BTRFS error (device loop4): ignoredatacsums must be used with ro mount option
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 5124 Comm: syz.4.139 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:backup_super_roots fs/btrfs/disk-io.c:2007 [inline]
RIP: 0010:write_all_supers+0xefa/0x4650 fs/btrfs/disk-io.c:4154
Code: e8 03 48 89 04 24 42 80 3c 38 00 74 08 4c 89 e7 e8 1b 0b 61 fe 49 8b 1c 24 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 f8 0a 61 fe 48 8b 1b 48 89 d8 48 c1
RSP: 0018:ffffc9000341f400 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000007 RSI: 0000000000029df5 RDI: ffff888023c08cc0
RBP: ffffc9000341f7d0 R08: dffffc0000000000 R09: ffff88807ab94b2b
R10: 0000000000000003 R11: dffffc0000000001 R12: ffff88807b350040
R13: ffff88807ab94b7a R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f5a254436c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c43bbdd CR3: 0000000079d62000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_commit_transaction+0x1f9b/0x3800 fs/btrfs/transaction.c:2462
 btrfs_set_free_space_cache_v1_active+0x6d/0x220 fs/btrfs/free-space-cache.c:4001
 btrfs_remount_cleanup fs/btrfs/super.c:1914 [inline]
 btrfs_remount+0x750/0x1640 fs/btrfs/super.c:2117
 reconfigure_super+0x43a/0x870 fs/super.c:938
 do_remount fs/namespace.c:2668 [inline]
 path_mount+0xceb/0x10a0 fs/namespace.c:3334
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3540
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f5a275ccf19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f5a25443058 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5a27792fa0 RCX: 00007f5a275ccf19
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000000
RBP: 00007f5a27640cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000804020 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5a27792fa0 R15: 00007ffd45e53c68
 </TASK>
Modules linked in:
---[ end trace 1eccb053a265b822 ]---
RIP: 0010:backup_super_roots fs/btrfs/disk-io.c:2007 [inline]
RIP: 0010:write_all_supers+0xefa/0x4650 fs/btrfs/disk-io.c:4154
Code: e8 03 48 89 04 24 42 80 3c 38 00 74 08 4c 89 e7 e8 1b 0b 61 fe 49 8b 1c 24 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 f8 0a 61 fe 48 8b 1b 48 89 d8 48 c1
RSP: 0018:ffffc9000341f400 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000007 RSI: 0000000000029df5 RDI: ffff888023c08cc0
RBP: ffffc9000341f7d0 R08: dffffc0000000000 R09: ffff88807ab94b2b
R10: 0000000000000003 R11: dffffc0000000001 R12: ffff88807b350040
R13: ffff88807ab94b7a R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f5a254436c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555588488608 CR3: 0000000079d62000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e8 03 48 89 04       	call   0x4894808
   5:	24 42                	and    $0x42,%al
   7:	80 3c 38 00          	cmpb   $0x0,(%rax,%rdi,1)
   b:	74 08                	je     0x15
   d:	4c 89 e7             	mov    %r12,%rdi
  10:	e8 1b 0b 61 fe       	call   0xfe610b30
  15:	49 8b 1c 24          	mov    (%r12),%rbx
  19:	48 89 d8             	mov    %rbx,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 df             	mov    %rbx,%rdi
  33:	e8 f8 0a 61 fe       	call   0xfe610b30
  38:	48 8b 1b             	mov    (%rbx),%rbx
  3b:	48 89 d8             	mov    %rbx,%rax
  3e:	48                   	rex.W
  3f:	c1                   	.byte 0xc1