loop0: detected capacity change from 0 to 1024
hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5353 at fs/hfsplus/bnode.c:671 hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:671
Modules linked in:
CPU: 0 UID: 0 PID: 5353 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:hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:671
Code: a1 8b 89 ee e8 b0 de 8d fe e9 cf fc ff ff e8 d6 f9 25 ff 4c 89 ef e8 9e 6b e4 08 48 c7 c7 c0 c9 a1 8b 89 ee e8 90 de 8d 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:ffffc9000d4defa0 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888036c60000 RCX: f229965d99a44800
RDX: ffffc9000de3a000 RSI: 00000000000056c1 RDI: 00000000000056c2
RBP: 0000000000000000 R08: ffffc9000d4decc7 R09: 1ffff92001a9bd98
R10: dffffc0000000000 R11: fffff52001a9bd99 R12: 0000000000000000
R13: ffff888036c600e0 R14: ffff888035f19300 R15: dffffc0000000000
FS:  00007fef9abe26c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f470e056000 CR3: 0000000011491000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x5af/0x640 fs/hfsplus/btree.c:415
 hfs_bnode_split+0xcc/0xef0 fs/hfsplus/brec.c:245
 hfsplus_brec_insert+0x38f/0xcc0 fs/hfsplus/brec.c:100
 hfsplus_create_cat+0x3b6/0x1000 fs/hfsplus/catalog.c:292
 hfsplus_fill_super+0x12f5/0x1b50 fs/hfsplus/super.c:559
 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1692
 vfs_get_tree+0x92/0x2b0 fs/super.c:1815
 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808
 do_mount fs/namespace.c:4136 [inline]
 __do_sys_mount fs/namespace.c:4347 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4324
 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: 0033:0x7fef99d9038a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fef9abe1e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fef9abe1ef0 RCX: 00007fef99d9038a
RDX: 00002000000001c0 RSI: 0000200000000000 RDI: 00007fef9abe1eb0
RBP: 00002000000001c0 R08: 00007fef9abe1ef0 R09: 0000000002000010
R10: 0000000002000010 R11: 0000000000000246 R12: 0000200000000000
R13: 00007fef9abe1eb0 R14: 00000000000006b1 R15: 0000200000000100
 </TASK>