BUG: unable to handle page fault for address: ffff888001000040
#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: 33 Comm: kworker/1:1 Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events console_callback
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+0xcee/0x1cb0 drivers/video/fbdev/vga16fb.c:1260
Code: 66 66 2e 0f 1f 84 00 00 00 00 00 90 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 1b 41 0f b6 04 24 <41> 88 06 85 ed 74 2b 49 ff c4 49 ff c6 e8 80 ae 43 fd ff cd eb cc
RSP: 0018:ffffc90000e5f620 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888001000040 RCX: dffffc0000000000
RDX: ffff888012439c40 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff843b289b R09: 0000000000000000
R10: 0000000000000002 R11: ffff888012439c40 R12: ffff888019140928
R13: ffffc90000e5f84c R14: ffff888001000040 R15: 0000000000000004
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000040 CR3: 0000000022dde000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 bit_putcs+0x18e8/0x1de0 drivers/video/fbdev/core/bitblit.c:105
 fbcon_putcs+0x2ae/0x430 drivers/video/fbdev/core/fbcon.c:1296
 do_update_region+0x4d6/0x6a0 drivers/tty/vt/vt.c:676
 redraw_screen+0x8f6/0x1270 drivers/tty/vt/vt.c:1035
 complete_change_console+0xcd/0x740 drivers/tty/vt/vt_ioctl.c:1100
 console_callback+0x177/0x460 drivers/tty/vt/vt.c:2946
 process_one_work+0x833/0x10c0 kernel/workqueue.c:2275
 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421
 kthread+0x39a/0x3c0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
CR2: ffff888001000040
---[ end trace 00272076511b9489 ]---
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+0xcee/0x1cb0 drivers/video/fbdev/vga16fb.c:1260
Code: 66 66 2e 0f 1f 84 00 00 00 00 00 90 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 1b 41 0f b6 04 24 <41> 88 06 85 ed 74 2b 49 ff c4 49 ff c6 e8 80 ae 43 fd ff cd eb cc
RSP: 0018:ffffc90000e5f620 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888001000040 RCX: dffffc0000000000
RDX: ffff888012439c40 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff843b289b R09: 0000000000000000
R10: 0000000000000002 R11: ffff888012439c40 R12: ffff888019140928
R13: ffffc90000e5f84c R14: ffff888001000040 R15: 0000000000000004
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000040 CR3: 0000000022dde000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400