BUG: unable to handle kernel paging request at ffff8880fffe3180 PGD de01067 P4D de01067 PUD 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3481 Comm: syz-executor.4 Not tainted 4.19.211-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+0xa85/0x2260 drivers/video/fbdev/vga16fb.c:1260 Code: 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 07 e5 f9 fd 48 8b 04 24 48 8b 7c 24 10 8b 40 14 <88> 07 0f ae e8 8a 07 b8 05 00 00 00 ba ce 03 00 00 ee 48 c7 c2 10 RSP: 0018:ffff888096477438 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffffc90007641000 RDX: 0000000000000000 RSI: ffffffff839e79da RDI: ffff8880fffe3180 RBP: ffff8880964775cc R08: 00000000fffffe6d R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b070cd08 R13: ffff8880b07647e0 R14: ffff8880964775e8 R15: 0000000000000001 FS: 00007f7e1292d700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8880fffe3180 CR3: 00000000a8985000 CR4: 00000000003406e0 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+0x6e2/0xd10 drivers/video/fbdev/core/bitblit.c:188 fbcon_putcs+0x336/0x4f0 drivers/video/fbdev/core/fbcon.c:1269 fbcon_redraw_move.constprop.0+0x1a3/0x2b0 drivers/video/fbdev/core/fbcon.c:1538 ypan_down_redraw drivers/video/fbdev/core/fbcon.c:1506 [inline] fbcon_scroll+0x2db4/0x3440 drivers/video/fbdev/core/fbcon.c:1836 con_scroll+0x5f8/0x720 drivers/tty/vt/vt.c:637 csi_L drivers/tty/vt/vt.c:2030 [inline] do_con_trol+0x36aa/0x5970 drivers/tty/vt/vt.c:2409 do_con_write+0xbea/0x1d90 drivers/tty/vt/vt.c:2828 con_write+0x22/0xb0 drivers/tty/vt/vt.c:3163 n_tty_write+0xa03/0xff0 drivers/tty/n_tty.c:2354 do_tty_write drivers/tty/tty_io.c:960 [inline] tty_write+0x496/0x810 drivers/tty/tty_io.c:1044 __vfs_write+0xf7/0x770 fs/read_write.c:485 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f7e13fb8049 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7e1292d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f7e140caf60 RCX: 00007f7e13fb8049 RDX: 00000000000001b7 RSI: 0000000020001040 RDI: 0000000000000013 RBP: 00007f7e1401208d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdb006476f R14: 00007f7e1292d300 R15: 0000000000022000 Modules linked in: CR2: ffff8880fffe3180 ---[ end trace 6146485c629c63ac ]--- 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+0xa85/0x2260 drivers/video/fbdev/vga16fb.c:1260 Code: 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 07 e5 f9 fd 48 8b 04 24 48 8b 7c 24 10 8b 40 14 <88> 07 0f ae e8 8a 07 b8 05 00 00 00 ba ce 03 00 00 ee 48 c7 c2 10 RSP: 0018:ffff888096477438 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffffc90007641000 RDX: 0000000000000000 RSI: ffffffff839e79da RDI: ffff8880fffe3180 RBP: ffff8880964775cc R08: 00000000fffffe6d R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b070cd08 R13: ffff8880b07647e0 R14: ffff8880964775e8 R15: 0000000000000001 FS: 00007f7e1292d700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8880fffe3180 CR3: 00000000a8985000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 c1 ea 03 shr $0x3,%rdx 4: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx 8: 48 89 f8 mov %rdi,%rax b: 83 e0 07 and $0x7,%eax e: 83 c0 03 add $0x3,%eax 11: 38 d0 cmp %dl,%al 13: 7c 09 jl 0x1e 15: 84 d2 test %dl,%dl 17: 74 05 je 0x1e 19: e8 07 e5 f9 fd callq 0xfdf9e525 1e: 48 8b 04 24 mov (%rsp),%rax 22: 48 8b 7c 24 10 mov 0x10(%rsp),%rdi 27: 8b 40 14 mov 0x14(%rax),%eax * 2a: 88 07 mov %al,(%rdi) <-- trapping instruction 2c: 0f ae e8 lfence 2f: 8a 07 mov (%rdi),%al 31: b8 05 00 00 00 mov $0x5,%eax 36: ba ce 03 00 00 mov $0x3ce,%edx 3b: ee out %al,(%dx) 3c: 48 rex.W 3d: c7 .byte 0xc7 3e: c2 .byte 0xc2 3f: 10 .byte 0x10