hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4313 at fs/hfs/bnode.c:530 hfs_bnode_create+0x3d1/0x450 fs/hfs/bnode.c:529
Modules linked in:
CPU: 0 PID: 4313 Comm: kworker/u4:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:hfs_bnode_create+0x3d1/0x450 fs/hfs/bnode.c:530
Code: 86 1f 8a 89 ee e8 af 60 6b 07 e9 57 fd ff ff e8 b5 bd 4b ff 4c 89 ef e8 0d 40 7f 07 48 c7 c7 c0 86 1f 8a 89 ee e8 8f 60 6b 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:ffffc900030fee70 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff88807e3a2000 RCX: 1f6ea63412f51600
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed10172067b0
R10: ffffed10172067b0 R11: 1ffff110172067af R12: 0000000000000000
R13: ffff88807e3a20e0 R14: ffff8880790ee700 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc2ac36e48 CR3: 0000000029d99000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5b2/0x660 fs/hfs/btree.c:288
 hfs_btree_inc_height+0xf3/0xac0 fs/hfs/brec.c:490
 hfs_brec_insert+0x73e/0xbc0 fs/hfs/brec.c:148
 __hfs_ext_write_extent+0x2a1/0x470 fs/hfs/extent.c:124
 hfs_ext_write_extent+0x15e/0x1e0 fs/hfs/extent.c:144
 hfs_write_inode+0x8e/0x970 fs/hfs/inode.c:432