hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6101 at fs/hfsplus/bnode.c:573 hfsplus_bnode_create+0x3b6/0x440 fs/hfsplus/bnode.c:573
Modules linked in:
CPU: 0 UID: 0 PID: 6101 Comm: syz.3.27 Not tainted 6.14.0-rc5-syzkaller-00234-gb7c90e3e717a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:hfsplus_bnode_create+0x3b6/0x440 fs/hfsplus/bnode.c:573
Code: 44 89 e6 e8 2c cf 83 fe e9 78 fd ff ff e8 d2 ab 1e ff 4c 89 ff e8 4a 81 60 09 48 c7 c7 40 09 41 8c 44 89 e6 e8 0b cf 83 fe 90 <0f> 0b 90 eb af 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 83 fc ff ff 48
RSP: 0018:ffffc9000bd5f098 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff888031f1e500 RCX: 07f8cf37bdbbe600
RDX: ffffc9000d453000 RSI: 00000000000046d2 RDI: 00000000000046d3
RBP: 0000000000000000 R08: ffffffff81a1352c R09: 1ffff920017abdb0
R10: dffffc0000000000 R11: fffff520017abdb1 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888048e64000 R15: ffff888048e640e0
FS:  00007f1b91c3a6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3b548a CR3: 000000007e238000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x59a/0x640 fs/hfsplus/btree.c:415
 hfs_bnode_split+0xde/0x1110 fs/hfsplus/brec.c:245
 hfsplus_brec_insert+0x3a6/0xde0 fs/hfsplus/brec.c:100
 hfsplus_create_cat+0x49a/0x1b70 fs/hfsplus/catalog.c:292
 hfsplus_mknod+0x16a/0x2a0 fs/hfsplus/dir.c:494
 lookup_open fs/namei.c:3651 [inline]
 open_last_lookups fs/namei.c:3750 [inline]
 path_openat+0x193c/0x3590 fs/namei.c:3986
 do_filp_open+0x27f/0x4e0 fs/namei.c:4016
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
 do_sys_open fs/open.c:1443 [inline]
 __do_sys_creat fs/open.c:1521 [inline]
 __se_sys_creat fs/open.c:1515 [inline]
 __x64_sys_creat+0x123/0x170 fs/open.c:1515
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1b90d8d169
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:00007f1b91c3a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f1b90fa5fa0 RCX: 00007f1b90d8d169
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000400000000100
RBP: 00007f1b90e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1b90fa5fa0 R15: 00007ffde4a58e98
 </TASK>