BUG: unable to handle kernel paging request at ffff8880ffffd800
IP: writeb arch/x86/include/asm/io.h:65 [inline]
IP: vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1169 [inline]
IP: vga16fb_imageblit+0x9e4/0x2140 drivers/video/fbdev/vga16fb.c:1261
PGD c9c5067 P4D c9c5067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 23810 Comm: syz-executor.2 Not tainted 4.14.212-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88804bb6c300 task.stack: ffff8880b53e8000
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1169 [inline]
RIP: 0010:vga16fb_imageblit+0x9e4/0x2140 drivers/video/fbdev/vga16fb.c:1261
RSP: 0018:ffff8880b53ef560 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffffc900088fc000
RDX: 0000000000000000 RSI: ffff8880ffffd800 RDI: ffff8880b53ef70c
RBP: ffff8880b53ef6fc R08: 00000000ffffff30 R09: 0000000000000000
R10: 0000000000000050 R11: 0000000000000000 R12: ffff888238892d50
R13: ffff8880b53ef6f8 R14: ffff8880b0ae8240 R15: 0000000000000000
FS:  00007f256f4b5700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880ffffd800 CR3: 00000000a20a5000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 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
 fbcon_redraw_move.constprop.0+0x23a/0x280 drivers/video/fbdev/core/fbcon.c:1523
 ypan_down_redraw drivers/video/fbdev/core/fbcon.c:1481 [inline]
 fbcon_scroll+0x2af9/0x31e0 drivers/video/fbdev/core/fbcon.c:1811
 con_scroll+0x2c5/0x360 drivers/tty/vt/vt.c:327
 csi_L drivers/tty/vt/vt.c:1657 [inline]
 do_con_trol+0x2b57/0x51e0 drivers/tty/vt/vt.c:2036
 do_con_write+0x9fb/0x19b0 drivers/tty/vt/vt.c:2454
 con_write+0x21/0xa0 drivers/tty/vt/vt.c:2805
 process_output_block drivers/tty/n_tty.c:595 [inline]
 n_tty_write+0x352/0xda0 drivers/tty/n_tty.c:2333
 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: 0033:0x45e229
RSP: 002b:00007f256f4b4c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e229
RDX: 0000000000001006 RSI: 0000000020001440 RDI: 0000000000000004
RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007fff1106f0ef R14: 00007f256f4b59c0 R15: 000000000119bf8c
Code: df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 85 45 3b fe 41 8b 45 14 48 8b 74 24 08 <88> 06 0f ae e8 8a 06 b8 05 00 00 00 ba ce 03 00 00 ee 48 c7 c2 
RIP: writeb arch/x86/include/asm/io.h:65 [inline] RSP: ffff8880b53ef560
RIP: vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1169 [inline] RSP: ffff8880b53ef560
RIP: vga16fb_imageblit+0x9e4/0x2140 drivers/video/fbdev/vga16fb.c:1261 RSP: ffff8880b53ef560
CR2: ffff8880ffffd800
---[ end trace c3691424b7201ef3 ]---