hfsplus: new node 0 already hashed?
------------[ cut here ]------------
1
WARNING: fs/hfsplus/bnode.c:634 at hfsplus_bnode_create+0x45d/0x4f0 fs/hfsplus/bnode.c:634, CPU#0: syz.4.409/7936
Modules linked in:
CPU: 0 UID: 0 PID: 7936 Comm: syz.4.409 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:hfsplus_bnode_create+0x45d/0x4f0 fs/hfsplus/bnode.c:634
Code: 87 8b 89 ee e8 f4 4d 7e fe e9 cf fc ff ff e8 6a b7 1c ff 4c 89 f7 e8 c2 b3 9c 08 48 c7 c7 20 d0 87 8b 89 ee e8 d4 4d 7e fe 90 <0f> 0b 90 49 c7 c5 ef ff ff ff eb a9 44 89 f9 80 e1 07 80 c1 03 38
RSP: 0018:ffffc900038a7280 EFLAGS: 00010246
RAX: 0000000000000023 RBX: dffffc0000000000 RCX: 2be6b4783645ee00
RDX: ffffc90007181000 RSI: 0000000000004966 RDI: 0000000000004967
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000714e01 R12: 0000000000000000
R13: ffff88804cdec000 R14: ffff88804cdec0d0 R15: ffff88803830f400
FS:  00007fbcab9e66c0(0000) GS:ffff888125c46000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe52a7ca000 CR3: 0000000025a00000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hfs_btree_inc_height+0xf9/0xb50 fs/hfsplus/brec.c:483
 hfsplus_brec_insert+0x13f/0xde0 fs/hfsplus/brec.c:75
 hfsplus_create_attr_nolock+0x1d5/0x690 fs/hfsplus/attributes.c:250
 hfsplus_create_attr+0x213/0x3a0 fs/hfsplus/attributes.c:292
 __hfsplus_setxattr+0x706/0x2800 fs/hfsplus/xattr.c:453
 hfsplus_initxattrs+0x1ae/0x280 fs/hfsplus/xattr_security.c:59
 security_inode_init_security+0x29b/0x3e0 security/security.c:1370
 hfsplus_mknod+0x1de/0x3c0 fs/hfsplus/dir.c:536
 hfsplus_mkdir+0x2c/0x40 fs/hfsplus/dir.c:573
 vfs_mkdir+0x402/0x620 fs/namei.c:5276
 filename_mkdirat+0x289/0x520 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: 0033:0x7fbcad78cf47
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 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:00007fbcab9e5e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fbcab9e5ee0 RCX: 00007fbcad78cf47
RDX: 00000000000001ff RSI: 00002000000005c0 RDI: 00000000ffffff9c
RBP: 0000200000000b00 R08: 0000200000000140 R09: 0000000000000000
R10: 0000200000000b00 R11: 0000000000000246 R12: 00002000000005c0
R13: 00007fbcab9e5ea0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>