loop0: detected capacity change from 0 to 64
hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5375 at fs/hfs/bnode.c:520 hfs_bnode_create+0x461/0x4f0 fs/hfs/bnode.c:520
Modules linked in:
CPU: 0 UID: 0 PID: 5375 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: a1 8b 89 ee e8 b0 49 8c fe e9 cf fc ff ff e8 56 67 24 ff 4c 89 ef e8 9e f6 e2 08 48 c7 c7 60 e0 a1 8b 89 ee e8 90 49 8c 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:ffffc9000d537340 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff88801e898000 RCX: a31af9b89f77b000
RDX: ffffc9000e7aa000 RSI: 0000000000000a97 RDI: 0000000000000a98
RBP: 0000000000000000 R08: ffffc9000d537067 R09: 1ffff92001aa6e0c
R10: dffffc0000000000 R11: fffff52001aa6e0d R12: 0000000000000000
R13: ffff88801e8980e0 R14: ffff888036007200 R15: dffffc0000000000
FS:  00007f3b27d296c0(0000) GS:ffff88808d20d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3b1bdff000 CR3: 0000000042e3c000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5bb/0x640 fs/hfs/btree.c:326
 hfs_bnode_split+0xcc/0xef0 fs/hfsplus/brec.c:245
 hfs_brec_insert+0x377/0xbd0 fs/hfs/brec.c:102
 hfs_cat_create+0x344/0x640 fs/hfs/catalog.c:118
 hfs_create+0x66/0xe0 fs/hfs/dir.c:202
 lookup_open fs/namei.c:3708 [inline]
 open_last_lookups fs/namei.c:3807 [inline]
 path_openat+0x14f1/0x3830 fs/namei.c:4043
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3b26f8ebe9
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:00007f3b27d29038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f3b271c5fa0 RCX: 00007f3b26f8ebe9
RDX: 0000000000040042 RSI: 0000200000000240 RDI: ffffffffffffff9c
RBP: 00007f3b27011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3b271c6038 R14: 00007f3b271c5fa0 R15: 00007ffdebe0ada8
 </TASK>