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
  allowing incompatible features above 0.0: (unknown version)
  features: lz4,new_siphash,inline_data,new_extent_overwrite,btree_ptr_v2,new_varint,journal_no_flush,alloc_v2,extents_across_btree_nodes
bcachefs (loop0): Using encoding defined by superblock: utf8-12.1.0
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 1.28: inode_has_case_insensitive
  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,check_rebalance_work,set_fs_needs_rebalance
bcachefs (loop0): btree node read error at btree extents level 0/0
  u64s 11 type btree_ptr_v2 576460752303423487:U64_MAX:U32_MAX len 0 ver 0: seq c6c25c03258c59c5 written 65535 min_key R POS_MIN durability: 1 ptr: 0:27:0 gen 0
  loop0 node offset 8/65535: btree node data missing: expected 65535 sectors, found 8
  loop0 btree validate error
  repair success (rewriting node)
bcachefs (loop0): accounting_read... done
bcachefs (loop0): alloc_read... done
bcachefs (loop0): snapshots_read... done
bcachefs (loop0): check_allocations...
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
------------[ cut here ]------------
kernel BUG at fs/bcachefs/btree_iter.c:633!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5342 Comm: syz.0.0 Not tainted 6.16.0-rc6-syzkaller-00002-g155a3c003e55 #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_btree_path_level_init+0x9f1/0xa20 fs/bcachefs/btree_iter.c:633
Code: 89 f7 e8 d2 fc 01 fe e9 91 fb ff ff e8 08 7d 9e fd 90 0f 0b e8 00 7d 9e fd 90 0f 0b e8 f8 7c 9e fd 90 0f 0b e8 f0 7c 9e fd 90 <0f> 0b e8 e8 7c 9e fd 90 0f 0b e8 e0 7c 9e fd 90 0f 0b e8 d8 7c 9e
RSP: 0018:ffffc9000d37e540 EFLAGS: 00010283
RAX: ffffffff8421b680 RBX: ffff88805445c360 RCX: 0000000000100000
RDX: ffffc9000e20a000 RSI: 0000000000069e01 RDI: 0000000000069e02
RBP: ffff8880524231a7 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52001a6fc9c R12: 07ffffffffffffff
R13: 0800000000000000 R14: dffffc0000000000 R15: ffffffffffffffff
FS:  00007fa9f73ab6c0(0000) GS:ffff88808d21b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ffbb279730 CR3: 0000000043ad1000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 btree_path_lock_root fs/bcachefs/btree_iter.c:787 [inline]
 bch2_btree_path_traverse_one+0xfec/0x21d0 fs/bcachefs/btree_iter.c:1203
 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:250 [inline]
 __bch2_btree_iter_peek fs/bcachefs/btree_iter.c:2267 [inline]
 bch2_btree_iter_peek_max+0x9e8/0x58f0 fs/bcachefs/btree_iter.c:2384
 bch2_btree_iter_peek_max_type fs/bcachefs/btree_iter.h:743 [inline]
 bch2_gc_btree fs/bcachefs/btree_gc.c:729 [inline]
 bch2_gc_btrees fs/bcachefs/btree_gc.c:792 [inline]
 bch2_check_allocations+0x120d/0x57b0 fs/bcachefs/btree_gc.c:1094
 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:484 [inline]
 __bch2_run_recovery_passes+0x392/0x1010 fs/bcachefs/recovery_passes.c:539
 bch2_run_recovery_passes+0x184/0x210 fs/bcachefs/recovery_passes.c:610
 bch2_fs_recovery+0x2690/0x3a50 fs/bcachefs/recovery.c:1016
 bch2_fs_start+0xaaf/0xda0 fs/bcachefs/super.c:1213
 bch2_fs_get_tree+0xb39/0x1520 fs/bcachefs/fs.c:2488
 vfs_get_tree+0x8f/0x2b0 fs/super.c:1804
 do_new_mount+0x24a/0xa40 fs/namespace.c:3902
 do_mount fs/namespace.c:4239 [inline]
 __do_sys_mount fs/namespace.c:4450 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4427
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa9f65900ca
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:00007fa9f73aae68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fa9f73aaef0 RCX: 00007fa9f65900ca
RDX: 00002000000000c0 RSI: 0000200000000000 RDI: 00007fa9f73aaeb0
RBP: 00002000000000c0 R08: 00007fa9f73aaef0 R09: 0000000001000c10
R10: 0000000001000c10 R11: 0000000000000246 R12: 0000200000000000
R13: 00007fa9f73aaeb0 R14: 0000000000005951 R15: 0000200000000280
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bch2_btree_path_level_init+0x9f1/0xa20 fs/bcachefs/btree_iter.c:633
Code: 89 f7 e8 d2 fc 01 fe e9 91 fb ff ff e8 08 7d 9e fd 90 0f 0b e8 00 7d 9e fd 90 0f 0b e8 f8 7c 9e fd 90 0f 0b e8 f0 7c 9e fd 90 <0f> 0b e8 e8 7c 9e fd 90 0f 0b e8 e0 7c 9e fd 90 0f 0b e8 d8 7c 9e
RSP: 0018:ffffc9000d37e540 EFLAGS: 00010283
RAX: ffffffff8421b680 RBX: ffff88805445c360 RCX: 0000000000100000
RDX: ffffc9000e20a000 RSI: 0000000000069e01 RDI: 0000000000069e02
RBP: ffff8880524231a7 R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52001a6fc9c R12: 07ffffffffffffff
R13: 0800000000000000 R14: dffffc0000000000 R15: ffffffffffffffff
FS:  00007fa9f73ab6c0(0000) GS:ffff88808d21b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ffbb279730 CR3: 0000000043ad1000 CR4: 0000000000352ef0