0000000000
FS:  00007fe18abed6c0(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe18a110300 CR3: 000000006b06a000 CR4: 0000000000350ef0
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+0x9a9/0x10d0 fs/hfsplus/catalog.c:308
 hfsplus_symlink+0x133/0x260 fs/hfsplus/dir.c:453
 vfs_symlink+0x294/0x2d0 fs/namei.c:5514
 do_symlinkat+0x1f5/0x3c0 fs/namei.c:5541
 __do_sys_symlinkat fs/namei.c:5562 [inline]
 __se_sys_symlinkat fs/namei.c:5559 [inline]
 __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:5559
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe189d8f749
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:00007fe18abed038 EFLAGS: 00000246 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007fe189fe5fa0 RCX: 00007fe189d8f749
RDX: 0000200000000200 RSI: ffffffffffffff9c RDI: 0000200000000080
RBP: 00007fe189e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe189fe6038 R14: 00007fe189fe5fa0 R15: 00007ffcbbc5caf8
 </TASK>