hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 20993 at fs/hfs/bnode.c:421 hfs_bnode_create.cold+0x1c/0x44 fs/hfs/bnode.c:420
Modules linked in:
CPU: 0 PID: 20993 Comm: syz-executor.0 Not tainted 6.1.0-syzkaller-14594-g72a85e2b0a1e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:hfs_bnode_create.cold+0x1c/0x44 fs/hfs/bnode.c:421
Code: a0 5a 66 8a e8 b6 f0 fb ff e9 6e 59 84 f8 e8 70 22 bd f7 4c 89 f7 e8 d8 45 45 00 44 89 ee 48 c7 c7 e0 5a 66 8a e8 95 f0 fb ff <0f> 0b e9 7b 60 84 f8 e8 4d 22 bd f7 44 89 ee 48 c7 c7 20 59 66 8a
RSP: 0018:ffffc900156bf310 EFLAGS: 00010286
RAX: 000000000000001f RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff8165927c RDI: fffff52002ad7e54
RBP: ffff8880805f0000 R08: 000000000000001f R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffff88802c8a9f00
R13: 0000000000000000 R14: ffff8880805f00e0 R15: 0000000000000000
FS:  00007f5a9c309700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000016948c8 CR3: 000000007c196000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfs_bmap_alloc+0x51b/0x5b0 fs/hfs/btree.c:291
 hfs_btree_inc_height.isra.0+0xe6/0x950 fs/hfs/brec.c:471
 hfs_brec_insert+0x851/0xbb0 fs/hfs/brec.c:148
 __hfs_ext_write_extent+0x3ec/0x510 fs/hfs/extent.c:124
 __hfs_ext_cache_extent fs/hfs/extent.c:174 [inline]
 hfs_ext_read_extent+0x81c/0xa20 fs/hfs/extent.c:202
 hfs_extend_file+0x4b5/0xae0 fs/hfs/extent.c:401
 hfs_get_block+0x17f/0x820 fs/hfs/extent.c:353
 get_more_blocks fs/direct-io.c:665 [inline]
 do_direct_IO fs/direct-io.c:953 [inline]
 __blockdev_direct_IO+0x1682/0x38e0 fs/direct-io.c:1266
 blockdev_direct_IO include/linux/fs.h:3213 [inline]
 hfs_direct_IO+0x10e/0x2d0 fs/hfs/inode.c:138
 generic_file_direct_write+0x239/0x560 mm/filemap.c:3696
 __generic_file_write_iter+0x1a6/0x500 mm/filemap.c:3856
 generic_file_write_iter+0xe3/0x350 mm/filemap.c:3932
 call_write_iter include/linux/fs.h:2186 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x9ed/0xdd0 fs/read_write.c:584
 ksys_write+0x12b/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5a9b68c0a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5a9c309168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5a9b7abf80 RCX: 00007f5a9b68c0a9
RDX: 00000000000ffe00 RSI: 0000000020004200 RDI: 0000000000000004
RBP: 00007f5a9c3091d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff0b3f1bbf R14: 00007f5a9c309300 R15: 0000000000022000
 </TASK>