hfs: new node 0 already hashed?
------------[ cut here ]------------
1
WARNING: fs/hfs/bnode.c:520 at hfs_bnode_create+0x461/0x4f0 fs/hfs/bnode.c:520, CPU#0: syz.9.636/10474
Modules linked in:
CPU: 0 UID: 0 PID: 10474 Comm: syz.9.636 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:hfs_bnode_create+0x461/0x4f0 fs/hfs/bnode.c:520
Code: 67 8b 89 ee e8 a0 c9 82 fe e9 cf fc ff ff e8 f6 e6 1f ff 4c 89 ef e8 ee 01 82 08 48 c7 c7 80 46 67 8b 89 ee e8 80 c9 82 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:ffffc900050ef2c0 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff8880297c4000 RCX: b342a277ad173f00
RDX: ffffc9000f3c1000 RSI: 0000000000000a48 RDI: 0000000000000a49
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000a1de09 R12: 0000000000000000
R13: ffff8880297c40d0 R14: ffff88803b0c3000 R15: dffffc0000000000
FS:  00007f4f479366c0(0000) GS:ffff888126332000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000003b50a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5c1/0x650 fs/hfs/btree.c:326
 hfs_bnode_split+0xd4/0x1090 fs/hfsplus/brec.c:245
 hfs_brec_insert+0x3a1/0xc90 fs/hfs/brec.c:102
 hfs_cat_create+0x518/0x800 fs/hfs/catalog.c:131
 hfs_create+0x75/0xe0 fs/hfs/dir.c:202
 lookup_open fs/namei.c:4489 [inline]
 open_last_lookups fs/namei.c:4589 [inline]
 path_openat+0x13b4/0x38a0 fs/namei.c:4833
 do_file_open+0x23e/0x4a0 fs/namei.c:4865
 do_sys_openat2+0x113/0x200 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1383
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f496dc819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4f47936028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f4f49955fa0 RCX: 00007f4f496dc819
RDX: 0000000000000042 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f4f49772c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000060 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4f49956038 R14: 00007f4f49955fa0 R15: 00007fff4a386c48
 </TASK>