BUG: unable to handle page fault for address: ffff8880fffe3900
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD fc01067 P4D fc01067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 16765 Comm: syz-executor.3 Not tainted 5.10.0-rc5-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 89 c3 c7 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 18
RSP: 0018:ffffc9000c307530 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffff8880fffe3900
RDX: 0000000000000000 RSI: ffffffff83e9cc92 RDI: ffffc9000c3076cc
RBP: ffffc9000c3076bc R08: 00000000ffffff37 R09: 0000000000000000
R10: 0000000000000000 R11: 0720072007200720 R12: ffffffff812f6920
R13: ffff8881436d41b0 R14: ffffc9000c3076d8 R15: ffffc9000c3076b8
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0063) knlGS:00000000f556cb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffff8880fffe3900 CR3: 0000000013511000 CR4: 00000000001526e0
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+0x6e1/0xd20 drivers/video/fbdev/core/bitblit.c:188
 fbcon_putcs+0x35a/0x450 drivers/video/fbdev/core/fbcon.c:1306
 fbcon_redraw_move.constprop.0+0x264/0x2b0 drivers/video/fbdev/core/fbcon.c:1582
 ypan_down_redraw drivers/video/fbdev/core/fbcon.c:1540 [inline]
 fbcon_scroll+0x2c97/0x3580 drivers/video/fbdev/core/fbcon.c:1868
 con_scroll+0x5b9/0x6d0 drivers/tty/vt/vt.c:630
 ri drivers/tty/vt/vt.c:1505 [inline]
 do_con_trol+0x1f74/0x54c0 drivers/tty/vt/vt.c:2218
 do_con_write+0xb89/0x1dd0 drivers/tty/vt/vt.c:2911
 con_write+0x22/0xb0 drivers/tty/vt/vt.c:3255
 process_output_block drivers/tty/n_tty.c:595 [inline]
 n_tty_write+0x3ce/0xf80 drivers/tty/n_tty.c:2333
 do_tty_write drivers/tty/tty_io.c:962 [inline]
 tty_write+0x4d9/0x870 drivers/tty/tty_io.c:1046
 vfs_write+0x28e/0xa30 fs/read_write.c:603
 ksys_write+0x12d/0x250 fs/read_write.c:658
 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline]
 __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f72549
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f556c0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001440
RDX: 000000000000fd95 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
CR2: ffff8880fffe3900
---[ end trace 592ce04e8f3fa60c ]---
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 89 c3 c7 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 18
RSP: 0018:ffffc9000c307530 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffff8880fffe3900
RDX: 0000000000000000 RSI: ffffffff83e9cc92 RDI: ffffc9000c3076cc
RBP: ffffc9000c3076bc R08: 00000000ffffff37 R09: 0000000000000000
R10: 0000000000000000 R11: 0720072007200720 R12: ffffffff812f6920
R13: ffff8881436d41b0 R14: ffffc9000c3076d8 R15: ffffc9000c3076b8
FS:  0000000000000000(0000) GS:ffff8880b9f00000(0063) knlGS:00000000f556cb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: ffff8880fffe3900 CR3: 0000000013511000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400