loop0: detected capacity change from 0 to 64
hfs: new node 4 already hashed?
------------[ cut here ]------------
1
WARNING: fs/hfs/bnode.c:520 at hfs_bnode_create+0x45a/0x4e0 fs/hfs/bnode.c:520, CPU#0: syz.0.0/5336
Modules linked in:
CPU: 0 UID: 0 PID: 5336 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 04/01/2014
RIP: 0010:hfs_bnode_create+0x45a/0x4e0 fs/hfs/bnode.c:520
Code: 08 8c 89 ee e8 47 c0 71 fe e9 d6 fc ff ff e8 6d 82 10 ff 4c 89 ef e8 65 2d 1e 09 48 c7 c7 20 c0 08 8c 89 ee e8 27 c0 71 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:ffffc9000dff7748 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff88801bbc2000 RCX: d7a7812264e3d300
RDX: ffffc9000ef82000 RSI: 0000000000000c04 RDI: 0000000000000c05
RBP: 0000000000000004 R08: ffffc9000dff74c7 R09: 1ffff92001bfee98
R10: dffffc0000000000 R11: fffff52001bfee99 R12: 0000000000000004
R13: ffff88801bbc20d8 R14: ffff88801ad22800 R15: dffffc0000000000
FS:  00007f25566df6c0(0000) GS:ffff88808c54a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2549601fd2 CR3: 000000001fd4c000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5bd/0x650 fs/hfs/btree.c:326
 hfs_bnode_split+0xd4/0x1070 fs/hfsplus/brec.c:-1
 hfs_brec_insert+0x3a4/0xc80 fs/hfs/brec.c:102
 hfs_cat_create+0x50c/0x810 fs/hfs/catalog.c:131
 hfs_mkdir+0x79/0xe0 fs/hfs/dir.c:226
 vfs_mkdir+0x406/0x620 fs/namei.c:5276
 filename_mkdirat+0x285/0x510 fs/namei.c:5309
 __do_sys_mkdirat fs/namei.c:5330 [inline]
 __se_sys_mkdirat+0x35/0x150 fs/namei.c:5327
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f255579de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f25566defe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f2555a25fa0 RCX: 00007f255579de99
RDX: 0000000000000001 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f2555833eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2555a26038 R14: 00007f2555a25fa0 R15: 00007ffca8106628
 </TASK>