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 1.20: directory_size 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 bcachefs (loop0): error validating btree node on loop0 at btree lru level 0/0 u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 28f61e078e70b95c written 16 min_key POS_MIN durability: 1 ptr: 0:28:0 gen 0 node offset 0/16: incorrect min_key: got 0:0:150994944 should be POS_MIN bcachefs (loop0): running explicit recovery pass check_topology (2), currently at recovery_pass_empty (0) bcachefs (loop0): flagging btree lru lost data error reading btree root btree=lru level=0: btree_node_read_error, fixing bcachefs (loop0): check_topology... 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 0:8 gen 0 has wrong data_type: got free, should be sb, fixing bucket 0:8 gen 0 data type sb has wrong dirty_sectors: got 0, should be 8, fixing bucket 0:28 gen 0 has wrong data_type: got btree, should be need_discard, fixing bucket 0:28 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_alloc_info... bucket incorrectly unset in need_discard btree u64s 13 type alloc_v4 0:28:0 len 0 ver 0: gen 0 oldest_gen 0 data_type need_discard journal_seq_nonempty 6 journal_seq_empty 0 need_discard 1 need_inc_gen 1 dirty_sectors 0 stripe_sectors 0 cached_sectors 0 stripe 0 stripe_redundancy 0 io_time[READ] 1 io_time[WRITE] 768 fragmentation 0 bp_start 8 , fixing 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: 5317 Comm: syz.0.0 Not tainted 6.14.0-rc6-syzkaller-00003-g4d872d51bc9d #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+0x7368/0x73b0 fs/bcachefs/backpointers.c:1087 Code: fd 90 0f 0b e8 69 87 7e fd 90 0f 0b e8 61 87 7e fd 90 0f 0b e8 59 87 7e fd 90 0f 0b e8 51 87 7e fd 90 0f 0b e8 49 87 7e fd 90 <0f> 0b e8 41 87 7e fd 90 0f 0b e8 39 87 7e fd 90 0f 0b e8 31 87 7e RSP: 0018:ffffc9000d46e480 EFLAGS: 00010287 RAX: ffffffff844357c7 RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc9000e472000 RSI: 00000000000fd854 RDI: 00000000000fd855 RBP: ffffc9000d46f428 R08: 0000000000000001 R09: ffffffff8442fcc8 R10: 0000000000000004 R11: ffff88801f8ea440 R12: ffffc9000d46f0e0 R13: ffffc9000d46f2f0 R14: ffff8880562801d2 R15: 0000000000000008 FS: 00007f3eccf006c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000556580e92000 CR3: 000000005313e000 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+0xdb7/0x17a0 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: 0033:0x7f3ecc18e90a 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:00007f3ecceffe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f3ecceffef0 RCX: 00007f3ecc18e90a RDX: 0000400000000040 RSI: 00004000000000c0 RDI: 00007f3ecceffeb0 RBP: 0000400000000040 R08: 00007f3ecceffef0 R09: 0000000000004004 R10: 0000000000004004 R11: 0000000000000246 R12: 00004000000000c0 R13: 00007f3ecceffeb0 R14: 00000000000058f3 R15: 0000400000000200 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+0x7368/0x73b0 fs/bcachefs/backpointers.c:1087 Code: fd 90 0f 0b e8 69 87 7e fd 90 0f 0b e8 61 87 7e fd 90 0f 0b e8 59 87 7e fd 90 0f 0b e8 51 87 7e fd 90 0f 0b e8 49 87 7e fd 90 <0f> 0b e8 41 87 7e fd 90 0f 0b e8 39 87 7e fd 90 0f 0b e8 31 87 7e RSP: 0018:ffffc9000d46e480 EFLAGS: 00010287 RAX: ffffffff844357c7 RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc9000e472000 RSI: 00000000000fd854 RDI: 00000000000fd855 RBP: ffffc9000d46f428 R08: 0000000000000001 R09: ffffffff8442fcc8 R10: 0000000000000004 R11: ffff88801f8ea440 R12: ffffc9000d46f0e0 R13: ffffc9000d46f2f0 R14: ffff8880562801d2 R15: 0000000000000008 FS: 00007f3eccf006c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a577d080f8 CR3: 000000005313e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400