loop0: detected capacity change from 0 to 32768
bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,compression=lz4,nojournal_transaction_names
bcachefs (loop0): recovering from clean shutdown, journal seq 10
bcachefs (loop0): Version upgrade required:
Version upgrade from 0.24: unwritten_extents to 1.7: mi_btree_bitmap incomplete
Doing incompatible version upgrade from 0.24: unwritten_extents to 1.13: inode_has_child_snapshots
  running recovery passes: check_allocations,check_alloc_info,check_lrus,check_btree_backpointers,check_backpointers_to_extents,check_extents_to_backpointers,check_alloc_to_lru_refs,bucket_gens_init,check_snapshot_trees,check_snapshots,check_subvols,check_subvol_children,delete_dead_snapshots,check_inodes,check_extents,check_indirect_extents,check_dirents,check_xattrs,check_root,check_unreachable_inodes,check_subvolume_structure,check_directory_structure,check_nlinks,set_fs_needs_rebalance
invalid bkey u64s 12 type alloc_v4 0:34:0 len 0 ver 0: 
  gen 0 oldest_gen 0 data_type (unknown data_type 130)
  journal_seq       5
  need_discard      1
  need_inc_gen      1
  dirty_sectors     0
  stripe_sectors    0
  cached_sectors    0
  stripe            0
  stripe_redundancy 27
  io_time[READ]     1
  io_time[WRITE]    512
  fragmentation     0
  bp_start          8
  invalid data type (got 130 should be 9): delete?, fixing
bcachefs (loop0): accounting_read... done
bcachefs (loop0): alloc_read... done
bcachefs (loop0): stripes_read... done
bcachefs (loop0): snapshots_read... done
bcachefs (loop0): check_allocations...
bucket 0:34 data type user ptr gen 0 missing in alloc btree
while marking u64s 7 type extent 4099:8:U32_MAX len 8 ver 0: durability: 1 crc: c_size 8 size 8 offset 0 nonce 0 csum none 0:0  compress incompressible ptr: 0:34:0 gen 0, fixing
bucket 0:34 gen 0 has wrong data_type: got free, should be user, fixing
bucket 0:34 gen 0 data type user has wrong dirty_sectors: got 0, should be 16, fixing
 done
bcachefs (loop0): going read-write
bcachefs (loop0): journal_replay... done
bcachefs (loop0): check_alloc_info... done
bcachefs (loop0): check_lrus... done
bcachefs (loop0): check_btree_backpointers... done
bcachefs (loop0): check_backpointers_to_extents... done
bcachefs (loop0): check_extents_to_backpointers...
missing backpointer for btree=extents l=1 u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 16 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0
  got:   u64s 9 type 48 0:7077888:0 len 0 ver 0: 
  want:  u64s 9 type backpointer 0:7077888:0 len 0 ver 0: bucket=0:27:0 btree=extents l=1 offset=0:0 len=256 pos=SPOS_MAX, fixing
------------[ cut here ]------------
kernel BUG at fs/bcachefs/btree_cache.h:131!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5314 Comm: syz.0.0 Not tainted 6.13.0-rc1-syzkaller-00182-gb8f52214c61a #0
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_btree_id_root fs/bcachefs/btree_cache.h:131 [inline]
RIP: 0010:btree_path_lock_root fs/bcachefs/btree_iter.c:723 [inline]
RIP: 0010:bch2_btree_path_traverse_one+0x28de/0x2940 fs/bcachefs/btree_iter.c:1183
Code: f3 8e 48 89 de e8 f2 38 dd 00 e9 78 f8 ff ff e8 e8 df 79 fd 90 0f 0b e8 a0 ca aa 07 e8 db df 79 fd 90 0f 0b e8 d3 df 79 fd 90 <0f> 0b e8 cb df 79 fd 90 0f 0b e8 c3 df 79 fd 90 0f 0b 48 8b 4c 24
RSP: 0018:ffffc9000d36dd00 EFLAGS: 00010287
RAX: ffffffff8425923d RBX: ffff888052b80000 RCX: 0000000000100000
RDX: ffffc9000f102000 RSI: 00000000000e24ed RDI: 00000000000e24ee
RBP: ffffc9000d36dff0 R08: ffffffff84258289 R09: ffffffff842552e9
R10: 0000000000000002 R11: ffff888000f32440 R12: dffffc0000000000
R13: 0000000000000005 R14: ffff8880542cc380 R15: 0000000000000000
FS:  00007f852050c6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056272f73c0b8 CR3: 000000003eb58000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline]
 bch2_btree_iter_peek_node+0x223/0xed0 fs/bcachefs/btree_iter.c:1901
 bch2_backpointer_get_node+0x2d2/0x880 fs/bcachefs/backpointers.c:369
 bch2_backpointer_get_key+0x61c/0x970 fs/bcachefs/backpointers.c:340
 check_bp_exists fs/bcachefs/backpointers.c:584 [inline]
 check_extent_to_backpointers+0x21f9/0x46b0 fs/bcachefs/backpointers.c:688
 bch2_check_extents_to_backpointers_pass fs/bcachefs/backpointers.c:884 [inline]
 bch2_check_extents_to_backpointers+0x1190/0x1bf0 fs/bcachefs/backpointers.c:937
 bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:191
 bch2_run_recovery_passes+0x3a7/0x880 fs/bcachefs/recovery_passes.c:244
 bch2_fs_recovery+0x25cc/0x39d0 fs/bcachefs/recovery.c:861
 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1037
 bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2170
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f851f78167a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f852050be88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f852050bf10 RCX: 00007f851f78167a
RDX: 00000000200002c0 RSI: 0000000020000380 RDI: 00007f852050bed0
RBP: 00000000200002c0 R08: 00007f852050bf10 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000380
R13: 00007f852050bed0 R14: 000000000000591a R15: 0000000020000300
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bch2_btree_id_root fs/bcachefs/btree_cache.h:131 [inline]
RIP: 0010:btree_path_lock_root fs/bcachefs/btree_iter.c:723 [inline]
RIP: 0010:bch2_btree_path_traverse_one+0x28de/0x2940 fs/bcachefs/btree_iter.c:1183
Code: f3 8e 48 89 de e8 f2 38 dd 00 e9 78 f8 ff ff e8 e8 df 79 fd 90 0f 0b e8 a0 ca aa 07 e8 db df 79 fd 90 0f 0b e8 d3 df 79 fd 90 <0f> 0b e8 cb df 79 fd 90 0f 0b e8 c3 df 79 fd 90 0f 0b 48 8b 4c 24
RSP: 0018:ffffc9000d36dd00 EFLAGS: 00010287
RAX: ffffffff8425923d RBX: ffff888052b80000 RCX: 0000000000100000
RDX: ffffc9000f102000 RSI: 00000000000e24ed RDI: 00000000000e24ee
RBP: ffffc9000d36dff0 R08: ffffffff84258289 R09: ffffffff842552e9
R10: 0000000000000002 R11: ffff888000f32440 R12: dffffc0000000000
R13: 0000000000000005 R14: ffff8880542cc380 R15: 0000000000000000
FS:  00007f852050c6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056272f73c0b8 CR3: 000000003eb58000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400