hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6679 at fs/hfsplus/bnode.c:590 hfsplus_bnode_create+0x3d1/0x450 fs/hfsplus/bnode.c:589
Modules linked in:
CPU: 1 PID: 6679 Comm: syz.6.476 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:hfsplus_bnode_create+0x3d1/0x450 fs/hfsplus/bnode.c:590
Code: 4a 1f 8a 89 ee e8 1f 69 73 07 e9 57 fd ff ff e8 35 7e 4d ff 4c 89 ef e8 4d 54 87 07 48 c7 c7 a0 4a 1f 8a 89 ee e8 ff 68 73 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:ffffc90003a2efd0 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff88807bef2000 RCX: 846c4fd9a5436500
RDX: ffffc90011184000 RSI: 000000000000c75e RDI: 000000000000c75f
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed10172067a8
R10: ffffed10172067a8 R11: 1ffff110172067a7 R12: 0000000000000000
R13: ffff88807bef20e0 R14: ffff88805f66fa00 R15: dffffc0000000000
FS:  00007fa1a0cf96c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558e6d33c078 CR3: 00000000674cc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x594/0x640 fs/hfsplus/btree.c:414
 hfs_btree_inc_height+0xf3/0xb60 fs/hfsplus/brec.c:475
 hfsplus_brec_insert+0x12a/0xcc0 fs/hfsplus/brec.c:75
 hfsplus_create_attr+0x44e/0x5f0 fs/hfsplus/attributes.c:252
 __hfsplus_setxattr+0x67c/0x1e20 fs/hfsplus/xattr.c:354
 hfsplus_setxattr+0xac/0xe0 fs/hfsplus/xattr.c:434
 hfsplus_user_setxattr+0x3c/0x50 fs/hfsplus/xattr_user.c:30
 __vfs_setxattr+0x3e0/0x420 fs/xattr.c:182
 __vfs_setxattr_noperm+0x129/0x5e0 fs/xattr.c:216
 vfs_setxattr+0x168/0x2f0 fs/xattr.c:303
 do_setxattr fs/xattr.c:588 [inline]
 setxattr+0x2da/0x300 fs/xattr.c:611
 path_setxattr+0x142/0x280 fs/xattr.c:630
 __do_sys_setxattr fs/xattr.c:646 [inline]
 __se_sys_setxattr fs/xattr.c:642 [inline]
 __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:642
 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: 0033:0x7fa1a2ab2be9
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:00007fa1a0cf9038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007fa1a2cda090 RCX: 00007fa1a2ab2be9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000200000000040
RBP: 00007fa1a2b35e19 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa1a2cda128 R14: 00007fa1a2cda090 R15: 00007fffcf979018
 </TASK>