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.4.17/5886
Modules linked in:
CPU: 1 UID: 0 PID: 5886 Comm: syz.4.17 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: 67 8b 89 ee e8 04 6a 83 fe e9 cf fc ff ff e8 0a 83 20 ff 4c 89 f7 e8 12 0c 7a 08 48 c7 c7 20 55 67 8b 89 ee e8 e4 69 83 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:ffffc9000556f140 EFLAGS: 00010246
RAX: 0000000000000023 RBX: dffffc0000000000 RCX: 7e0c7bdbf632c200
RDX: ffffc9000f7da000 RSI: 0000000000002c3e RDI: 0000000000002c3f
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000aaddd9 R12: 0000000000000000
R13: ffff8880281c8000 R14: ffff8880281c80d0 R15: ffff8880116fa200
FS:  00007fd3dd1166c0(0000) GS:ffff888126287000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb6e54cd58 CR3: 000000005bede000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hfs_bnode_split+0xd2/0x1090 fs/hfsplus/brec.c:248
 hfsplus_brec_insert+0x3bc/0xd70 fs/hfsplus/brec.c:100
 hfsplus_create_cat+0xa64/0x11f0 fs/hfsplus/catalog.c:308
 hfsplus_mknod+0x186/0x3f0 fs/hfsplus/dir.c:538
 lookup_open fs/namei.c:4511 [inline]
 open_last_lookups fs/namei.c:4611 [inline]
 path_openat+0x13b4/0x38a0 fs/namei.c:4855
 do_file_open+0x23e/0x4a0 fs/namei.c:4887
 do_sys_openat2+0x113/0x200 fs/open.c:1364
 do_sys_open fs/open.c:1370 [inline]
 __do_sys_openat fs/open.c:1386 [inline]
 __se_sys_openat fs/open.c:1381 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1381
 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: 0033:0x7fd3deebce59
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:00007fd3dd116028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fd3df135fa0 RCX: 00007fd3deebce59
RDX: 0000000000101042 RSI: 00002000000000c0 RDI: ffffffffffffff9c
RBP: 00007fd3def52d6f R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000000a0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd3df136038 R14: 00007fd3df135fa0 R15: 00007ffd54bceaf8
 </TASK>