hfsplus: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5435 at fs/hfsplus/bnode.c:573 hfsplus_bnode_create+0x3b6/0x440 fs/hfsplus/bnode.c:573
Modules linked in:
CPU: 0 UID: 0 PID: 5435 Comm: syz.1.24 Not tainted 6.11.0-rc5-syzkaller-00176-g20371ba12063 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:hfsplus_bnode_create+0x3b6/0x440 fs/hfsplus/bnode.c:573
Code: 44 89 e6 e8 7c 20 2f 09 e9 78 fd ff ff e8 f2 31 15 ff 4c 89 ff e8 ba 39 3c 09 48 c7 c7 40 d1 01 8c 44 89 e6 e8 5b 20 2f 09 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:ffffc9000468f4f8 EFLAGS: 00010246
RAX: 0000000000000023 RBX: ffff88802b379700 RCX: a42d40b65d48dd00
RDX: ffffc900092e1000 RSI: 000000000000ad3e RDI: 000000000000ad3f
RBP: 0000000000000000 R08: ffffffff817400ec R09: 1ffff920008d1e40
R10: dffffc0000000000 R11: fffff520008d1e41 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff888030284000 R15: ffff8880302840e0
FS:  00007ff5b30c86c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9813fa9440 CR3: 000000002f4a4000 CR4: 00000000003506f0
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+0xef5/0x1b70 fs/hfsplus/catalog.c:308
 hfsplus_mknod+0x16a/0x2a0 fs/hfsplus/dir.c:494
 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4210
 do_mkdirat+0x264/0x3a0 fs/namei.c:4233
 __do_sys_mkdir fs/namei.c:4253 [inline]
 __se_sys_mkdir fs/namei.c:4251 [inline]
 __x64_sys_mkdir+0x6c/0x80 fs/namei.c:4251
 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: 0033:0x7ff5b2379ef9
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:00007ff5b30c8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ff5b2515f80 RCX: 00007ff5b2379ef9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007ff5b23e793e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff5b2515f80 R15: 00007fffb9c7a788
 </TASK>