io_time[WRITE] 1 fragmentation 0 bp_start 8 data_type sb but dirty_sectors==0: delete?, fixing bcachefs (loop0): error validating btree node on loop0 at btree snapshots level 0/0 u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq ebb8d5a9e3463bdb written 16 min_key POS_MIN durability: 1 ptr: 0:32:0 gen 0 node offset 0/16: incorrect min_key: got 0:21474836480:0 should be POS_MIN bcachefs (loop0): flagging btree snapshots lost data error reading btree root btree=snapshots level=0: btree_node_read_error, fixing bcachefs (loop0): scan_for_btree_nodes... bcachefs (loop0): btree node scan found 3 nodes after overwrites done bcachefs (loop0): check_topology... bcachefs (loop0): btree root inodes unreadable, must recover from scan no nodes found for btree inodes, continuing bcachefs (loop0): btree root snapshots unreadable, must recover from scan no nodes found for btree snapshots, continuing done bcachefs (loop0): accounting_read... done bcachefs (loop0): alloc_read... done bcachefs (loop0): stripes_read... done bcachefs (loop0): snapshots_read... bcachefs (loop0): running explicit recovery pass reconstruct_snapshots (21), currently at snapshots_read (7) done bcachefs (loop0): check_allocations... 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 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 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 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 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 bucket 0:15 gen 0 has wrong data_type: got free, should be journal, fixing bucket 0:15 gen 0 data type journal has wrong dirty_sectors: got 0, should be 256, fixing bucket 0:26 gen 0 has wrong data_type: got free, should be btree, fixing bucket 0:26 gen 0 data type btree has wrong dirty_sectors: got 0, should be 256, fixing bucket 0:32 gen 0 has wrong data_type: got btree, should be need_discard, fixing bucket 0:32 gen 0 data type need_discard has wrong dirty_sectors: got 256, should be 0, fixing bucket 0:38 gen 0 has wrong data_type: got btree, should be need_discard, fixing bucket 0:38 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... ------------[ cut here ]------------ kernel BUG at fs/bcachefs/backpointers.c:841! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 Not tainted 6.14.0-rc1-syzkaller-00235-g9946eaf552b1 #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 75 87 fd 90 0f 0b e8 99 75 87 fd 90 0f 0b e8 91 75 87 fd 90 0f 0b e8 89 75 87 fd 90 0f 0b e8 81 75 87 fd 90 <0f> 0b e8 79 75 87 fd 90 0f 0b e8 71 75 87 fd 90 0f 0b e8 69 75 87 RSP: 0018:ffffc9000d27e480 EFLAGS: 00010287 RAX: ffffffff8437ea1f RBX: 0000000000000008 RCX: 0000000000100000 RDX: ffffc9000e3d2000 RSI: 00000000000dd1f2 RDI: 00000000000dd1f3 RBP: ffffc9000d27f428 R08: 0000000000000001 R09: ffffffff84378f56 R10: 0000000000000004 R11: ffff888000db0000 R12: ffffc9000d27f0e0 R13: ffffc9000d27f2f0 R14: ffff8880533e027a R15: 0000000000000100 FS: 00007fbaa7d916c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c49f4b40c8 CR3: 00000000408a6000 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:936 bch2_fs_start+0x37c/0x610 fs/bcachefs/super.c:1041 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: 0033:0x7fbaa6f8e58a 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:00007fbaa7d90e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fbaa7d90ef0 RCX: 00007fbaa6f8e58a RDX: 0000400000000180 RSI: 0000400000005900 RDI: 00007fbaa7d90eb0 RBP: 0000400000000180 R08: 00007fbaa7d90ef0 R09: 0000000001000000 R10: 0000000001000000 R11: 0000000000000246 R12: 0000400000005900 R13: 00007fbaa7d90eb0 R14: 00000000000059eb R15: 00004000000000c0 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 75 87 fd 90 0f 0b e8 99 75 87 fd 90 0f 0b e8 91 75 87 fd 90 0f 0b e8 89 75 87 fd 90 0f 0b e8 81 75 87 fd 90 <0f> 0b e8 79 75 87 fd 90 0f 0b e8 71 75 87 fd 90 0f 0b e8 69 75 87 RSP: 0018:ffffc9000d27e480 EFLAGS: 00010287 RAX: ffffffff8437ea1f RBX: 0000000000000008 RCX: 0000000000100000 RDX: ffffc9000e3d2000 RSI: 00000000000dd1f2 RDI: 00000000000dd1f3 RBP: ffffc9000d27f428 R08: 0000000000000001 R09: ffffffff84378f56 R10: 0000000000000004 R11: ffff888000db0000 R12: ffffc9000d27f0e0 R13: ffffc9000d27f2f0 R14: ffff8880533e027a R15: 0000000000000100 FS: 00007fbaa7d916c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c49f4b40c8 CR3: 00000000408a6000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400