BUG: unable to handle kernel paging request at ffff888001000108
IP: __writel arch/x86/include/asm/io.h:71 [inline]
IP: slow_imageblit drivers/video/fbdev/core/cfbimgblt.c:178 [inline]
IP: cfb_imageblit+0xa30/0xe40 drivers/video/fbdev/core/cfbimgblt.c:302
PGD c9da067 P4D c9da067 PUD c9db067 PMD 80000000010001e1 
Oops: 0003 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 19168 Comm: syz-executor.0 Not tainted 4.14.262-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809213e680 task.stack: ffff8880a2560000
RIP: 0010:__writel arch/x86/include/asm/io.h:71 [inline]
RIP: 0010:slow_imageblit drivers/video/fbdev/core/cfbimgblt.c:178 [inline]
RIP: 0010:cfb_imageblit+0xa30/0xe40 drivers/video/fbdev/core/cfbimgblt.c:302
RSP: 0018:ffff8880a2567580 EFLAGS: 00010246
RAX: ffff88800100010c RBX: 000000000000001c RCX: ffffc90005bcc000
RDX: 0000000000040000 RSI: ffff888001000108 RDI: dffffc0000000000
RBP: 0000000000000000 R08: 0000000000000844 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8882388b8a2e
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f64569d4700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000108 CR3: 00000000b3bb7000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1208 [inline]
 vga16fb_imageblit+0x630/0x2140 drivers/video/fbdev/vga16fb.c:1261
 bit_putcs_unaligned drivers/video/fbdev/core/bitblit.c:139 [inline]
 bit_putcs+0x81e/0xc30 drivers/video/fbdev/core/bitblit.c:188
 fbcon_putcs+0x2fe/0x480 drivers/video/fbdev/core/fbcon.c:1247
 con_flush drivers/tty/vt/vt.c:2223 [inline]
 do_con_write+0xaf6/0x19b0 drivers/tty/vt/vt.c:2473
 con_put_char+0x78/0xa0 drivers/tty/vt/vt.c:2832
 tty_put_char+0xa3/0x120 drivers/tty/tty_io.c:2884
 do_output_char+0x126/0x750 drivers/tty/n_tty.c:488
 process_output drivers/tty/n_tty.c:514 [inline]
 n_tty_write+0x3e3/0xda0 drivers/tty/n_tty.c:2345
 do_tty_write drivers/tty/tty_io.c:959 [inline]
 tty_write+0x410/0x740 drivers/tty/tty_io.c:1043
 __vfs_write+0xe4/0x630 fs/read_write.c:480
 vfs_write+0x17f/0x4d0 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xf2/0x210 fs/read_write.c:582
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f645805efe9
RSP: 002b:00007f64569d4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6458171f60 RCX: 00007f645805efe9
RDX: 0000000000001006 RSI: 0000000020002080 RDI: 0000000000000004
RBP: 00007f64580b908d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe83debc4f R14: 00007f64569d4300 R15: 0000000000022000
Code: 45 7c 24 20 e8 62 5e 1b fe 89 d9 44 89 f8 d3 e0 41 09 c5 39 5c 24 08 0f 87 76 ff ff ff e8 49 5e 1b fe 48 8b 74 24 10 48 8d 46 04 <44> 89 2e 39 5c 24 08 0f 85 44 ff ff ff 45 31 ed 48 89 44 24 10 
RIP: __writel arch/x86/include/asm/io.h:71 [inline] RSP: ffff8880a2567580
RIP: slow_imageblit drivers/video/fbdev/core/cfbimgblt.c:178 [inline] RSP: ffff8880a2567580
RIP: cfb_imageblit+0xa30/0xe40 drivers/video/fbdev/core/cfbimgblt.c:302 RSP: ffff8880a2567580
CR2: ffff888001000108
---[ end trace 1cd2b963b466cd57 ]---
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	24 20                	and    $0x20,%al
   2:	e8 62 5e 1b fe       	callq  0xfe1b5e69
   7:	89 d9                	mov    %ebx,%ecx
   9:	44 89 f8             	mov    %r15d,%eax
   c:	d3 e0                	shl    %cl,%eax
   e:	41 09 c5             	or     %eax,%r13d
  11:	39 5c 24 08          	cmp    %ebx,0x8(%rsp)
  15:	0f 87 76 ff ff ff    	ja     0xffffff91
  1b:	e8 49 5e 1b fe       	callq  0xfe1b5e69
  20:	48 8b 74 24 10       	mov    0x10(%rsp),%rsi
  25:	48 8d 46 04          	lea    0x4(%rsi),%rax
* 29:	44 89 2e             	mov    %r13d,(%rsi) <-- trapping instruction
  2c:	39 5c 24 08          	cmp    %ebx,0x8(%rsp)
  30:	0f 85 44 ff ff ff    	jne    0xffffff7a
  36:	45 31 ed             	xor    %r13d,%r13d
  39:	48 89 44 24 10       	mov    %rax,0x10(%rsp)