BUG: unable to handle page fault for address: ffff8880fffffb00
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD e201067 P4D e201067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 28067 Comm: syz-executor.4 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: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 99 1d 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 d8
RSP: 0018:ffffc90016fdf730 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffff8880fffffb00
RDX: 0000000000000000 RSI: ffffffff83eff422 RDI: ffff88821911b694
RBP: ffff88821911b684 R08: ffff8880a2eb990f R09: ffffffff8d0c09e7
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff813403f0
R13: ffff8880a2eb9900 R14: ffff88821911b6a0 R15: ffff88821911b680
FS:  00007f02f1b4e700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880fffffb00 CR3: 000000000011e000 CR4: 00000000001506e0
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+0xcfe/0x1720 drivers/video/fbdev/core/bitblit.c:377
 fbcon_cursor+0x50e/0x620 drivers/video/fbdev/core/fbcon.c:1348
 set_cursor drivers/tty/vt/vt.c:919 [inline]
 set_cursor+0x1d2/0x240 drivers/tty/vt/vt.c:910
 con_flush_chars drivers/tty/vt/vt.c:3330 [inline]
 con_flush_chars drivers/tty/vt/vt.c:3319 [inline]
 con_write+0x8f/0xb0 drivers/tty/vt/vt.c:3251
 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
 do_loop_readv_writev fs/read_write.c:737 [inline]
 do_loop_readv_writev fs/read_write.c:721 [inline]
 do_iter_write+0x489/0x670 fs/read_write.c:1020
 vfs_writev+0x1aa/0x2e0 fs/read_write.c:1091
 do_writev+0x139/0x300 fs/read_write.c:1134
 do_syscall_64+0x2d/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:00007f02f1b4dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 000000000003a680 RCX: 000000000045dd99
RDX: 0000000000000001 RSI: 0000000020000100 RDI: 0000000000000004
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007fff35aaca5f R14: 00007f02f1b4e9c0 R15: 000000000118bf2c
Modules linked in:
CR2: ffff8880fffffb00
---[ end trace e7110ae55999e60b ]---
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 99 1d 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 d8
RSP: 0018:ffffc90016fdf730 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffff8880fffffb00
RDX: 0000000000000000 RSI: ffffffff83eff422 RDI: ffff88821911b694
RBP: ffff88821911b684 R08: ffff8880a2eb990f R09: ffffffff8d0c09e7
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff813403f0
R13: ffff8880a2eb9900 R14: ffff88821911b6a0 R15: ffff88821911b680
FS:  00007f02f1b4e700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880fffffb00 CR3: 000000000011e000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400