loop0: detected capacity change from 0 to 32768
bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,compression=lz4,metadata_target=/dev/loop0,noinodes_use_key_cache,nojournal_transaction_names
  allowing incompatible features above 0.0: (unknown version)
  features: lz4,new_siphash,inline_data,new_extent_overwrite,btree_ptr_v2,new_varint,journal_no_flush,alloc_v2,extents_across_btree_nodes
bcachefs (loop0): Using encoding defined by superblock: utf8-12.1.0
bcachefs (loop0): recovering from clean shutdown, journal seq 13
bcachefs (loop0): Version upgrade required:
Version upgrade from 0.32: (unknown version) to 1.7: mi_btree_bitmap incomplete
Doing incompatible version upgrade from 0.32: (unknown version) to 1.28: inode_has_case_insensitive
  running recovery passes: check_allocations,check_extents_to_backpointers,check_snapshots,check_subvols,check_inodes,check_dirents,set_fs_needs_rebalance
bcachefs (loop0): accounting_read... done
bcachefs (loop0): alloc_read... done
bcachefs (loop0): snapshots_read... done
bcachefs (loop0): check_allocations... done
bcachefs (loop0): going read-write
bcachefs (loop0): journal_replay... done
bcachefs (loop0): check_extents_to_backpointers...
bcachefs (loop0): scanning for missing backpointers in 6/128 buckets
 done
bcachefs (loop0): check_snapshots...
bcachefs (loop0): snapshot points to missing/incorrect tree:
  u64s 8 type snapshot 0:4294967295:0 len 0 ver 0: subvol parent          0 children          0          0 subvol 1 tree 0, fixing
 done
bcachefs (loop0): check_subvols... done
bcachefs (loop0): check_inodes... done
bcachefs (loop0): check_dirents... done
bcachefs (loop0): resume_logged_ops... done
bcachefs (loop0): delete_dead_inodes... done
bcachefs (loop0): set_fs_needs_rebalance... done
bcachefs (loop0): Fixed errors, running fsck a second time to verify fs is clean
bcachefs (loop0): check_extents_to_backpointers... done
bcachefs (loop0): check_snapshots... done
bcachefs (loop0): check_subvols... done
bcachefs (loop0): check_inodes... done
bcachefs (loop0): check_dirents... done
bcachefs (loop0): resume_logged_ops... done
bcachefs (loop0): delete_dead_inodes... done
bcachefs (loop0): set_fs_needs_rebalance... done
bcachefs (loop0): done starting filesystem
bcachefs (loop0): shutting down
bcachefs (loop0): going read-only
bcachefs (loop0): finished waiting for writes to stop
bcachefs (loop0): flushing journal and stopping allocators, journal seq 24
bcachefs (loop0): flushing journal and stopping allocators complete, journal seq 24
------------[ cut here ]------------
journal shutdown error: cur seq 24 but last empty seq 23
WARNING: CPU: 0 PID: 5357 at fs/bcachefs/journal.c:1472 bch2_fs_journal_stop+0x42b/0x440 fs/bcachefs/journal.c:1468
Modules linked in:
CPU: 0 UID: 0 PID: 5357 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:bch2_fs_journal_stop+0x42b/0x440 fs/bcachefs/journal.c:1468
Code: 44 24 30 42 80 3c 28 00 48 8b 5c 24 20 74 08 48 89 df e8 b8 41 d9 fd 48 8b 13 48 c7 c7 60 95 f5 8b 4c 89 e6 e8 c6 dd 37 fd 90 <0f> 0b 90 90 e9 e4 fe ff ff e8 47 ca 30 07 0f 1f 80 00 00 00 00 90
RSP: 0018:ffffc9000f497540 EFLAGS: 00010246
RAX: f80041490cc78500 RBX: ffff8880533caa28 RCX: ffff8880006c8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc9000f497660 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1c3a22c R12: 0000000000000018
R13: dffffc0000000000 R14: ffff8880533c9800 R15: 1ffff1100a679300
FS:  0000000000000000(0000) GS:ffff88808d00a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000044000 CR3: 00000000517e4000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __bch2_fs_read_only+0x343/0x5b0 fs/bcachefs/super.c:306
 bch2_fs_read_only+0x42a/0xb00 fs/bcachefs/super.c:366
 __bch2_fs_stop+0x100/0x900 fs/bcachefs/super.c:677
 generic_shutdown_super+0x132/0x2c0 fs/super.c:643
 bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2618
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1375
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6b5/0x2300 kernel/exit.c:961
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
 get_signal+0x1286/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff1f458eba9
Code: Unable to access opcode bytes at 0x7ff1f458eb7f.
RSP: 002b:00007ff1f541e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: 0000000000010b80 RBX: 00007ff1f47d5fa0 RCX: 00007ff1f458eba9
RDX: 0000000000000001 RSI: 0000200000000240 RDI: 000000000000000a
RBP: 00007ff1f4611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff1f47d6038 R14: 00007ff1f47d5fa0 R15: 00007ffd345f3988
 </TASK>