loop0: detected capacity change from 0 to 64
hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5322 at fs/hfs/bnode.c:520 hfs_bnode_create+0x461/0x4f0 fs/hfs/bnode.c:520
Modules linked in:
CPU: 0 UID: 0 PID: 5322 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:hfs_bnode_create+0x461/0x4f0 fs/hfs/bnode.c:520
Code: 82 8b 89 ee e8 c0 23 88 fe e9 cf fc ff ff e8 76 a5 20 ff 4c 89 ef e8 0e 38 ab 08 48 c7 c7 60 43 82 8b 89 ee e8 a0 23 88 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:ffffc9000d3f7760 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff8880110ac000 RCX: 9a086e06103f1b00
RDX: ffffc9000dcea000 RSI: 0000000000001c36 RDI: 0000000000001c37
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba650 R12: 0000000000000000
R13: ffff8880110ac0e0 R14: ffff88801fea4c00 R15: dffffc0000000000
FS:  00007f19c91696c0(0000) GS:ffff88808d733000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f19c85daa80 CR3: 0000000019eaa000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5bb/0x640 fs/hfs/btree.c:326
 hfs_bnode_split+0xcc/0x1060 fs/hfsplus/brec.c:245
 hfs_brec_insert+0x39b/0xc60 fs/hfs/brec.c:102
 hfs_cat_create+0x483/0x730 fs/hfs/catalog.c:131
 hfs_mkdir+0x6c/0xe0 fs/hfs/dir.c:232
 vfs_mkdir+0x306/0x510 fs/namei.c:4453
 do_mkdirat+0x247/0x590 fs/namei.c:4486
 __do_sys_mkdirat fs/namei.c:4503 [inline]
 __se_sys_mkdirat fs/namei.c:4501 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4501
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f19c838d717
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007f19c9168e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f19c9168ef0 RCX: 00007f19c838d717
RDX: 00000000000001ff RSI: 0000200000000680 RDI: 00000000ffffff9c
RBP: 0000200000000080 R08: 0000200000000d40 R09: 0000000000000000
R10: 0000200000000080 R11: 0000000000000246 R12: 0000200000000680
R13: 00007f19c9168eb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>