bucket incorrectly set in freespace btree u64s 13 type alloc_v4 0:42:0 len 0 ver 0: gen 0 oldest_gen 0 data_type btree journal_seq_nonempty 0 journal_seq_empty 0 need_discard 0 need_inc_gen 0 dirty_sectors 512 stripe_sectors 0 cached_sectors 0 stripe 0 stripe_redundancy 0 io_time[READ] 0 io_time[WRITE] 0 fragmentation 0 bp_start 8 , fixing bucket incorrectly set in freespace btree u64s 13 type alloc_v4 0:42:0 len 0 ver 0: gen 0 oldest_gen 0 data_type btree journal_seq_nonempty 0 journal_seq_empty 0 need_discard 0 need_inc_gen 0 dirty_sectors 512 stripe_sectors 0 cached_sectors 0 stripe 0 stripe_redundancy 0 io_time[READ] 0 io_time[WRITE] 0 fragmentation 0 bp_start 8 , fixing entry in freespace btree for nonexistant dev:bucket 4244635648:33, fixing done bcachefs (loop0): check_lrus... lru key points to nonexistent device:bucket 65024:34, fixing done bcachefs (loop0): check_btree_backpointers... backpointer for nonexistent alloc key: 0:27:0 u64s 9 type backpointer 0:7077888:0 len 0 ver 0: bucket=0:27:0 btree=extents level=1 suboffset=0 len=256 gen=0 pos=SPOS_MAX, fixing backpointer for nonexistent alloc key: 0:34:0 u64s 9 type backpointer 0:8912896:0 len 0 ver 0: bucket=0:34:0 btree=extents level=0 suboffset=0 len=8 gen=0 pos=4099:8:U32_MAX, fixing backpointer for nonexistent alloc key: 0:34:0 u64s 9 type backpointer 0:8921088:0 len 0 ver 0: bucket=0:34:8 btree=extents level=0 suboffset=0 len=8 gen=0 pos=536870913:24:U32_MAX, fixing 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: 5322 Comm: syz.0.0 Not tainted 6.14.0-rc2-syzkaller-00185-g128c8f96eb86 #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 c9 c9 7e fd 90 0f 0b e8 c1 c9 7e fd 90 0f 0b e8 b9 c9 7e fd 90 0f 0b e8 b1 c9 7e fd 90 0f 0b e8 a9 c9 7e fd 90 <0f> 0b e8 a1 c9 7e fd 90 0f 0b e8 99 c9 7e fd 90 0f 0b e8 91 c9 7e RSP: 0018:ffffc9000d35e480 EFLAGS: 00010246 RAX: ffffffff8442edb7 RBX: 0000000000000001 RCX: 0000000000100000 RDX: ffffc9000e7b2000 RSI: 00000000000fffff RDI: 0000000000100000 RBP: ffffc9000d35f428 R08: 0000000000000001 R09: ffffffff844292b8 R10: 0000000000000004 R11: ffff888000198000 R12: ffffc9000d35f0e0 R13: ffffc9000d35f2f0 R14: ffff8880564e00f2 R15: 0000000000000100 FS: 00007f98a6df56c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559976244028 CR3: 00000000442dc000 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: 0033:0x7f98aa98e58a 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:00007f98a6df4e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f98a6df4ef0 RCX: 00007f98aa98e58a RDX: 00004000000000c0 RSI: 0000400000000040 RDI: 00007f98a6df4eb0 RBP: 00004000000000c0 R08: 00007f98a6df4ef0 R09: 0000000000800000 R10: 0000000000800000 R11: 0000000000000246 R12: 0000400000000040 R13: 00007f98a6df4eb0 R14: 00000000000059d1 R15: 0000400000000100 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 c9 c9 7e fd 90 0f 0b e8 c1 c9 7e fd 90 0f 0b e8 b9 c9 7e fd 90 0f 0b e8 b1 c9 7e fd 90 0f 0b e8 a9 c9 7e fd 90 <0f> 0b e8 a1 c9 7e fd 90 0f 0b e8 99 c9 7e fd 90 0f 0b e8 91 c9 7e RSP: 0018:ffffc9000d35e480 EFLAGS: 00010246 RAX: ffffffff8442edb7 RBX: 0000000000000001 RCX: 0000000000100000 RDX: ffffc9000e7b2000 RSI: 00000000000fffff RDI: 0000000000100000 RBP: ffffc9000d35f428 R08: 0000000000000001 R09: ffffffff844292b8 R10: 0000000000000004 R11: ffff888000198000 R12: ffffc9000d35f0e0 R13: ffffc9000d35f2f0 R14: ffff8880564e00f2 R15: 0000000000000100 FS: 00007f98a6df56c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559976244028 CR3: 00000000442dc000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400