hfs: new node 0 already hashed?
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1
WARNING: fs/hfs/bnode.c:520 at hfs_bnode_create+0x45a/0x4e0, CPU#0: syz.4.245/7002
Modules linked in:
CPU: 0 UID: 0 PID: 7002 Comm: syz.4.245 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:hfs_bnode_create+0x45a/0x4e0
Code: e8 8b 89 ee e8 57 65 73 fe e9 d6 fc ff ff e8 3d 1b 12 ff 4c 89 ef e8 d5 b1 04 09 48 c7 c7 20 b0 e8 8b 89 ee e8 37 65 73 fe 90 <0f> 0b 90 eb b0 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c dd fb ff ff
RSP: 0018:ffffc900044af748 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff8881130e4000 RCX: 15f4f4a0b5dc3700
RDX: ffffc9000874a000 RSI: 0000000000000be4 RDI: 0000000000000be5
RBP: 0000000000000000 R08: ffffc900044af4c7 R09: 1ffff92000895e98
R10: dffffc0000000000 R11: fffff52000895e99 R12: 0000000000000000
R13: ffff8881130e40d8 R14: ffff88810ccb3900 R15: dffffc0000000000
FS:  00007fd89bc486c0(0000) GS:ffff88818dc18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011f57e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5bd/0x650
 hfs_bnode_split+0xd4/0x1070
 hfs_brec_insert+0x3a4/0xc80
 hfs_cat_create+0x50c/0x810
 hfs_mkdir+0x79/0xe0
 vfs_mkdir+0x406/0x620
 filename_mkdirat+0x285/0x510
 __se_sys_mkdirat+0x35/0x150
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd89ad9bcc7
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 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:00007fd89bc47e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fd89bc47ee0 RCX: 00007fd89ad9bcc7
RDX: 00000000000001ff RSI: 0000200000000100 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000200000000240 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000100
R13: 00007fd89bc47ea0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
