missing backpointer for btree=subvolumes l=1 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 got: u64s 5 type deleted 0:9175040:0 len 0 ver 0 want: u64s 9 type backpointer 0:9175040:0 len 0 ver 0: bucket=0:35:0 btree=subvolumes l=1 offset=0:0 len=256 pos=SPOS_MAX, fixing missing backpointer for btree=snapshots l=1 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 got: u64s 5 type deleted 0:8388608:0 len 0 ver 0 want: u64s 9 type backpointer 0:8388608:0 len 0 ver 0: bucket=0:32:0 btree=snapshots l=1 offset=0:0 len=256 pos=SPOS_MAX, fixing ------------[ cut here ]------------ kernel BUG at fs/bcachefs/btree_iter.c:2916! Oops: invalid opcode: 0000 [#1] PREEMPT SMP PTI CPU: 0 UID: 0 PID: 3350 Comm: syz.2.15 Not tainted 6.12.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:bch2_trans_node_iter_init+0x16c/0x180 fs/bcachefs/btree_iter.c:2916 Code: 01 00 00 73 27 65 48 8b 04 25 28 00 00 00 48 3b 44 24 18 75 1a 48 83 c4 20 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc 90 0f 0b 90 <0f> 0b 90 0f 0b e8 7a fb 41 01 66 2e 0f 1f 84 00 00 00 00 00 90 90 RSP: 0018:ffffc9000364f3d8 EFLAGS: 00010293 RAX: 0000000000000003 RBX: ffffc9000364f7b8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888105f643e8 RDI: 0000000000000c19 RBP: ffffffffffffffff R08: 0000000000000000 R09: 0000000000000000 R10: ffff888105f663c8 R11: 000000000000024d R12: ffff888105f64000 R13: 0000000000001c00 R14: 0000000000000000 R15: 000000000000000b FS: 00007f98b2fa06c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f6a442f648 CR3: 0000000107f82000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bch2_backpointer_get_node+0x13f/0x2e0 fs/bcachefs/backpointers.c:358 bch2_backpointer_get_key+0x2c8/0x320 fs/bcachefs/backpointers.c:335 check_bp_exists fs/bcachefs/backpointers.c:579 [inline] check_extent_to_backpointers+0xb47/0x1220 fs/bcachefs/backpointers.c:683 check_btree_root_to_backpointers fs/bcachefs/backpointers.c:717 [inline] bch2_check_extents_to_backpointers_pass fs/bcachefs/backpointers.c:868 [inline] bch2_check_extents_to_backpointers+0x65f/0xbe0 fs/bcachefs/backpointers.c:932 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:185 [inline] bch2_run_recovery_passes+0x14f/0x240 fs/bcachefs/recovery_passes.c:232 bch2_fs_recovery+0x8a5/0x11e0 fs/bcachefs/recovery.c:861 bch2_fs_start+0x1b9/0x270 fs/bcachefs/super.c:1037 bch2_fs_get_tree+0x2b5/0x640 fs/bcachefs/fs.c:2080 vfs_get_tree+0x27/0xf0 fs/super.c:1800 do_new_mount+0x15a/0x3a0 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4055 [inline] __se_sys_mount+0x148/0x1b0 fs/namespace.c:4032 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xe0/0x220 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f98b217feba 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:00007f98b2f9fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f98b2f9fef0 RCX: 00007f98b217feba RDX: 0000000020000040 RSI: 0000000020005900 RDI: 00007f98b2f9feb0 RBP: 0000000020000040 R08: 00007f98b2f9fef0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020005900 R13: 00007f98b2f9feb0 R14: 00000000000058fe R15: 0000000020000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:bch2_trans_node_iter_init+0x16c/0x180 fs/bcachefs/btree_iter.c:2916 Code: 01 00 00 73 27 65 48 8b 04 25 28 00 00 00 48 3b 44 24 18 75 1a 48 83 c4 20 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc 90 0f 0b 90 <0f> 0b 90 0f 0b e8 7a fb 41 01 66 2e 0f 1f 84 00 00 00 00 00 90 90 RSP: 0018:ffffc9000364f3d8 EFLAGS: 00010293 RAX: 0000000000000003 RBX: ffffc9000364f7b8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888105f643e8 RDI: 0000000000000c19 RBP: ffffffffffffffff R08: 0000000000000000 R09: 0000000000000000 R10: ffff888105f663c8 R11: 000000000000024d R12: ffff888105f64000 R13: 0000000000001c00 R14: 0000000000000000 R15: 000000000000000b FS: 00007f98b2fa06c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f6a442f648 CR3: 0000000107f82000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400