hfsplus: new node 0 already hashed?
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WARNING: CPU: 0 PID: 7542 at fs/hfsplus/bnode.c:671 hfsplus_bnode_create+0x461/0x4f0
Modules linked in:
CPU: 0 UID: 0 PID: 7542 Comm: syz.3.181 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:hfsplus_bnode_create+0x461/0x4f0
Code: a1 8b 89 ee e8 20 6c 8f fe e9 cf fc ff ff e8 06 78 27 ff 4c 89 ef e8 7e 09 e4 08 48 c7 c7 c0 b7 a1 8b 89 ee e8 00 6c 8f 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:ffffc90001c5f100 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff88810ef4e000 RCX: c4008ece2140b800
RDX: ffffc900285f4000 RSI: 000000000000312f RDI: 0000000000003130
RBP: 0000000000000000 R08: ffffc90001c5ee27 R09: 1ffff9200038bdc4
R10: dffffc0000000000 R11: fffff5200038bdc5 R12: 0000000000000000
R13: ffff88810ef4e0e0 R14: ffff8880394bb300 R15: dffffc0000000000
FS:  00007f76335f66c0(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000140 CR3: 000000012bdd0000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x5af/0x640
 hfs_bnode_split+0xcc/0xef0
 hfsplus_brec_insert+0x38f/0xcc0
 hfsplus_create_cat+0x3b6/0x1000
 hfsplus_mknod+0x16a/0x290
 path_openat+0x14f4/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_creat+0x8f/0xc0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f763538ebe9
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:00007f76335f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f76355b5fa0 RCX: 00007f763538ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000e00
RBP: 00007f7635411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f76355b6038 R14: 00007f76355b5fa0 R15: 00007fff04b84da8
 </TASK>
