hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7574 at fs/hfsplus/bnode.c:641 hfsplus_bnode_create+0x3d1/0x450 fs/hfsplus/bnode.c:640
Modules linked in:
CPU: 1 PID: 7574 Comm: syz.7.549 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:hfsplus_bnode_create+0x3d1/0x450 fs/hfsplus/bnode.c:641
Code: 6f 1f 8a 89 ee e8 4f f3 6c 07 e9 57 fd ff ff e8 55 50 4d ff 4c 89 ef e8 ad d2 80 07 48 c7 c7 a0 6f 1f 8a 89 ee e8 2f f3 6c 07 <0f> 0b eb b7 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 63 fc ff ff 4c
RSP: 0018:ffffc90002f9f0b0 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff8880236f8000 RCX: c977a4d07bb63e00
RDX: ffffc90010c89000 RSI: 000000000001b95a RDI: 000000000001b95b
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed10172267b0
R10: ffffed10172267b0 R11: 1ffff110172267af R12: 0000000000000000
R13: ffff8880236f80e0 R14: ffff888023239500 R15: dffffc0000000000
FS:  00007fe9b55166c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44b6bf3f98 CR3: 000000007e1a6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x692/0xa70 fs/hfsplus/btree.c:420
 hfs_bnode_split+0xc9/0xee0 fs/hfsplus/brec.c:245
 hfsplus_brec_insert+0x38b/0xcc0 fs/hfsplus/brec.c:100
 hfsplus_create_cat+0x3b0/0x1020 fs/hfsplus/catalog.c:292
 hfsplus_fill_super+0x12f6/0x1b90 fs/hfsplus/super.c:573
 mount_bdev+0x287/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe9b72b0eea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 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:00007fe9b5515e68 EFLAGS: 00000246
 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe9b5515ef0 RCX: 00007fe9b72b0eea
RDX: 0000200000000100 RSI: 0000200000002900 RDI: 00007fe9b5515eb0
RBP: 0000200000000100 R08: 00007fe9b5515ef0 R09: 0000000002000010
R10: 0000000002000010 R11: 0000000000000246 R12: 0000200000002900
R13: 00007fe9b5515eb0 R14: 00000000000006e0 R15: 0000200000000080
 </TASK>