EXT4-fs error (device loop0): ext4_read_block_bitmap_nowait:482: comm syz-executor.0: Invalid block bitmap block 0 in block_group 0
EXT4-fs (loop0): Remounting filesystem read-only
BUG: unable to handle page fault for address: ffff888013080000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0003) - permissions violation
PGD 12c01067 P4D 12c01067 PUD 12c02067 PMD 13a9e063 PTE 8000000013080121
Oops: 0003 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5577 Comm: syz-executor.0 Not tainted 6.6.0-syzkaller-15494-g6bc986ab839c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:memmove+0x57/0x1b0 arch/x86/lib/memmove_64.S:74
Code: fa a8 02 00 00 72 05 40 38 fe 74 47 48 83 ea 20 48 83 ea 20 4c 8b 1e 4c 8b 56 08 4c 8b 4e 10 4c 8b 46 18 48 8d 76 20 4c 89 1f <4c> 89 57 08 4c 89 4f 10 4c 89 47 18 48 8d 7f 20 73 d4 48 83 c2 20
RSP: 0018:ffffc90004f1f800 EFLAGS: 00010282
RAX: ffff888012c4b078 RBX: ffff888012c4b002 RCX: ffffffff82312624
RDX: ffffffffffbcafc8 RSI: ffff888013080024 RDI: ffff88801307fff8
RBP: 0000000000000001 R08: cccccccccccccccc R09: cccccccccccccccc
R10: cccccccccccccccc R11: cccccccccccccccc R12: ffff888012c4b07c
R13: ffff888027e84000 R14: dffffc0000000000 R15: dffffc0000000000
FS:  00007f8f05e876c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888013080000 CR3: 000000001d445000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
----------------
Code disassembly (best guess):
   0:	fa                   	cli
   1:	a8 02                	test   $0x2,%al
   3:	00 00                	add    %al,(%rax)
   5:	72 05                	jb     0xc
   7:	40 38 fe             	cmp    %dil,%sil
   a:	74 47                	je     0x53
   c:	48 83 ea 20          	sub    $0x20,%rdx
  10:	48 83 ea 20          	sub    $0x20,%rdx
  14:	4c 8b 1e             	mov    (%rsi),%r11
  17:	4c 8b 56 08          	mov    0x8(%rsi),%r10
  1b:	4c 8b 4e 10          	mov    0x10(%rsi),%r9
  1f:	4c 8b 46 18          	mov    0x18(%rsi),%r8
  23:	48 8d 76 20          	lea    0x20(%rsi),%rsi
  27:	4c 89 1f             	mov    %r11,(%rdi)
* 2a:	4c 89 57 08          	mov    %r10,0x8(%rdi) <-- trapping instruction
  2e:	4c 89 4f 10          	mov    %r9,0x10(%rdi)
  32:	4c 89 47 18          	mov    %r8,0x18(%rdi)
  36:	48 8d 7f 20          	lea    0x20(%rdi),%rdi
  3a:	73 d4                	jae    0x10
  3c:	48 83 c2 20          	add    $0x20,%rdx