hfsplus: new node 0 already hashed?
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1
WARNING: fs/hfsplus/bnode.c:631 at hfsplus_bnode_create+0x45d/0x4f0 fs/hfsplus/bnode.c:631, CPU#1: syz.6.300/8241
Modules linked in:
CPU: 1 UID: 0 PID: 8241 Comm: syz.6.300 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:hfsplus_bnode_create+0x45d/0x4f0 fs/hfsplus/bnode.c:631
Code: 67 8b 89 ee e8 34 9f 84 fe e9 cf fc ff ff e8 4a bd 21 ff 4c 89 f7 e8 82 c7 83 08 48 c7 c7 e0 08 67 8b 89 ee e8 14 9f 84 fe 90 <0f> 0b 90 49 c7 c5 ef ff ff ff eb a9 44 89 f9 80 e1 07 80 c1 03 38
RSP: 0000:ffffc90005a66f40 EFLAGS: 00010246
RAX: 0000000000000023 RBX: dffffc0000000000 RCX: 4f27d603e86f2900
RDX: ffffc90017773000 RSI: 0000000000003fe2 RDI: 0000000000003fe3
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000b4cd99 R12: 0000000000000000
R13: ffff8880269b4000 R14: ffff8880269b40d0 R15: ffff8880364a2400
FS:  00007efc1dee66c0(0000) GS:ffff888126432000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa23c2d9000 CR3: 0000000064e48000 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+0x426/0x11c0 fs/hfsplus/catalog.c:292
 hfsplus_fill_super+0x129a/0x19e0 fs/hfsplus/super.c:605
 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694
 vfs_get_tree+0x92/0x2a0 fs/super.c:1754
 fc_mount fs/namespace.c:1193 [inline]
 do_new_mount_fc fs/namespace.c:3763 [inline]
 do_new_mount+0x341/0xd30 fs/namespace.c:3839
 do_mount fs/namespace.c:4172 [inline]
 __do_sys_mount fs/namespace.c:4361 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4338
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efc1fc8da8a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efc1dee5e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007efc1dee5ee0 RCX: 00007efc1fc8da8a
RDX: 0000200000000140 RSI: 0000200000000000 RDI: 00007efc1dee5ea0
RBP: 0000200000000140 R08: 00007efc1dee5ee0 R09: 0000000002000010
R10: 0000000002000010 R11: 0000000000000246 R12: 0000200000000000
R13: 00007efc1dee5ea0 R14: 0000000000000711 R15: 0000200000000c00
 </TASK>