hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 1 PID: 9 at fs/hfs/bnode.c:432 hfs_bnode_create+0x3dd/0x460 fs/hfs/bnode.c:431
Modules linked in:
CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:hfs_bnode_create+0x3dd/0x460 fs/hfs/bnode.c:432
Code: 8a 44 89 e6 e8 f4 d4 ef 07 e9 4c fd ff ff e8 8a 0c 3d ff 4c 89 ef e8 b2 96 fa 07 48 c7 c7 c0 91 9f 8a 44 89 e6 e8 d3 d4 ef 07 <0f> 0b eb b5 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 59 fc ff ff 48 89
RSP: 0018:ffffc90000ce6e30 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff88806f154700 RCX: a773ed2a010ed600
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81668a3c R09: ffffed10172267a8
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff8880200640e0 R14: ffff888020064000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001f80 CR3: 0000000029325000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x64f/0x740 fs/hfs/btree.c:288
 hfs_btree_inc_height+0x11a/0xd20 fs/hfs/brec.c:471
 hfs_brec_insert+0x71f/0xbd0 fs/hfs/brec.c:148
 __hfs_ext_write_extent+0x2f2/0x4f0 fs/hfs/extent.c:124
 hfs_ext_write_extent+0x150/0x1d0 fs/hfs/extent.c:144
 hfs_write_inode+0xb8/0xec0 fs/hfs/inode.c:432
 write_inode fs/fs-writeback.c:1495 [inline]
 __writeback_single_inode+0x644/0xe30 fs/fs-writeback.c:1705
 writeback_sb_inodes+0xbce/0x1a40 fs/fs-writeback.c:1930
 wb_writeback+0x451/0xc50 fs/fs-writeback.c:2104
 wb_do_writeback fs/fs-writeback.c:2247 [inline]
 wb_workfn+0x46c/0x1130 fs/fs-writeback.c:2288
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>