hfsplus: new node 0 already hashed?
------------[ cut here ]------------
1
WARNING: fs/hfsplus/bnode.c:634 at hfsplus_bnode_create+0x45d/0x4f0 fs/hfsplus/bnode.c:634, CPU#1: syz.2.216/6981
Modules linked in:
CPU: 1 UID: 0 PID: 6981 Comm: syz.2.216 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:hfsplus_bnode_create+0x45d/0x4f0 fs/hfsplus/bnode.c:634
Code: 87 8b 89 ee e8 34 31 7f fe e9 cf fc ff ff e8 da 03 1d ff 4c 89 f7 e8 22 2f 9c 08 48 c7 c7 a0 bc 87 8b 89 ee e8 14 31 7f fe 90 <0f> 0b 90 49 c7 c5 ef ff ff ff eb a9 44 89 f9 80 e1 07 80 c1 03 38
RSP: 0018:ffffc90006d1f2a0 EFLAGS: 00010246
RAX: 0000000000000023 RBX: dffffc0000000000 RCX: 416d674e8f8da700
RDX: ffffc90011b4c000 RSI: 0000000000002cc5 RDI: 0000000000002cc6
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000da3e05 R12: 0000000000000000
R13: ffff888065954000 R14: ffff8880659540d0 R15: ffff88803886fc00
FS:  00007efde2ba56c0(0000) GS:ffff888125d49000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efde233ed58 CR3: 000000003b48a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hfs_bnode_split+0xd2/0x1070 fs/hfsplus/brec.c:248
 hfsplus_brec_insert+0x3bb/0xde0 fs/hfsplus/brec.c:100
 hfsplus_create_cat+0x437/0x1240 fs/hfsplus/catalog.c:292
 hfsplus_mknod+0x184/0x3c0 fs/hfsplus/dir.c:532
 lookup_open fs/namei.c:4508 [inline]
 open_last_lookups fs/namei.c:4608 [inline]
 path_openat+0x1344/0x3850 fs/namei.c:4860
 do_file_open+0x23e/0x4a0 fs/namei.c:4892
 do_sys_openat2+0x115/0x200 fs/open.c:1368
 do_sys_open fs/open.c:1374 [inline]
 __do_sys_open fs/open.c:1382 [inline]
 __se_sys_open fs/open.c:1378 [inline]
 __x64_sys_open+0x11e/0x150 fs/open.c:1378
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efde496de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efde2ba5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007efde4bf6090 RCX: 00007efde496de59
RDX: 0000000000000004 RSI: 0000000000008040 RDI: 0000200000000800
RBP: 00007efde4a03e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efde4bf6128 R14: 00007efde4bf6090 R15: 00007fff6e160e58
 </TASK>