hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12 at fs/hfs/bnode.c:422 hfs_bnode_create+0x3b6/0x440 fs/hfs/bnode.c:422
Modules linked in:
CPU: 0 UID: 0 PID: 12 Comm: kworker/u4:1 Not tainted 6.12.0-rc7-syzkaller-00187-gf868cd251776 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:hfs_bnode_create+0x3b6/0x440 fs/hfs/bnode.c:422
Code: 44 89 e6 e8 cc 18 3c 09 e9 78 fd ff ff e8 72 3a 0c ff 4c 89 ff e8 2a e5 48 09 48 c7 c7 80 45 22 8c 44 89 e6 e8 ab 18 3c 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:ffffc900003e6cb8 EFLAGS: 00010246
RAX: 000000000000001f RBX: ffff888034387500 RCX: 4a77deabc60f9200
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8174b13c R09: 1ffff9200007cd34
R10: dffffc0000000000 R11: fffff5200007cd35 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880447ba000 R15: ffff8880447ba0e0
FS:  0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005611ca6a2ea0 CR3: 000000000e734000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x5a6/0x650 fs/hfs/btree.c:291
 hfs_btree_inc_height+0x11e/0xd20 fs/hfs/brec.c:471
 hfs_brec_insert+0x15b/0xbd0 fs/hfs/brec.c:77
 __hfs_ext_write_extent+0x2f2/0x4f0 fs/hfs/extent.c:124
 hfs_ext_write_extent+0x154/0x1d0 fs/hfs/extent.c:144
 hfs_write_inode+0xbc/0xec0 fs/hfs/inode.c:429
 write_inode fs/fs-writeback.c:1503 [inline]
 __writeback_single_inode+0x711/0x10d0 fs/fs-writeback.c:1723
 writeback_sb_inodes+0x80c/0x1370 fs/fs-writeback.c:1954
 __writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2025
 wb_writeback+0x42f/0xbd0 fs/fs-writeback.c:2136
 wb_check_background_flush fs/fs-writeback.c:2206 [inline]
 wb_do_writeback fs/fs-writeback.c:2294 [inline]
 wb_workfn+0xc58/0x1090 fs/fs-writeback.c:2321
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>