BUG: unable to handle page fault for address: ffff888001000000
#PF: supervisor write access in kernel mode
#PF: error_code(0x0003) - permissions violation
PGD 11201067 P4D 11201067 PUD 11202067 PMD 80000000010001e1 
Oops: 0003 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3915 Comm: syz-executor.1 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga16fb_fillrect+0x17b0/0x1c10 drivers/video/fbdev/vga16fb.c:923
Code: 00 00 31 ed 31 ff 89 de e8 3d 6f 27 fd 4c 63 64 24 08 44 8d 7b ff ff 4c 24 04 85 db 74 33 44 89 fb 66 0f 1f 84 00 00 00 00 00 <41> 88 2e 85 db 74 0c 49 ff c6 e8 01 6b 27 fd ff cb eb ed e8 f8 6a
RSP: 0018:ffffc9000498f288 EFLAGS: 00010202
RAX: ffffffff845cda0b RBX: 0000000000000007 RCX: 0000000000040000
RDX: ffffc9000e8f4000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 0000000000000000 R08: ffffffff845cd9b3 R09: ffffffff845ccab8
R10: 0000000000000002 R11: ffff88801be2d700 R12: 0000000000000000
R13: 0000000000000008 R14: ffff888001000000 R15: 0000000000000007
FS:  00007f5d37b95700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000000 CR3: 0000000091357000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 bit_clear+0x3f9/0x640 drivers/video/fbdev/core/bitblit.c:74
 fbcon_scroll+0x4cd/0x4130 drivers/video/fbdev/core/fbcon.c:1784
 con_scroll+0x517/0x7b0 drivers/tty/vt/vt.c:630
 lf drivers/tty/vt/vt.c:1507 [inline]
 vc_con_write_normal drivers/tty/vt/vt.c:2851 [inline]
 do_con_write+0x171a/0xe3b0 drivers/tty/vt/vt.c:2955
 con_write+0x20/0x40 drivers/tty/vt/vt.c:3295
 process_output_block drivers/tty/n_tty.c:592 [inline]
 n_tty_write+0xdda/0x1320 drivers/tty/n_tty.c:2288
 do_tty_write drivers/tty/tty_io.c:1038 [inline]
 file_tty_write+0x5c5/0x9a0 drivers/tty/tty_io.c:1110
 call_write_iter include/linux/fs.h:2161 [inline]
 new_sync_write fs/read_write.c:503 [inline]
 vfs_write+0xb11/0xe90 fs/read_write.c:590
 ksys_write+0x18f/0x2c0 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f5d3a61fae9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5d37b95188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5d3a732f60 RCX: 00007f5d3a61fae9
RDX: 00000000000001b7 RSI: 0000000020001040 RDI: 0000000000000005
RBP: 00007f5d3a679f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc9d7e26af R14: 00007f5d37b95300 R15: 0000000000022000
 </TASK>
Modules linked in:
CR2: ffff888001000000
---[ end trace 9e6e85729c83f6ec ]---
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga16fb_fillrect+0x17b0/0x1c10 drivers/video/fbdev/vga16fb.c:923
Code: 00 00 31 ed 31 ff 89 de e8 3d 6f 27 fd 4c 63 64 24 08 44 8d 7b ff ff 4c 24 04 85 db 74 33 44 89 fb 66 0f 1f 84 00 00 00 00 00 <41> 88 2e 85 db 74 0c 49 ff c6 e8 01 6b 27 fd ff cb eb ed e8 f8 6a
RSP: 0018:ffffc9000498f288 EFLAGS: 00010202
RAX: ffffffff845cda0b RBX: 0000000000000007 RCX: 0000000000040000
RDX: ffffc9000e8f4000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 0000000000000000 R08: ffffffff845cd9b3 R09: ffffffff845ccab8
R10: 0000000000000002 R11: ffff88801be2d700 R12: 0000000000000000
R13: 0000000000000008 R14: ffff888001000000 R15: 0000000000000007
FS:  00007f5d37b95700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000000 CR3: 0000000091357000 CR4: 00000000003506e0
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	31 ed                	xor    %ebp,%ebp
   4:	31 ff                	xor    %edi,%edi
   6:	89 de                	mov    %ebx,%esi
   8:	e8 3d 6f 27 fd       	callq  0xfd276f4a
   d:	4c 63 64 24 08       	movslq 0x8(%rsp),%r12
  12:	44 8d 7b ff          	lea    -0x1(%rbx),%r15d
  16:	ff 4c 24 04          	decl   0x4(%rsp)
  1a:	85 db                	test   %ebx,%ebx
  1c:	74 33                	je     0x51
  1e:	44 89 fb             	mov    %r15d,%ebx
  21:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  28:	00 00
* 2a:	41 88 2e             	mov    %bpl,(%r14) <-- trapping instruction
  2d:	85 db                	test   %ebx,%ebx
  2f:	74 0c                	je     0x3d
  31:	49 ff c6             	inc    %r14
  34:	e8 01 6b 27 fd       	callq  0xfd276b3a
  39:	ff cb                	dec    %ebx
  3b:	eb ed                	jmp    0x2a
  3d:	e8                   	.byte 0xe8
  3e:	f8                   	clc
  3f:	6a                   	.byte 0x6a