BUG: unable to handle page fault for address: ffff888001000040
#PF: supervisor write access in kernel mode
#PF: error_code(0x0003) - permissions violation
PGD 10401067 P4D 10401067 PUD 10402067 PMD 80000000010001e1 
Oops: 0003 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1 Comm: systemd Not tainted 5.12.0-rc2-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:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1176 [inline]
RIP: 0010:vga16fb_imageblit+0xbe9/0x2210 drivers/video/fbdev/vga16fb.c:1260
Code: 83 c5 01 48 89 f8 48 89 f9 48 83 c3 01 48 c1 e8 03 83 e1 07 42 0f b6 04 20 38 c8 7f 08 84 c0 0f 85 27 0f 00 00 41 0f b6 45 ff <88> 02 44 89 f6 31 ff 44 29 ee e8 88 6e 79 fd 49 39 ed 75 b6 4c 89
RSP: 0018:ffffc90000c67570 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888001000041 RCX: 0000000000000000
RDX: ffff888001000040 RSI: ffffffff83fa38d8 RDI: ffff888143275420
RBP: ffff888143275428 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff83fa38bd R11: 0000000000000001 R12: dffffc0000000000
R13: ffff888143275421 R14: 0000000043275428 R15: 0000000000000004
FS:  00007fb5e3ae3500(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000040 CR3: 00000000219a8000 CR4: 0000000000350ee0
Call Trace:
 bit_putcs_unaligned drivers/video/fbdev/core/bitblit.c:139 [inline]
 bit_putcs+0x6e1/0xd20 drivers/video/fbdev/core/bitblit.c:188
 fbcon_putcs+0x35a/0x450 drivers/video/fbdev/core/fbcon.c:1296
 do_update_region+0x399/0x630 drivers/tty/vt/vt.c:676
 redraw_screen+0x61f/0x740 drivers/tty/vt/vt.c:1035
 fbcon_blank+0x8c5/0xc30 drivers/video/fbdev/core/fbcon.c:2204
 do_unblank_screen+0x25b/0x470 drivers/tty/vt/vt.c:4405
 vt_kdsetmode drivers/tty/vt/vt_ioctl.c:276 [inline]
 vt_k_ioctl drivers/tty/vt/vt_ioctl.c:381 [inline]
 vt_ioctl+0x1ab3/0x27f0 drivers/tty/vt/vt_ioctl.c:713
 tty_ioctl+0xed8/0x1710 drivers/tty/tty_io.c:2802
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb5e20b2017
Code: 00 00 00 48 8b 05 81 7e 2b 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 51 7e 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffe6932f9a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 00007fb5e20b2017
RDX: 0000000000000000 RSI: 0000000000004b3a RDI: 0000000000000013
RBP: 0000000000000001 R08: 00007ffe6932f9a0 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 000055b506c511c0
Modules linked in:
CR2: ffff888001000040
---[ end trace e574b234ae8bb5ac ]---
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1176 [inline]
RIP: 0010:vga16fb_imageblit+0xbe9/0x2210 drivers/video/fbdev/vga16fb.c:1260
Code: 83 c5 01 48 89 f8 48 89 f9 48 83 c3 01 48 c1 e8 03 83 e1 07 42 0f b6 04 20 38 c8 7f 08 84 c0 0f 85 27 0f 00 00 41 0f b6 45 ff <88> 02 44 89 f6 31 ff 44 29 ee e8 88 6e 79 fd 49 39 ed 75 b6 4c 89
RSP: 0018:ffffc90000c67570 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888001000041 RCX: 0000000000000000
RDX: ffff888001000040 RSI: ffffffff83fa38d8 RDI: ffff888143275420
RBP: ffff888143275428 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff83fa38bd R11: 0000000000000001 R12: dffffc0000000000
R13: ffff888143275421 R14: 0000000043275428 R15: 0000000000000004
FS:  00007fb5e3ae3500(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000040 CR3: 00000000219a8000 CR4: 0000000000350ee0