hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 16797 at fs/hfsplus/bnode.c:671 hfsplus_bnode_create+0x461/0x4f0
Modules linked in:
CPU: 0 UID: 0 PID: 16797 Comm: syz.9.1662 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 50 29 8f fe e9 cf fc ff ff e8 06 47 27 ff 4c 89 ef e8 4e 97 e4 08 48 c7 c7 00 bb a1 8b 89 ee e8 30 29 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:ffffc9000451f100 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff88810658a000 RCX: ffd33e7c91583000
RDX: ffffc900038f1000 RSI: 0000000000005111 RDI: 0000000000005112
RBP: 0000000000000000 R08: ffffc9000451ee27 R09: 1ffff920008a3dc4
R10: dffffc0000000000 R11: fffff520008a3dc5 R12: 0000000000000000
R13: ffff88810658a0e0 R14: ffff888034ecbc00 R15: dffffc0000000000
FS:  00007f7b291c16c0(0000) GS:ffff8880b8615000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000020c0 CR3: 000000010acf8000 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: 0033:0x7f7b2838eba9
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:00007f7b291c1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f7b285d5fa0 RCX: 00007f7b2838eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000580
RBP: 00007f7b28411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7b285d6038 R14: 00007f7b285d5fa0 R15: 00007ffef035dd88
 </TASK>
