bcachefs (loop3): bch2_write_super(): fatal error  loop3: Superblock modified by another process (seq 43 expected 42)
bcachefs (loop3): error in recovery: erofs_sb_err
bcachefs (loop3): bch2_fs_start(): error starting filesystem erofs_sb_err
------------[ cut here ]------------
WARNING: fs/bcachefs/super.c:1373 at bch2_dev_free+0x3db/0x480 fs/bcachefs/super.c:1373, CPU#1: syz.3.254/7136
Modules linked in:
CPU: 1 UID: 0 PID: 7136 Comm: syz.3.254 Not tainted 6.16.0-rc6-next-20250716-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:bch2_dev_free+0x3db/0x480 fs/bcachefs/super.c:1373
Code: f7 e8 e9 13 e2 ff 4c 89 ef e8 e1 13 e2 ff 4c 89 ff 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 7b dd 14 07 e8 96 e7 65 fd 90 <0f> 0b 90 e9 2c fd ff ff e8 88 e7 65 fd 90 0f 0b 90 e9 fe fd ff ff
RSP: 0018:ffffc90003b3f8c8 EFLAGS: 00010246
RAX: ffffffff8459bf3a RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9000c5fd000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 0000000000000000 R08: ffff8880337bd507 R09: 1ffff110066f7aa0
R10: dffffc0000000000 R11: ffffed10066f7aa1 R12: ffff88806cf80128
R13: 0000000000000001 R14: 1ffff1100d9f0024 R15: 1ffff1100d9f0025
FS:  00007f707afd66c0(0000) GS:ffff888125ce2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555e943608 CR3: 000000002e4f2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 bch2_fs_free+0x440/0x550 fs/bcachefs/super.c:749
 bch2_fs_get_tree+0xb76/0x1540 fs/bcachefs/fs.c:2572
 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: 0033:0x7f707a1900ca
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:00007f707afd5e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f707afd5ef0 RCX: 00007f707a1900ca
RDX: 0000200000000080 RSI: 0000200000000000 RDI: 00007f707afd5eb0
RBP: 0000200000000080 R08: 00007f707afd5ef0 R09: 0000000001010051
R10: 0000000001010051 R11: 0000000000000246 R12: 0000200000000000
R13: 00007f707afd5eb0 R14: 000000000000f637 R15: 0000200000000200
 </TASK>