bcachefs (loop0): error validating btree node at btree alloc level 0/0 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 node offset 8/24 bset u64s 375 bset byte offset 2968: keys out of order: u64s 11 type alloc_v4 3096224743817216:126:0 len 0 ver 0 > u64s 11 type alloc_v4 0:127:0 len 0 ver 0, fixing invalid bkey in btree_node btree=alloc level=0: u64s 11 type alloc_v4 0:2:0 len 0 ver 0: gen 0 oldest_gen 0 data_type need_gc_gens journal_seq_nonempty 1 journal_seq_empty 0 need_discard 1 need_inc_gen 1 dirty_sectors 256 stripe_sectors 0 cached_sectors 0 stripe 0 stripe_redundancy 0 io_time[READ] 1 io_time[WRITE] 1 fragmentation 0 bp_start 8 empty data type free but have data 0.256.0 0: delete?, fixing bcachefs (loop0): btree_node_read_work: rewriting btree node at due to error btree=alloc level=0 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 bcachefs (loop0): scan_for_btree_nodes... bcachefs (loop0): btree node scan found 7 nodes after overwrites done bcachefs (loop0): check_topology... bcachefs (loop0): btree root extents unreadable, must recover from scan bcachefs (loop0): bch2_get_scanned_nodes(): recovery btree=extents level=0 POS_MIN - SPOS_MAX bcachefs (loop0): bch2_get_scanned_nodes(): recovering 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 done 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 0:2 gen 0 has wrong data_type: got free, should be sb, fixing bucket 0:2 gen 0 data type sb has wrong dirty_sectors: got 0, should be 256, fixing bucket 0:121 gen 0 data type sb has wrong cached_sectors: got 589824, should be 0, fixing bucket 0:126 gen 0 has wrong data_type: got free, should be sb, fixing bucket 0:126 gen 0 data type sb has wrong dirty_sectors: got 0, should be 256, fixing bucket 0:127 gen 0 has wrong data_type: got free, should be sb, fixing bucket 0:127 gen 0 data type sb has wrong dirty_sectors: got 0, should be 256, 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... ------------[ cut here ]------------ kernel BUG at fs/bcachefs/backpointers.c:841! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5315 Comm: syz.0.0 Not tainted 6.13.0-syzkaller-05252-gbc8198dc7ebc #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:data_type_to_alloc_counter fs/bcachefs/backpointers.c:841 [inline] RIP: 0010:check_bucket_backpointer_mismatch fs/bcachefs/backpointers.c:892 [inline] RIP: 0010:bch2_check_extents_to_backpointers+0x7320/0x7360 fs/bcachefs/backpointers.c:1087 Code: fd 90 0f 0b e8 a1 42 88 fd 90 0f 0b e8 99 42 88 fd 90 0f 0b e8 91 42 88 fd 90 0f 0b e8 89 42 88 fd 90 0f 0b e8 81 42 88 fd 90 <0f> 0b e8 79 42 88 fd 90 0f 0b e8 71 42 88 fd 90 0f 0b e8 69 42 88 RSP: 0018:ffffc9000d436480 EFLAGS: 00010246 RAX: ffffffff841728ff RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc9000e89a000 RSI: 00000000000fffff RDI: 0000000000100000 RBP: ffffc9000d437428 R08: 0000000000000001 R09: ffffffff8416ce36 R10: 0000000000000004 R11: ffff8880002a4880 R12: ffffc9000d4370e0 R13: ffffc9000d4372f0 R14: ffff888055c2027a R15: 0000000000000100 FS: 00007f3b22d636c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a316d43038 CR3: 0000000041db4000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:226 bch2_run_recovery_passes+0x2ad/0xa90 fs/bcachefs/recovery_passes.c:291 bch2_fs_recovery+0x265a/0x3de0 fs/bcachefs/recovery.c:937 bch2_fs_start+0x37c/0x610 fs/bcachefs/super.c:1030 bch2_fs_get_tree+0xd8d/0x1740 fs/bcachefs/fs.c:2203 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3560 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088 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: 0033:0x7f3b21f8e4ca 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:00007f3b22d62e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f3b22d62ef0 RCX: 00007f3b21f8e4ca RDX: 00000000200058c0 RSI: 0000000020000140 RDI: 00007f3b22d62eb0 RBP: 00000000200058c0 R08: 00007f3b22d62ef0 R09: 0000000001000800 R10: 0000000001000800 R11: 0000000000000246 R12: 0000000020000140 R13: 00007f3b22d62eb0 R14: 000000000000591c R15: 0000000020000040 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:data_type_to_alloc_counter fs/bcachefs/backpointers.c:841 [inline] RIP: 0010:check_bucket_backpointer_mismatch fs/bcachefs/backpointers.c:892 [inline] RIP: 0010:bch2_check_extents_to_backpointers+0x7320/0x7360 fs/bcachefs/backpointers.c:1087 Code: fd 90 0f 0b e8 a1 42 88 fd 90 0f 0b e8 99 42 88 fd 90 0f 0b e8 91 42 88 fd 90 0f 0b e8 89 42 88 fd 90 0f 0b e8 81 42 88 fd 90 <0f> 0b e8 79 42 88 fd 90 0f 0b e8 71 42 88 fd 90 0f 0b e8 69 42 88 RSP: 0018:ffffc9000d436480 EFLAGS: 00010246 RAX: ffffffff841728ff RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc9000e89a000 RSI: 00000000000fffff RDI: 0000000000100000 RBP: ffffc9000d437428 R08: 0000000000000001 R09: ffffffff8416ce36 R10: 0000000000000004 R11: ffff8880002a4880 R12: ffffc9000d4370e0 R13: ffffc9000d4372f0 R14: ffff888055c2027a R15: 0000000000000100 FS: 00007f3b22d636c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a316d43038 CR3: 0000000041db4000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400