bi_dir_offset=0
    bi_subvol=0
    bi_parent_subvol=0
    bi_nocow=0
    bi_depth=0
    bi_inodes_32bit=0
    bi_casefold=0
  invalid fields_start (got 4, min 6 max 13), deleting
------------[ cut here ]------------
kernel BUG at fs/bcachefs/bkey.c:389!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 8991 Comm: read_btree_node Not tainted 6.15.0-syzkaller-10769-g7d4e49a77d99 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:set_inc_field_lossy fs/bcachefs/bkey.c:389 [inline]
RIP: 0010:bch2_bkey_pack_pos_lossy+0x13de/0x24e0 fs/bcachefs/bkey.c:518
Code: e8 47 25 09 fe 48 ba 00 00 00 00 00 fc ff df e9 a5 f8 ff ff e8 b3 c6 a7 fd 90 0f 0b e8 ab c6 a7 fd 90 0f 0b e8 a3 c6 a7 fd 90 <0f> 0b e8 9b c6 a7 fd 90 0f 0b e8 93 c6 a7 fd 90 0f 0b f3 0f 1e fa
RSP: 0018:ffffc9000451eb40 EFLAGS: 00010293
RAX: ffffffff8418733d RBX: 0000800000000000 RCX: ffff888025650000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000800000000000
RBP: ffffc9000451ed78 R08: ffffffffffffffff R09: ffffffffffffffff
R10: ffffffffffffffff R11: ffffffffffffffff R12: ffff88807d6c60c4
R13: ffff8000ffffffff R14: 0000000000000000 R15: fffffffffffffffe
FS:  0000000000000000(0000) GS:ffff888125d95000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2a0e146000 CR3: 0000000033bd6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bkey_pack_pos fs/bcachefs/bkey.h:382 [inline]
 __build_ro_aux_tree+0xb21/0x1800 fs/bcachefs/bset.c:743
 bch2_bset_build_aux_tree+0x3f5/0x570 fs/bcachefs/bset.c:787
 bch2_btree_node_read_done+0x39e4/0x4f60 fs/bcachefs/btree_io.c:1322
 btree_node_read_work+0x426/0xe30 fs/bcachefs/btree_io.c:1400
 bch2_btree_node_read+0x887/0x29f0 fs/bcachefs/btree_io.c:-1
 bch2_btree_node_fill+0xd12/0x14f0 fs/bcachefs/btree_cache.c:994
 bch2_btree_node_get_noiter+0xa2c/0x1000 fs/bcachefs/btree_cache.c:1261
 found_btree_node_is_readable fs/bcachefs/btree_node_scan.c:85 [inline]
 try_read_btree_node fs/bcachefs/btree_node_scan.c:220 [inline]
 read_btree_nodes_worker+0x1319/0x1e20 fs/bcachefs/btree_node_scan.c:269
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:set_inc_field_lossy fs/bcachefs/bkey.c:389 [inline]
RIP: 0010:bch2_bkey_pack_pos_lossy+0x13de/0x24e0 fs/bcachefs/bkey.c:518
Code: e8 47 25 09 fe 48 ba 00 00 00 00 00 fc ff df e9 a5 f8 ff ff e8 b3 c6 a7 fd 90 0f 0b e8 ab c6 a7 fd 90 0f 0b e8 a3 c6 a7 fd 90 <0f> 0b e8 9b c6 a7 fd 90 0f 0b e8 93 c6 a7 fd 90 0f 0b f3 0f 1e fa
RSP: 0018:ffffc9000451eb40 EFLAGS: 00010293
RAX: ffffffff8418733d RBX: 0000800000000000 RCX: ffff888025650000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000800000000000
RBP: ffffc9000451ed78 R08: ffffffffffffffff R09: ffffffffffffffff
R10: ffffffffffffffff R11: ffffffffffffffff R12: ffff88807d6c60c4
R13: ffff8000ffffffff R14: 0000000000000000 R15: fffffffffffffffe
FS:  0000000000000000(0000) GS:ffff888125d95000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2a0e146000 CR3: 0000000033390000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400