loop0: detected capacity change from 0 to 1024
hfsplus: new node 0 already hashed?
------------[ cut here ]------------
1
WARNING: fs/hfsplus/bnode.c:631 at hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:631, CPU#0: syz.0.0/5341
Modules linked in:
CPU: 0 UID: 0 PID: 5341 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:hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:631
Code: a7 8b 89 ee e8 00 c4 82 fe e9 cf fc ff ff e8 06 c3 1d ff 4c 89 ef e8 ce 51 d8 08 48 c7 c7 00 6d a7 8b 89 ee e8 e0 c3 82 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:ffffc9000ea2ef40 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff8880371a6000 RCX: b769b9ae64d05f00
RDX: ffffc90020b61000 RSI: 000000000000484e RDI: 000000000000484f
RBP: 0000000000000000 R08: ffffc9000ea2ecc7 R09: 1ffff92001d45d98
R10: dffffc0000000000 R11: fffff52001d45d99 R12: 0000000000000000
R13: ffff8880371a60e0 R14: ffff888032c62f00 R15: dffffc0000000000
FS:  00007fca3c19b6c0(0000) GS:ffff88808cf1d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c62b43000 CR3: 000000001f040000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x747/0xb00 fs/hfsplus/btree.c:421
 hfs_bnode_split+0xd4/0x1090 fs/hfsplus/brec.c:245
 hfsplus_brec_insert+0x3bc/0xd70 fs/hfsplus/brec.c:100
 hfsplus_create_cat+0x426/0x11b0 fs/hfsplus/catalog.c:292
 hfsplus_fill_super+0x1247/0x19e0 fs/hfsplus/super.c:601
 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1691
 vfs_get_tree+0x92/0x2a0 fs/super.c:1751
 fc_mount fs/namespace.c:1199 [inline]
 do_new_mount_fc fs/namespace.c:3636 [inline]
 do_new_mount+0x329/0xa50 fs/namespace.c:3712
 do_mount fs/namespace.c:4035 [inline]
 __do_sys_mount fs/namespace.c:4224 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4201
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fca3b39bf4a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 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:00007fca3c19ae58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fca3c19aee0 RCX: 00007fca3b39bf4a
RDX: 0000200000000100 RSI: 0000200000002900 RDI: 00007fca3c19aea0
RBP: 0000200000000100 R08: 00007fca3c19aee0 R09: 0000000002000010
R10: 0000000002000010 R11: 0000000000000246 R12: 0000200000002900
R13: 00007fca3c19aea0 R14: 00000000000006d6 R15: 0000200000000380
 </TASK>