btrfs: Deprecated parameter 'usebackuproot'
BTRFS warning: 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead
BTRFS warning (device loop8 state M): Skipping commit of aborted transaction.
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: CPU: 1 PID: 15373 at fs/btrfs/transaction.c:2023 cleanup_transaction fs/btrfs/transaction.c:2023 [inline]
WARNING: CPU: 1 PID: 15373 at fs/btrfs/transaction.c:2023 btrfs_commit_transaction+0x2f67/0x3950 fs/btrfs/transaction.c:2614
Modules linked in:
CPU: 1 UID: 0 PID: 15373 Comm: syz.8.1588 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:cleanup_transaction fs/btrfs/transaction.c:2023 [inline]
RIP: 0010:btrfs_commit_transaction+0x2f67/0x3950 fs/btrfs/transaction.c:2614
Code: 4f 46 e8 fd 84 c0 74 2b e8 a6 9d 01 fe eb 73 e8 9f 9d 01 fe 90 48 c7 c7 c0 5f 4d 8b 8b 5c 24 18 89 de e8 9c 6d c6 fd 89 d9 90 <0f> 0b 90 90 e9 1a 01 00 00 e8 4b b7 39 07 89 c3 31 ff 89 c6 e8 20
RSP: 0018:ffffc900056bf780 EFLAGS: 00010246
RAX: a991a997460e7300 RBX: 00000000ffffffe4 RCX: 00000000ffffffe4
RDX: ffffc9000ced9000 RSI: 00000000000019dd RDI: 00000000000019de
RBP: ffffc900056bfac0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017124863 R12: ffff88802a414e28
R13: ffff88804cff4000 R14: ffff88804cff4000 R15: 0000000000000000
FS:  00007f322849e6c0(0000) GS:ffff8881269c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb477421e9c CR3: 00000000533dc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 btrfs_set_free_space_cache_v1_active+0x71/0x430 fs/btrfs/free-space-cache.c:4152
 btrfs_remount_cleanup fs/btrfs/super.c:1289 [inline]
 btrfs_reconfigure+0x1bd4/0x2160 fs/btrfs/super.c:1568
 reconfigure_super+0x227/0x890 fs/super.c:1077
 do_remount fs/namespace.c:3324 [inline]
 path_mount+0xd18/0xfe0 fs/namespace.c:4115
 do_mount fs/namespace.c:4136 [inline]
 __do_sys_mount fs/namespace.c:4347 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4324
 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: 0033:0x7f322a24038a
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:00007f322849de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f322849def0 RCX: 00007f322a24038a
RDX: 0000200000000200 RSI: 0000200000000380 RDI: 0000000000000000
RBP: 0000200000000200 R08: 00007f322849def0 R09: 0000000000000060
R10: 0000000000000060 R11: 0000000000000246 R12: 0000200000000380
R13: 00007f322849deb0 R14: 0000000000000000 R15: 00002000000002c0
 </TASK>