btrfs: Deprecated parameter 'usebackuproot'
BTRFS warning: 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead
BTRFS warning (device loop7 state M): Skipping commit of aborted transaction.
------------[ cut here ]------------
BTRFS: Transaction aborted (error -28)
WARNING: fs/btrfs/transaction.c:2037 at cleanup_transaction fs/btrfs/transaction.c:2037 [inline], CPU#1: syz.7.13980/6902
WARNING: fs/btrfs/transaction.c:2037 at btrfs_commit_transaction.cold+0x3ee/0xb5e fs/btrfs/transaction.c:2630, CPU#1: syz.7.13980/6902
Modules linked in:
CPU: 1 UID: 0 PID: 6902 Comm: syz.7.13980 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
RIP: 0010:cleanup_transaction fs/btrfs/transaction.c:2037 [inline]
RIP: 0010:btrfs_commit_transaction.cold+0x3f1/0xb5e fs/btrfs/transaction.c:2630
Code: e9 d2 fd ff ff 48 8b 7c 24 18 e8 88 ef 40 01 e9 aa fd ff ff 31 db e9 1c ff ff ff e8 a7 99 d7 00 48 8d 3d 10 cf 90 0f 44 89 e6 <67> 48 0f b9 3a e9 fe fe ff ff e8 8e 99 d7 00 48 8b 04 24 48 05 b0
RSP: 0018:ffffc90002ee79c8 EFLAGS: 00010287
RAX: 0000000000021033 RBX: ffff888060c5db00 RCX: ffffc9000f714000
RDX: 0000000000080000 RSI: 00000000ffffffe4 RDI: ffffffff90c01490
RBP: 0000000000000001 R08: 0000000000000005 R09: fffffffffffffffb
R10: ffffffffffffffe4 R11: 0000000000000000 R12: 00000000ffffffe4
R13: ffff88807ac32000 R14: ffff888012bcc758 R15: ffff888012bcc6f0
FS:  00007fa82272a6c0(0000) GS:ffff8881246df000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564474a32668 CR3: 0000000049f2c000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 btrfs_set_free_space_cache_v1_active+0x177/0x1c0 fs/btrfs/free-space-cache.c:4156
 btrfs_remount_cleanup fs/btrfs/super.c:1295 [inline]
 btrfs_reconfigure+0xbf6/0x1ac0 fs/btrfs/super.c:1574
 reconfigure_super+0x52d/0xb30 fs/super.c:1077
 do_remount fs/namespace.c:3264 [inline]
 path_mount+0x19cf/0x23c0 fs/namespace.c:4014
 do_mount fs/namespace.c:4035 [inline]
 __do_sys_mount fs/namespace.c:4224 [inline]
 __se_sys_mount fs/namespace.c:4201 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:4201
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa82179bf4a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa822729e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fa822729ee0 RCX: 00007fa82179bf4a
RDX: 0000200000000180 RSI: 0000200000000100 RDI: 0000000000000000
RBP: 0000200000000180 R08: 00007fa822729ee0 R09: 00000000022520a2
R10: 00000000022520a2 R11: 0000000000000246 R12: 0000200000000100
R13: 00007fa822729ea0 R14: 0000000000000000 R15: 00002000000002c0
 </TASK>
----------------
Code disassembly (best guess):
   0:	e9 d2 fd ff ff       	jmp    0xfffffdd7
   5:	48 8b 7c 24 18       	mov    0x18(%rsp),%rdi
   a:	e8 88 ef 40 01       	call   0x140ef97
   f:	e9 aa fd ff ff       	jmp    0xfffffdbe
  14:	31 db                	xor    %ebx,%ebx
  16:	e9 1c ff ff ff       	jmp    0xffffff37
  1b:	e8 a7 99 d7 00       	call   0xd799c7
  20:	48 8d 3d 10 cf 90 0f 	lea    0xf90cf10(%rip),%rdi        # 0xf90cf37
  27:	44 89 e6             	mov    %r12d,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 fe fe ff ff       	jmp    0xffffff32
  34:	e8 8e 99 d7 00       	call   0xd799c7
  39:	48 8b 04 24          	mov    (%rsp),%rax
  3d:	48                   	rex.W
  3e:	05                   	.byte 0x5
  3f:	b0                   	.byte 0xb0