hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: fs/hfsplus/bnode.c:631 at hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:631, CPU#1: syz.0.142/6778
Modules linked in:
CPU: 1 UID: 0 PID: 6778 Comm: syz.0.142 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:631
Code: 02 8b 89 ee e8 30 51 91 fe e9 cf fc ff ff e8 86 70 2a ff 4c 89 ef e8 be 4d 3f 08 48 c7 c7 40 10 02 8b 89 ee e8 10 51 91 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:ffffc9000ef47200 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888032ad2000 RCX: c0abeb2a52753400
RDX: ffffc9000f51a000 RSI: 0000000000001a69 RDI: 0000000000001a6a
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52001de8de5 R12: 0000000000000000
R13: ffff888032ad20d0 R14: ffff888028e38600 R15: dffffc0000000000
FS:  00007f5a06fed6c0(0000) GS:ffff888126e06000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8d6c083000 CR3: 000000003e7b2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x746/0xaf0 fs/hfsplus/btree.c:421
 hfs_btree_inc_height+0xf6/0xb60 fs/hfsplus/brec.c:475
 hfsplus_brec_insert+0x12e/0xd70 fs/hfsplus/brec.c:75
 hfsplus_create_attr+0x30a/0x470 fs/hfsplus/attributes.c:252
 __hfsplus_setxattr+0x66f/0x23f0 fs/hfsplus/xattr.c:356
 hfsplus_initxattrs+0x1ae/0x280 fs/hfsplus/xattr_security.c:59
 security_inode_init_security+0x290/0x3d0 security/security.c:1344
 hfsplus_mknod+0x1a9/0x290 fs/hfsplus/dir.c:498
 hfsplus_mkdir+0x2c/0x40 fs/hfsplus/dir.c:529
 vfs_mkdir+0x52d/0x5d0 fs/namei.c:5130
 do_mkdirat+0x27a/0x4b0 fs/namei.c:5164
 __do_sys_mkdirat fs/namei.c:5186 [inline]
 __se_sys_mkdirat fs/namei.c:5184 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:5184
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5a08dade97
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 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:00007f5a06fece68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f5a06fecef0 RCX: 00007f5a08dade97
RDX: 00000000000001ff RSI: 0000200000000040 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000040
R13: 00007f5a06feceb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>