BUG: unable to handle page fault for address: ffff8880ffe92c35
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD d601067 P4D d601067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 2358 Comm: syz-executor.5 Not tainted 5.8.0-rc3-next-20200703-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:1168 [inline]
RIP: 0010:vga16fb_imageblit+0xa50/0x2210 drivers/video/fbdev/vga16fb.c:1260
Code: 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 19 78 eb fd 41 8b 47 14 48 8b 4c 24 08 <88> 01 0f ae e8 8a 01 b8 05 00 00 00 ba ce 03 00 00 ee 48 c7 c2 f8
RSP: 0018:ffffc9001468f428 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffff8880ffe92c35
RDX: 0000000000000000 RSI: ffffffff83c82a12 RDI: ffff888056833e14
RBP: ffff888056833e04 R08: ffff8880a37d46e0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8132b3d0
R13: ffff8880a37d46e0 R14: ffff888056833e20 R15: ffff888056833e00
FS:  00007f54d5c9d700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880ffe92c35 CR3: 000000021a824000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 soft_cursor+0x514/0xa30 drivers/video/fbdev/core/softcursor.c:74
 bit_cursor+0x1166/0x17d0 drivers/video/fbdev/core/bitblit.c:386
 fbcon_cursor+0x537/0x660 drivers/video/fbdev/core/fbcon.c:1411
 hide_cursor+0x85/0x280 drivers/tty/vt/vt.c:906
 redraw_screen+0x5e3/0x770 drivers/tty/vt/vt.c:1011
 vc_do_resize+0xeec/0x1170 drivers/tty/vt/vt.c:1319
 fbcon_do_set_font+0x4ad/0x950 drivers/video/fbdev/core/fbcon.c:2609
 fbcon_set_font+0x767/0x8b0 drivers/video/fbdev/core/fbcon.c:2706
 con_font_set drivers/tty/vt/vt.c:4655 [inline]
 con_font_op+0xd25/0x1110 drivers/tty/vt/vt.c:4720
 vt_io_ioctl drivers/tty/vt/vt_ioctl.c:595 [inline]
 vt_ioctl+0x1be1/0x2c20 drivers/tty/vt/vt_ioctl.c:846
 tty_ioctl+0x1019/0x15f0 drivers/tty/tty_io.c:2656
 vfs_ioctl fs/ioctl.c:48 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:753
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl fs/ioctl.c:760 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:367
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cb29
Code: Bad RIP value.
RSP: 002b:00007f54d5c9cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004ef860 RCX: 000000000045cb29
RDX: 0000000020000040 RSI: 0000000000004b61 RDI: 0000000000000003
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000587 R14: 00000000004c84e3 R15: 00007f54d5c9d6d4
Modules linked in:
CR2: ffff8880ffe92c35
---[ end trace c809b464aaf737f1 ]---
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1168 [inline]
RIP: 0010:vga16fb_imageblit+0xa50/0x2210 drivers/video/fbdev/vga16fb.c:1260
Code: 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 19 78 eb fd 41 8b 47 14 48 8b 4c 24 08 <88> 01 0f ae e8 8a 01 b8 05 00 00 00 ba ce 03 00 00 ee 48 c7 c2 f8
RSP: 0018:ffffc9001468f428 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffff8880ffe92c35
RDX: 0000000000000000 RSI: ffffffff83c82a12 RDI: ffff888056833e14
RBP: ffff888056833e04 R08: ffff8880a37d46e0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8132b3d0
R13: ffff8880a37d46e0 R14: ffff888056833e20 R15: ffff888056833e00
FS:  00007f54d5c9d700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880ffe92c35 CR3: 000000021a824000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400