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#0: syz.5.899/9970
Modules linked in:
CPU: 0 UID: 0 PID: 9970 Comm: syz.5.899 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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: a2 8b 89 ee e8 f0 e7 86 fe e9 cf fc ff ff e8 56 f6 20 ff 4c 89 ef e8 8e 8c bf 08 48 c7 c7 00 8a a2 8b 89 ee e8 d0 e7 86 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:ffffc9000b7e6f20 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888057a56000 RCX: c5c85e57c1515e00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa948 R12: 0000000000000000
R13: ffff888057a560e0 R14: ffff888144380b00 R15: dffffc0000000000
FS:  00007f6dac5406c0(0000) GS:ffff888125c25000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556a256608 CR3: 00000000766a0000 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+0x66b/0x2170 fs/hfsplus/xattr.c:356
 hfsplus_setxattr+0x11e/0x180 fs/hfsplus/xattr.c:434
 hfsplus_security_setxattr+0x40/0x60 fs/hfsplus/xattr_security.c:31
 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200
 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234
 vfs_setxattr+0x162/0x360 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_lsetxattr fs/xattr.c:754 [inline]
 __se_sys_lsetxattr fs/xattr.c:750 [inline]
 __x64_sys_lsetxattr+0xbf/0xe0 fs/xattr.c:750
 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: 0033:0x7f6dab78f749
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:00007f6dac540038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f6dab9e6090 RCX: 00007f6dab78f749
RDX: 0000000000000000 RSI: 0000200000000100 RDI: 00002000000000c0
RBP: 00007f6dab813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6dab9e6128 R14: 00007f6dab9e6090 R15: 00007ffdecb23c98
 </TASK>