bcachefs (loop2): bch2_write_super(): fatal error  loop2: Superblock modified by another process (seq 43 expected 42)
bcachefs (loop2): scanning for old btree nodes: min_version 0.24: unwritten_extents
bcachefs (loop2): going read-write
bcachefs (loop2): bch2_write_super(): fatal error  loop2: Superblock modified by another process (seq 43 expected 42)
bcachefs (loop2): error in recovery: erofs_sb_err
bcachefs (loop2): bch2_fs_start(): error starting filesystem erofs_sb_err
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3325 at fs/bcachefs/super.c:1373 bch2_dev_free+0x149/0x160 fs/bcachefs/super.c:1373
Modules linked in:
CPU: 1 UID: 0 PID: 3325 Comm: syz.2.16 Not tainted 6.16.0-rc6-syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:bch2_dev_free+0x149/0x160 fs/bcachefs/super.c:1373
Code: 01 00 4c 89 e7 e8 27 1e 01 00 4c 89 ff e8 4f d8 f5 ff 4c 89 f7 e8 47 d8 f5 ff 48 89 df 5b 41 5c 41 5e 41 5f e9 08 9c 06 01 90 <0f> 0b 90 e9 e7 fe ff ff 90 0f 0b 90 e9 02 ff ff ff 66 0f 1f 44 00
RSP: 0018:ffffc9000366bbf8 EFLAGS: 00010202
RAX: 0000000000000009 RBX: ffff88810baaf000 RCX: ffff888179f2d3c0
RDX: 0000000000000000 RSI: ffffffff84a96af0 RDI: ffff88810baaf000
RBP: ffff8881023a6c60 R08: 0000000000080000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffff720
R13: ffffc9000366bd00 R14: ffff88810baaf0b0 R15: 0000000000000000
FS:  00007faaf13686c0(0000) GS:ffff8882b329a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faaf0571d60 CR3: 0000000109f56000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 bch2_fs_free+0x9a/0x140 fs/bcachefs/super.c:749
 bch2_fs_get_tree+0x2cd/0x740 fs/bcachefs/fs.c:2572
 vfs_get_tree+0x26/0xf0 fs/super.c:1804
 do_new_mount+0x13f/0x390 fs/namespace.c:3902
 do_mount fs/namespace.c:4239 [inline]
 __do_sys_mount fs/namespace.c:4450 [inline]
 __se_sys_mount+0x147/0x1b0 fs/namespace.c:4427
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0x2f0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faaf05900ca
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:00007faaf1367e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007faaf1367ef0 RCX: 00007faaf05900ca
RDX: 0000200000000080 RSI: 0000200000000000 RDI: 00007faaf1367eb0
RBP: 0000200000000080 R08: 00007faaf1367ef0 R09: 0000000001010051
R10: 0000000001010051 R11: 0000000000000246 R12: 0000200000000000
R13: 00007faaf1367eb0 R14: 000000000000f637 R15: 0000200000000200
 </TASK>