syzbot

bcachefs (loop0): running explicit recovery pass reconstruct_snapshots (21), currently at snapshots_read (7)
 done
bcachefs (loop0): check_allocations...
bcachefs (loop0): btree ptr not marked in member info btree allocated bitmap
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq ac62141f8dc7e261 written 24 min_key POS_MIN durability: 1 ptr: 0:26:0 gen 0, fixing
bcachefs (loop0): bucket 0:26 data type btree ptr gen 0 missing in alloc btree
  while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq ac62141f8dc7e261 written 24 min_key POS_MIN durability: 1 ptr: 0:26:0 gen 0, fixing
bcachefs (loop0): btree ptr not marked in member info btree allocated bitmap
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 7589ab5e0c11cc7a written 24 min_key POS_MIN durability: 1 ptr: 0:38:0 gen 0, fixing
bcachefs (loop0): btree ptr not marked in member info btree allocated bitmap
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 9aa2895aefce4bdf written 24 min_key POS_MIN durability: 1 ptr: 0:41:0 gen 0, fixing
bcachefs (loop0): btree ptr not marked in member info btree allocated bitmap
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c0bef60d07ceb940 written 16 min_key POS_MIN durability: 1 ptr: 0:35:0 gen 0, fixing
bcachefs (loop0): btree ptr not marked in member info btree allocated bitmap
  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq e81e1ed936acf3df written 32 min_key POS_MIN durability: 1 ptr: 0:29:0 gen 0, fixing
bcachefs (loop0): bucket 0:15 gen 0 has wrong data_type: got free, should be journal, fixing
bcachefs (loop0): bucket 0:15 gen 0 data type journal has wrong dirty_sectors: got 0, should be 256, fixing
bcachefs (loop0): bucket 0:26 gen 0 has wrong data_type: got free, should be btree, fixing
bcachefs (loop0): bucket 0:26 gen 0 data type btree has wrong dirty_sectors: got 0, should be 256, fixing
bcachefs (loop0): bucket 0:32 gen 0 has wrong data_type: got btree, should be need_discard, fixing
bcachefs (loop0): bucket 0:32 gen 0 data type need_discard has wrong dirty_sectors: got 256, should be 0, fixing
 done
bcachefs (loop0): going read-write
bcachefs (loop0): journal_replay... done
bcachefs (loop0): check_lrus... done
bcachefs (loop0): check_backpointers_to_extents... done
bcachefs (loop0): check_extents_to_backpointers...
bcachefs (loop0): scanning for missing backpointers in 4/128 buckets
 done
bcachefs (loop0): reconstruct_snapshots...
bcachefs (loop0): snapshot node 4294967295 from tree 4294967295 missing, recreating
 done
bcachefs (loop0): check_inodes... done
bcachefs (loop0): resume_logged_ops... done
bcachefs (loop0): delete_dead_inodes... done
bcachefs (loop0): Fixed errors, running fsck a second time to verify fs is clean
bcachefs (loop0): check_lrus... done
bcachefs (loop0): check_backpointers_to_extents... done
bcachefs (loop0): check_extents_to_backpointers...
bcachefs (loop0): scanning for missing backpointers in 1/128 buckets
 done
bcachefs (loop0): reconstruct_snapshots... done
bcachefs (loop0): check_inodes... done
bcachefs (loop0): resume_logged_ops... done
bcachefs (loop0): delete_dead_inodes... done
bcachefs (loop0): done starting filesystem
bcachefs (loop0): dirent to missing inode:
  u64s 7 type dirent 4096:189491840996961599:U32_MAX len 0 ver 0: file0 -> 4098 type dir
  
------------[ cut here ]------------
kernel BUG at fs/bcachefs/fs.c:1017!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5313 Comm: syz.0.0 Not tainted 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:bch2_rename2+0x131d/0x1340 fs/bcachefs/fs.c:1017
Code: 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 43 fa ff ff 4c 89 ff 48 89 f3 e8 e1 33 ef fd 48 89 de e9 30 fa ff ff e8 b4 3a 8d fd 90 <0f> 0b e8 ac 3a 8d fd 90 0f 0b e8 a4 3a 8d fd e9 93 f9 ff ff 66 66
RSP: 0018:ffffc9000eee76a0 EFLAGS: 00010283
RAX: ffffffff8432b73c RBX: 0000000000001005 RCX: 0000000000100000
RDX: ffffc9000de4a000 RSI: 000000000000361e RDI: 000000000000361f
RBP: ffffc9000eee7b90 R08: ffff888055fcc1d7 R09: 1ffff1100abf983a
R10: dffffc0000000000 R11: ffffed100abf983b R12: ffff888054a596c8
R13: dffffc0000000000 R14: 0000000000001002 R15: ffff888054a58000
FS:  00007f2e784256c0(0000) GS:ffff88808d6c7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001920 CR3: 0000000042f6d000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vfs_rename+0xb99/0xec0 fs/namei.c:5121
 do_renameat2+0x878/0xc50 fs/namei.c:5270
 __do_sys_rename fs/namei.c:5317 [inline]
 __se_sys_rename fs/namei.c:5315 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5315
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2e7758e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2e78425038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f2e777b5fa0 RCX: 00007f2e7758e969
RDX: 0000000000000000 RSI: 0000200000001900 RDI: 0000200000000140
RBP: 00007f2e77610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2e777b5fa0 R15: 00007fff47d97178
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bch2_rename2+0x131d/0x1340 fs/bcachefs/fs.c:1017
Code: 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 43 fa ff ff 4c 89 ff 48 89 f3 e8 e1 33 ef fd 48 89 de e9 30 fa ff ff e8 b4 3a 8d fd 90 <0f> 0b e8 ac 3a 8d fd 90 0f 0b e8 a4 3a 8d fd e9 93 f9 ff ff 66 66
RSP: 0018:ffffc9000eee76a0 EFLAGS: 00010283
RAX: ffffffff8432b73c RBX: 0000000000001005 RCX: 0000000000100000
RDX: ffffc9000de4a000 RSI: 000000000000361e RDI: 000000000000361f
RBP: ffffc9000eee7b90 R08: ffff888055fcc1d7 R09: 1ffff1100abf983a
R10: dffffc0000000000 R11: ffffed100abf983b R12: ffff888054a596c8
R13: dffffc0000000000 R14: 0000000000001002 R15: ffff888054a58000
FS:  00007f2e784256c0(0000) GS:ffff88808d6c7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2e78403fc8 CR3: 0000000042f6d000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400