workqueue: max_active 2097158 requested for btrfs-endio-write is out of range, clamping between 1 and 512
workqueue: max_active 2097158 requested for btrfs-compressed-write is out of range, clamping between 1 and 512
BTRFS info (device loop0: state MC): resize thread pool 2097158 -> 4
BTRFS info (device loop0: state MC): disabling free space tree
BTRFS info (device loop0: state MC): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1)
BTRFS info (device loop0: state MC): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
BUG: kernel NULL pointer dereference, address: 0000000000000018
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 8000000100fc0067 P4D 8000000100fc0067 PUD 107303067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 0 PID: 3295 Comm: syz.0.15 Not tainted 6.7.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:backup_super_roots fs/btrfs/disk-io.c:1676 [inline]
RIP: 0010:write_all_supers+0x225/0xea0 fs/btrfs/disk-io.c:4061
Code: 18 48 8b 5c 24 08 48 8b 11 48 8b 89 20 01 00 00 48 c1 e1 06 4c 01 e1 81 e2 ff 0f 00 00 0f b6 4c 0a 64 43 88 8c 2f 9a 00 00 00 <48> 8b 48 18 48 8b 09 4b 89 4c 2f 50 48 8b 48 18 48 8b 11 48 8b 89
RSP: 0018:ffffc900037f7990 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888106f24000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff837ffc5e RDI: 00000000ffffffff
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0005088000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881026a8b2b
FS:  00007f1aa53a36c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000018 CR3: 000000010aeba000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_commit_transaction+0xaa8/0x11f0 fs/btrfs/transaction.c:2567
 btrfs_delete_free_space_tree+0x15f/0x200 fs/btrfs/free-space-tree.c:1297
 btrfs_start_pre_rw_mount+0x330/0x4b0 fs/btrfs/disk-io.c:2997
 btrfs_remount_rw fs/btrfs/super.c:2225 [inline]
 btrfs_reconfigure+0x3b1/0xca0 fs/btrfs/super.c:2533
 btrfs_reconfigure_for_mount fs/btrfs/super.c:3017 [inline]
 btrfs_get_tree_subvol fs/btrfs/super.c:3076 [inline]
 btrfs_get_tree+0x29e/0x700 fs/btrfs/super.c:3112
 vfs_get_tree+0x2a/0xf0 fs/super.c:1771
 do_new_mount+0x15a/0x3a0 fs/namespace.c:3348
 do_mount fs/namespace.c:3688 [inline]
 __do_sys_mount fs/namespace.c:3897 [inline]
 __se_sys_mount+0x14b/0x1c0 fs/namespace.c:3874
 do_syscall_64+0x4d/0x120
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f1aa457def9
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:00007f1aa53a3038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f1aa4735f80 RCX: 00007f1aa457def9
RDX: 0000000020001240 RSI: 0000000020001200 RDI: 00000000200011c0
RBP: 00007f1aa45f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1aa4735f80 R15: 00007ffde0f654b8
 </TASK>
Modules linked in:
CR2: 0000000000000018
---[ end trace 0000000000000000 ]---
RIP: 0010:backup_super_roots fs/btrfs/disk-io.c:1676 [inline]
RIP: 0010:write_all_supers+0x225/0xea0 fs/btrfs/disk-io.c:4061
Code: 18 48 8b 5c 24 08 48 8b 11 48 8b 89 20 01 00 00 48 c1 e1 06 4c 01 e1 81 e2 ff 0f 00 00 0f b6 4c 0a 64 43 88 8c 2f 9a 00 00 00 <48> 8b 48 18 48 8b 09 4b 89 4c 2f 50 48 8b 48 18 48 8b 11 48 8b 89
RSP: 0018:ffffc900037f7990 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888106f24000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff837ffc5e RDI: 00000000ffffffff
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0005088000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881026a8b2b
FS:  00007f1aa53a36c0(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000018 CR3: 000000010aeba000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	18 48 8b             	sbb    %cl,-0x75(%rax)
   3:	5c                   	pop    %rsp
   4:	24 08                	and    $0x8,%al
   6:	48 8b 11             	mov    (%rcx),%rdx
   9:	48 8b 89 20 01 00 00 	mov    0x120(%rcx),%rcx
  10:	48 c1 e1 06          	shl    $0x6,%rcx
  14:	4c 01 e1             	add    %r12,%rcx
  17:	81 e2 ff 0f 00 00    	and    $0xfff,%edx
  1d:	0f b6 4c 0a 64       	movzbl 0x64(%rdx,%rcx,1),%ecx
  22:	43 88 8c 2f 9a 00 00 	mov    %cl,0x9a(%r15,%r13,1)
  29:	00
* 2a:	48 8b 48 18          	mov    0x18(%rax),%rcx <-- trapping instruction
  2e:	48 8b 09             	mov    (%rcx),%rcx
  31:	4b 89 4c 2f 50       	mov    %rcx,0x50(%r15,%r13,1)
  36:	48 8b 48 18          	mov    0x18(%rax),%rcx
  3a:	48 8b 11             	mov    (%rcx),%rdx
  3d:	48                   	rex.W
  3e:	8b                   	.byte 0x8b
  3f:	89                   	.byte 0x89