BUG: unable to handle page fault for address: ffff8880ffffce00
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD d401067 P4D d401067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 30306 Comm: syz-executor.4 Not tainted 5.7.0-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+0xa5b/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 4e a3 eb fd 41 8b 47 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 b8
RSP: 0018:ffffc9000606f4f8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffffc900120f6000
RDX: 0000000000000000 RSI: ffff8880ffffce00 RDI: ffffc9000606f68c
RBP: ffffc9000606f67c R08: ffff88802fbb8340 R09: 0000000000000000
R10: ffff88821aaf14df R11: ffffed104355e29b R12: 0000000000000000
R13: ffff8880a3975290 R14: 0000000000000001 R15: ffffc9000606f678
FS:  00007fca920eb700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880ffffce00 CR3: 000000005095e000 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+0x8d0/0xd60 drivers/video/fbdev/core/bitblit.c:188
 fbcon_putcs+0x345/0x3f0 drivers/video/fbdev/core/fbcon.c:1362
 fbcon_redraw_move.isra.0+0x269/0x2b0 drivers/video/fbdev/core/fbcon.c:1742
 ypan_down_redraw drivers/video/fbdev/core/fbcon.c:1607 [inline]
 fbcon_scroll+0x2cba/0x3620 drivers/video/fbdev/core/fbcon.c:2057
 con_scroll+0x405/0x6a0 drivers/tty/vt/vt.c:637
 ri drivers/tty/vt/vt.c:1498 [inline]
 do_con_trol+0x289e/0x5d80 drivers/tty/vt/vt.c:2197
 do_con_write.part.0+0xf34/0x1dc0 drivers/tty/vt/vt.c:2823
 do_con_write drivers/tty/vt/vt.c:2593 [inline]
 con_write+0x41/0xe0 drivers/tty/vt/vt.c:3159
 process_output_block drivers/tty/n_tty.c:595 [inline]
 n_tty_write+0x3f0/0xf90 drivers/tty/n_tty.c:2333
 do_tty_write drivers/tty/tty_io.c:962 [inline]
 tty_write+0x495/0x800 drivers/tty/tty_io.c:1046
 __vfs_write+0x76/0x100 fs/read_write.c:495
 vfs_write+0x268/0x5d0 fs/read_write.c:559
 ksys_write+0x12d/0x250 fs/read_write.c:612
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca59
Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fca920eac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000050d800 RCX: 000000000045ca59
RDX: 0000000000001006 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000d12 R14: 00000000004cf68a R15: 00007fca920eb6d4
Modules linked in:
CR2: ffff8880ffffce00
---[ end trace 837568c845420c57 ]---
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+0xa5b/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 4e a3 eb fd 41 8b 47 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 b8
RSP: 0018:ffffc9000606f4f8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffffc900120f6000
RDX: 0000000000000000 RSI: ffff8880ffffce00 RDI: ffffc9000606f68c
RBP: ffffc9000606f67c R08: ffff88802fbb8340 R09: 0000000000000000
R10: ffff88821aaf14df R11: ffffed104355e29b R12: 0000000000000000
R13: ffff8880a3975290 R14: 0000000000000001 R15: ffffc9000606f678
FS:  00007fca920eb700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880ffffce00 CR3: 000000005095e000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400