loop0: detected capacity change from 0 to 1024
overlay: filesystem on ./bus not supported
hfsplus: trying to free free bnode 0(1)
hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5364 at fs/hfsplus/bnode.c:671 hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:671
Modules linked in:
CPU: 0 UID: 0 PID: 5364 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: c1 8b 89 ee e8 60 c1 8d fe e9 cf fc ff ff e8 56 ee 25 ff 4c 89 ef e8 ee fe e4 08 48 c7 c7 c0 cc c1 8b 89 ee e8 40 c1 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:ffffc9000d33ef20 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff8880337ac000 RCX: 693885b01f4b1100
RDX: ffffc9000e07a000 RSI: 00000000000009dc RDI: 00000000000009dd
RBP: 0000000000000000 R08: ffffc9000d33ec47 R09: 1ffff92001a67d88
R10: dffffc0000000000 R11: fffff52001a67d89 R12: 0000000000000000
R13: ffff8880337ac0e0 R14: ffff888032c6d300 R15: dffffc0000000000
FS:  00007f48c75f56c0(0000) GS:ffff88808d00a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000033587000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x5af/0x640 fs/hfsplus/btree.c:415
 hfs_btree_inc_height+0xf6/0xb60 fs/hfsplus/brec.c:475
 hfsplus_brec_insert+0x12d/0xcc0 fs/hfsplus/brec.c:75
 hfsplus_create_attr+0x30d/0x3a0 fs/hfsplus/attributes.c:252
 __hfsplus_setxattr+0x661/0x1fe0 fs/hfsplus/xattr.c:358
 hfsplus_setxattr+0x11e/0x180 fs/hfsplus/xattr.c:436
 hfsplus_user_setxattr+0x40/0x60 fs/hfsplus/xattr_user.c:30
 __vfs_setxattr+0x439/0x480 fs/xattr.c:200
 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234
 vfs_setxattr+0x16b/0x2f0 fs/xattr.c:321
 do_setxattr fs/xattr.c:636 [inline]
 filename_setxattr+0x274/0x600 fs/xattr.c:665
 path_setxattrat+0x364/0x3a0 fs/xattr.c:713
 __do_sys_setxattr fs/xattr.c:747 [inline]
 __se_sys_setxattr fs/xattr.c:743 [inline]
 __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:743
 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: 0033:0x7f48cb18eba9
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:00007f48c75f5038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f48cb3d5fa0 RCX: 00007f48cb18eba9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000200000000000
RBP: 00007f48cb211e19 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f48cb3d6038 R14: 00007f48cb3d5fa0 R15: 00007ffeb6eb5b48
 </TASK>