hfsplus: new node 0 already hashed?
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1
WARNING: fs/hfsplus/bnode.c:631 at hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:631, CPU#1: syz.2.304/7726
Modules linked in:
CPU: 1 UID: 0 PID: 7726 Comm: syz.2.304 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:hfsplus_bnode_create+0x461/0x4f0 fs/hfsplus/bnode.c:631
Code: 46 8b 89 ee e8 90 d6 89 fe e9 cf fc ff ff e8 06 b1 25 ff 4c 89 ef e8 be 32 72 08 48 c7 c7 80 c1 46 8b 89 ee e8 70 d6 89 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:ffffc90008a97080 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff88805fd42000 RCX: 00f553da13846e00
RDX: ffffc90013b4f000 RSI: 0000000000004aff RDI: 0000000000004b00
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52001152dc1 R12: 0000000000000000
R13: ffff88805fd420d0 R14: ffff8880299b4600 R15: dffffc0000000000
FS:  00007ff7f0f5e6c0(0000) GS:ffff8881266c9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557e3cdc44b0 CR3: 00000000299ce000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x747/0xb00 fs/hfsplus/btree.c:421
 hfs_bnode_split+0xd4/0x1090 fs/hfsplus/brec.c:245
 hfsplus_brec_insert+0x3bc/0xd70 fs/hfsplus/brec.c:100
 hfsplus_create_cat+0xa7d/0x11c0 fs/hfsplus/catalog.c:308
 hfsplus_mknod+0x16a/0x290 fs/hfsplus/dir.c:494
 lookup_open fs/namei.c:4449 [inline]
 open_last_lookups fs/namei.c:4549 [inline]
 path_openat+0x1902/0x3e70 fs/namei.c:4793
 do_filp_open+0x22d/0x490 fs/namei.c:4823
 do_sys_openat2+0x12f/0x220 fs/open.c:1430
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1447
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff7f358aeb9
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:00007ff7f0f5e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff7f3806360 RCX: 00007ff7f358aeb9
RDX: 0000000000028541 RSI: 0000200000000200 RDI: ffffffffffffff9c
RBP: 00007ff7f35f8c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000140 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff7f38063f8 R14: 00007ff7f3806360 R15: 00007ffec5608568
 </TASK>