hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 1 PID: 15393 at fs/hfsplus/bnode.c:671 hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:671
Modules linked in:
CPU: 1 UID: 0 PID: 15393 Comm: syz.3.1206 Tainted: G        W           6.17.0-rc1-syzkaller-00214-g99bade344cfa #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:671
Code: 21 8b 89 ee e8 00 83 99 fe e9 cf fc ff ff e8 96 8d 30 ff 4c 89 ef e8 ae 94 6a 08 48 c7 c7 80 43 21 8b 89 ee e8 e0 82 99 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:ffffc90005487500 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888034e58000 RCX: 002ee7449349a700
RDX: ffffc9000dacb000 RSI: 0000000000003410 RDI: 0000000000003411
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000a90e45 R12: 0000000000000000
R13: ffff888034e580d0 R14: ffff888032c54c00 R15: dffffc0000000000
FS:  00007f4924de66c0(0000) GS:ffff8881269c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff810c05d58 CR3: 0000000068184000 CR4: 00000000003526f0
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+0x3b6/0x1020 fs/hfsplus/catalog.c:292
 hfsplus_mknod+0x16a/0x290 fs/hfsplus/dir.c:494
 hfsplus_mkdir+0x2c/0x40 fs/hfsplus/dir.c:529
 vfs_mkdir+0x306/0x510 fs/namei.c:4366
 do_mkdirat+0x247/0x590 fs/namei.c:4399
 __do_sys_mkdirat fs/namei.c:4416 [inline]
 __se_sys_mkdirat fs/namei.c:4414 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4414
 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: 0033:0x7f4926b7ebe9
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:00007f4924de6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f4926da5fa0 RCX: 00007f4926b7ebe9
RDX: 0000000000000000 RSI: 00002000000005c0 RDI: ffffffffffffff9c
RBP: 00007f4926c01e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4926da6038 R14: 00007f4926da5fa0 R15: 00007ffe6e632d28
 </TASK>