Kernel bug: kernel BUG in bch2_bkey_pack_pos_lossy
Subsystem: bcachefs
Status: fixed

Crash report:
invalid bkey u64s 18 type inode_v3 0:4100:U32_MAX len 0 ver 0: (unpack error)
  invalid variable length fields: delete?, 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...
------------[ cut here ]------------
kernel BUG at fs/bcachefs/bkey.c:130!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 5830 Comm: syz-executor451 Not tainted 6.12.0-rc6-syzkaller-00110-gff7afaeca1a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:pack_state_finish fs/bcachefs/bkey.c:130 [inline]
RIP: 0010:bch2_bkey_pack_pos_lossy+0x1956/0x1990 fs/bcachefs/bkey.c:525
Code: fd 90 0f 0b e8 3b b3 86 fd 90 0f 0b e8 33 b3 86 fd 90 0f 0b e8 2b b3 86 fd 90 0f 0b e8 23 b3 86 fd 90 0f 0b e8 1b b3 86 fd 90 <0f> 0b e8 c3 7f b0 07 e8 0e b3 86 fd 90 0f 0b e8 06 b3 86 fd 90 0f
RSP: 0018:ffffc90003605d20 EFLAGS: 00010293
RAX: ffffffff840e26e5 RBX: ffffc908036060b8 RCX: ffff88803050da00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003605f58 R08: ffffffff840e15e6 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888027ab28c0 R14: 0000000000000000 R15: ffffc900036060c0
FS:  000055555688e380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e3ed200380 CR3: 000000007cf72000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_btree_node_iter_init+0x894/0x4280 fs/bcachefs/bset.c:1313
 __btree_path_level_init fs/bcachefs/btree_iter.c:615 [inline]
 bch2_btree_path_level_init+0x4d2/0x9f0 fs/bcachefs/btree_iter.c:635
 btree_path_lock_root fs/bcachefs/btree_iter.c:769 [inline]
 bch2_btree_path_traverse_one+0x10de/0x2940 fs/bcachefs/btree_iter.c:1183
 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline]
 __bch2_btree_iter_peek fs/bcachefs/btree_iter.c:2210 [inline]
 bch2_btree_iter_peek_upto+0xb58/0x70e0 fs/bcachefs/btree_iter.c:2310
 bch2_btree_iter_peek_upto_type fs/bcachefs/btree_iter.h:685 [inline]
 bch2_gc_btree fs/bcachefs/btree_gc.c:670 [inline]
 bch2_gc_btrees fs/bcachefs/btree_gc.c:729 [inline]
 bch2_check_allocations+0x1abe/0x7070 fs/bcachefs/btree_gc.c:1133
 bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:185
 bch2_run_recovery_passes+0x387/0x870 fs/bcachefs/recovery_passes.c:232
 bch2_fs_recovery+0x25cc/0x39c0 fs/bcachefs/recovery.c:861
 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1036
 bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2170
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
 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: 0033:0x7ff9fb7b9c3a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd79acb698 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd79acb6b0 RCX: 00007ff9fb7b9c3a
RDX: 00000000200058c0 RSI: 0000000020005900 RDI: 00007ffd79acb6b0
RBP: 0000000000000004 R08: 00007ffd79acb6f0 R09: 0000000000005932
R10: 0000000000010000 R11: 0000000000000282 R12: 0000000000010000
R13: 00007ffd79acb6f0 R14: 0000000000000003 R15: 0000000001000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pack_state_finish fs/bcachefs/bkey.c:130 [inline]
RIP: 0010:bch2_bkey_pack_pos_lossy+0x1956/0x1990 fs/bcachefs/bkey.c:525
Code: fd 90 0f 0b e8 3b b3 86 fd 90 0f 0b e8 33 b3 86 fd 90 0f 0b e8 2b b3 86 fd 90 0f 0b e8 23 b3 86 fd 90 0f 0b e8 1b b3 86 fd 90 <0f> 0b e8 c3 7f b0 07 e8 0e b3 86 fd 90 0f 0b e8 06 b3 86 fd 90 0f
RSP: 0018:ffffc90003605d20 EFLAGS: 00010293
RAX: ffffffff840e26e5 RBX: ffffc908036060b8 RCX: ffff88803050da00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003605f58 R08: ffffffff840e15e6 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff888027ab28c0 R14: 0000000000000000 R15: ffffc900036060c0
FS:  000055555688e380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e3ed1f7e58 CR3: 000000007cf72000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400