bcachefs (loop1): bucket 0:35 data type btree ptr gen 0 missing in alloc btree
  while marking 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, fixing
 done
bcachefs (loop1): going read-write
bcachefs (loop1): journal_replay...
------------[ cut here ]------------
kernel BUG at fs/bcachefs/btree_update.c:339!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 9432 Comm: syz.1.1197 Not tainted 6.16.0-rc4-next-20250704-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__btree_trans_update_by_path+0x1fd3/0x2010 fs/bcachefs/btree_update.c:339
Code: f6 ff ff 48 8b 7c 24 28 e8 ca e8 f5 fd 48 ba 00 00 00 00 00 fc ff df e9 3d f6 ff ff e8 36 4b 91 fd 90 0f 0b e8 2e 4b 91 fd 90 <0f> 0b e8 26 4b 91 fd 90 0f 0b e8 1e 4b 91 fd 90 0f 0b e8 16 4b 91
RSP: 0018:ffffc9000419e978 EFLAGS: 00010246
RAX: ffffffff842e6552 RBX: 0000000000008540 RCX: 0000000000080000
RDX: ffffc90004f03000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffff8880579e0010 R08: ffffffff8451ec0a R09: 0000000000000002
R10: 0000000000000003 R11: 0000000000000002 R12: ffff88804b680000
R13: ffff8880579e0000 R14: 0000000000000088 R15: 1ffff1100af3c002
FS:  00007f6fd7df66c0(0000) GS:ffff888125ce7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d3db7f2d8 CR3: 000000003410e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 bch2_trans_update_by_path fs/bcachefs/btree_update.c:454 [inline]
 bch2_trans_update_ip+0x8f6/0x1f00 fs/bcachefs/btree_update.c:546
 bch2_trans_update fs/bcachefs/btree_update.h:123 [inline]
 bch2_journal_replay_key+0x4c1/0xb50 fs/bcachefs/recovery.c:311
 bch2_journal_replay+0x171d/0x2630 fs/bcachefs/recovery.c:396
 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:484 [inline]
 __bch2_run_recovery_passes+0x395/0x1010 fs/bcachefs/recovery_passes.c:539
 bch2_run_recovery_passes+0x184/0x210 fs/bcachefs/recovery_passes.c:610
 bch2_fs_recovery+0x2690/0x3a50 fs/bcachefs/recovery.c:1005
 bch2_fs_start+0xaaf/0xda0 fs/bcachefs/super.c:1213
 bch2_fs_get_tree+0xb39/0x1540 fs/bcachefs/fs.c:2494
 vfs_get_tree+0x8f/0x2b0 fs/super.c:1804
 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805
 do_mount fs/namespace.c:4133 [inline]
 __do_sys_mount fs/namespace.c:4344 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4321
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6fd9f900ca
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:00007f6fd7df5e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6fd7df5ef0 RCX: 00007f6fd9f900ca
RDX: 0000200000000480 RSI: 0000200000005900 RDI: 00007f6fd7df5eb0
RBP: 0000200000000480 R08: 00007f6fd7df5ef0 R09: 0000000000000002
R10: 0000000000000002 R11: 0000000000000246 R12: 0000200000005900
R13: 00007f6fd7df5eb0 R14: 0000000000005a5f R15: 0000200000000100
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__btree_trans_update_by_path+0x1fd3/0x2010 fs/bcachefs/btree_update.c:339
Code: f6 ff ff 48 8b 7c 24 28 e8 ca e8 f5 fd 48 ba 00 00 00 00 00 fc ff df e9 3d f6 ff ff e8 36 4b 91 fd 90 0f 0b e8 2e 4b 91 fd 90 <0f> 0b e8 26 4b 91 fd 90 0f 0b e8 1e 4b 91 fd 90 0f 0b e8 16 4b 91
RSP: 0018:ffffc9000419e978 EFLAGS: 00010246
RAX: ffffffff842e6552 RBX: 0000000000008540 RCX: 0000000000080000
RDX: ffffc90004f03000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffff8880579e0010 R08: ffffffff8451ec0a R09: 0000000000000002
R10: 0000000000000003 R11: 0000000000000002 R12: ffff88804b680000
R13: ffff8880579e0000 R14: 0000000000000088 R15: 1ffff1100af3c002
FS:  00007f6fd7df66c0(0000) GS:ffff888125ce7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d3db7f2d8 CR3: 000000003410e000 CR4: 00000000003526f0