BUG: unable to handle page fault for address: ffff8880ffffea20 #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: 8137 Comm: syz-executor.2 Not tainted 5.8.0-rc3-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 c9 e7 ec 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 38 RSP: 0018:ffffc9001817f5c8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffff8880ffffea20 RDX: 0000000000000000 RSI: ffffffff83c62222 RDI: ffffc9001817f764 RBP: ffffc9001817f754 R08: 00000000fffffe35 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff813293d0 R13: ffff8880a30c978e R14: ffffc9001817f770 R15: ffffc9001817f750 FS: 00007f175d926700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8880ffffea20 CR3: 0000000044a52000 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+0x6e1/0xd20 drivers/video/fbdev/core/bitblit.c:188 fbcon_putcs+0x33c/0x3f0 drivers/video/fbdev/core/fbcon.c:1362 fbcon_redraw_move.constprop.0+0x1a3/0x2b0 drivers/video/fbdev/core/fbcon.c:1732 ypan_down_redraw drivers/video/fbdev/core/fbcon.c:1607 [inline] fbcon_scroll+0x2c9e/0x3600 drivers/video/fbdev/core/fbcon.c:2057 con_scroll+0x5b9/0x6d0 drivers/tty/vt/vt.c:637 ri drivers/tty/vt/vt.c:1498 [inline] do_con_trol drivers/tty/vt/vt.c:2197 [inline] do_con_write+0x5314/0x7400 drivers/tty/vt/vt.c:2823 con_write+0x22/0xb0 drivers/tty/vt/vt.c:3159 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+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+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007f175d925c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000050df60 RCX: 000000000045cb29 RDX: 0000000000001006 RSI: 0000000020001040 RDI: 0000000000000006 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000d23 R14: 00000000004cf7c7 R15: 00007f175d9266d4 Modules linked in: CR2: ffff8880ffffea20 ---[ end trace 5ad21bec3a0a5bba ]--- 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 c9 e7 ec 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 38 RSP: 0018:ffffc9001817f5c8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffff8880ffffea20 RDX: 0000000000000000 RSI: ffffffff83c62222 RDI: ffffc9001817f764 RBP: ffffc9001817f754 R08: 00000000fffffe35 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff813293d0 R13: ffff8880a30c978e R14: ffffc9001817f770 R15: ffffc9001817f750 FS: 00007f175d926700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8880ffffea20 CR3: 0000000044a52000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400