BUG: unable to handle page fault for address: ffff888001000028
#PF: supervisor write access in kernel mode
#PF: error_code(0x0003) - permissions violation
PGD c801067 P4D c801067 PUD c802067 PMD 80000000010001e1 
Oops: 0003 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 14523 Comm: syz-executor.2 Not tainted 5.9.0-rc7-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:1176 [inline]
RIP: 0010:vga16fb_imageblit+0xcfe/0x1cd0 drivers/video/fbdev/vga16fb.c:1260
Code: 66 90 66 2e 0f 1f 84 00 00 00 00 00 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 1b 41 0f b6 04 24 <41> 88 06 85 ed 74 2b 49 ff c4 49 ff c6 e8 c0 8f 7d fd ff cd eb cc
RSP: 0018:ffffc90006f67648 EFLAGS: 00010246
RAX: 0000000000000060 RBX: ffff888001000028 RCX: dffffc0000000000
RDX: ffff8880477d0180 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff83f76d7b R09: 0000000000000000
R10: 0000000000000002 R11: ffff8880477d0180 R12: ffff8880a31c1718
R13: ffffc90006f6782c R14: ffff888001000028 R15: 0000000000000008
FS:  00007f679629f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000028 CR3: 000000008894a000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 bit_putcs+0x17ac/0x1bf0 drivers/video/fbdev/core/bitblit.c:105
 fbcon_putcs+0x790/0xaf0 drivers/video/fbdev/core/fbcon.c:1308
 con_flush drivers/tty/vt/vt.c:2575 [inline]
 vc_con_write_normal drivers/tty/vt/vt.c:2803 [inline]
 do_con_write+0x115b/0xd580 drivers/tty/vt/vt.c:2910
 con_write+0x20/0x40 drivers/tty/vt/vt.c:3250
 process_output_block drivers/tty/n_tty.c:595 [inline]
 n_tty_write+0xcbf/0x1170 drivers/tty/n_tty.c:2333
 do_tty_write drivers/tty/tty_io.c:962 [inline]
 tty_write+0x593/0x940 drivers/tty/tty_io.c:1046
 vfs_write+0x2d3/0xd10 fs/read_write.c:584
 ksys_write+0x11b/0x220 fs/read_write.c:639
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45dd99
Code: 0d b4 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f679629ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000003a5c0 RCX: 000000000045dd99
RDX: 0000000000001006 RSI: 0000000020001440 RDI: 0000000000000005
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffc2087eacf R14: 00007f679629f9c0 R15: 000000000118bf2c
Modules linked in:
CR2: ffff888001000028
---[ end trace 4f6cdd9476ae70fb ]---
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1176 [inline]
RIP: 0010:vga16fb_imageblit+0xcfe/0x1cd0 drivers/video/fbdev/vga16fb.c:1260
Code: 66 90 66 2e 0f 1f 84 00 00 00 00 00 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 1b 41 0f b6 04 24 <41> 88 06 85 ed 74 2b 49 ff c4 49 ff c6 e8 c0 8f 7d fd ff cd eb cc
RSP: 0018:ffffc90006f67648 EFLAGS: 00010246
RAX: 0000000000000060 RBX: ffff888001000028 RCX: dffffc0000000000
RDX: ffff8880477d0180 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff83f76d7b R09: 0000000000000000
R10: 0000000000000002 R11: ffff8880477d0180 R12: ffff8880a31c1718
R13: ffffc90006f6782c R14: ffff888001000028 R15: 0000000000000008
FS:  00007f679629f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000028 CR3: 000000008894a000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400