BUG: unable to handle kernel paging request at ffff888001000003
IP: writeb arch/x86/include/asm/io.h:65 [inline]
IP: vga16fb_fillrect+0x910/0x1820 drivers/video/fbdev/vga16fb.c:923
PGD c9de067 P4D c9de067 PUD c9df067 PMD 80000000010001e1 
Oops: 0003 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 11484 Comm: syz-executor.0 Not tainted 4.14.291-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
task: ffff88809bc6a5c0 task.stack: ffff888063dd8000
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga16fb_fillrect+0x910/0x1820 drivers/video/fbdev/vga16fb.c:923
RSP: 0018:ffff888063ddf6f8 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff888001000003 RCX: ffffc90006018000
RDX: 0000000000040000 RSI: ffffffff833d9b50 RDI: ffff888063ddf798
RBP: 000000000000007d R08: 0000000000000001 R09: ffffed1016136e2b
R10: ffff8880b09b715f R11: 0000000000000000 R12: 000000001ffe1400
R13: 0000000000000003 R14: ffff888001000080 R15: 0000000000000000
FS:  00007efdcc0fd700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000003 CR3: 00000000b4759000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 bit_clear_margins+0x3af/0x480 drivers/video/fbdev/core/bitblit.c:224
 fbcon_clear_margins+0x1bb/0x300 drivers/video/fbdev/core/fbcon.c:1266
 fbcon_switch+0xde0/0x19e0 drivers/video/fbdev/core/fbcon.c:2133
 redraw_screen+0x32c/0x790 drivers/tty/vt/vt.c:689
 vc_do_resize+0xc41/0xe40 drivers/tty/vt/vt.c:991
 vt_ioctl+0x871/0x1b90 drivers/tty/vt/vt_ioctl.c:812
 tty_ioctl+0x50f/0x1430 drivers/tty/tty_io.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7efdcd788279
RSP: 002b:00007efdcc0fd168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007efdcd89af80 RCX: 00007efdcd788279
RDX: 0000000020000180 RSI: 0000000000005609 RDI: 0000000000000003
RBP: 00007efdcd7e22e9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcfa59605f R14: 00007efdcc0fd300 R15: 0000000000022000
Code: 85 e4 0f 84 ea fc ff ff e8 4e ac 17 fe 4d 63 ed 45 31 ff e8 43 ac 17 fe 41 89 ee 49 01 de 85 ed 0f 84 7c 06 00 00 e8 30 ac 17 fe <44> 88 3b 48 83 c3 01 4c 39 f3 75 ef e8 1f ac 17 fe 4b 8d 1c 2e 
RIP: writeb arch/x86/include/asm/io.h:65 [inline] RSP: ffff888063ddf6f8
RIP: vga16fb_fillrect+0x910/0x1820 drivers/video/fbdev/vga16fb.c:923 RSP: ffff888063ddf6f8
CR2: ffff888001000003
---[ end trace 827663135bcb53c5 ]---
----------------
Code disassembly (best guess):
   0:	85 e4                	test   %esp,%esp
   2:	0f 84 ea fc ff ff    	je     0xfffffcf2
   8:	e8 4e ac 17 fe       	callq  0xfe17ac5b
   d:	4d 63 ed             	movslq %r13d,%r13
  10:	45 31 ff             	xor    %r15d,%r15d
  13:	e8 43 ac 17 fe       	callq  0xfe17ac5b
  18:	41 89 ee             	mov    %ebp,%r14d
  1b:	49 01 de             	add    %rbx,%r14
  1e:	85 ed                	test   %ebp,%ebp
  20:	0f 84 7c 06 00 00    	je     0x6a2
  26:	e8 30 ac 17 fe       	callq  0xfe17ac5b
* 2b:	44 88 3b             	mov    %r15b,(%rbx) <-- trapping instruction
  2e:	48 83 c3 01          	add    $0x1,%rbx
  32:	4c 39 f3             	cmp    %r14,%rbx
  35:	75 ef                	jne    0x26
  37:	e8 1f ac 17 fe       	callq  0xfe17ac5b
  3c:	4b 8d 1c 2e          	lea    (%r14,%r13,1),%rbx