BUG: unable to handle kernel paging request at ffff888001000180
IP: __writel syzkaller/managers/linux-4-14/kernel/./arch/x86/include/asm/io.h:71 [inline]
IP: slow_imageblit syzkaller/managers/linux-4-14/kernel/drivers/video/fbdev/core/cfbimgblt.c:178 [inline]
IP: cfb_imageblit+0xa30/0xe40 syzkaller/managers/linux-4-14/kernel/drivers/video/fbdev/core/cfbimgblt.c:302
PGD c9c5067 P4D c9c5067 PUD c9c6067 PMD 80000000010001e1 
Oops: 0003 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 16572 Comm: syz-executor.1 Not tainted 4.14.218-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88808fb5c100 task.stack: ffff88805ec20000
RIP: 0010:__writel syzkaller/managers/linux-4-14/kernel/./arch/x86/include/asm/io.h:71 [inline]
RIP: 0010:slow_imageblit syzkaller/managers/linux-4-14/kernel/drivers/video/fbdev/core/cfbimgblt.c:178 [inline]
RIP: 0010:cfb_imageblit+0xa30/0xe40 syzkaller/managers/linux-4-14/kernel/drivers/video/fbdev/core/cfbimgblt.c:302
RSP: 0018:ffff88805ec271c8 EFLAGS: 00010246
RAX: ffff888001000184 RBX: 000000000000001c RCX: ffffc90005edb000
RDX: 0000000000040000 RSI: ffff888001000180 RDI: dffffc0000000000
RBP: 0000000000000000 R08: 0000000000000626 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b0b19ef7
R13: 0000000007777770 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f92d939f700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888001000180 CR3: 00000000b524b000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 vga_imageblit_expand syzkaller/managers/linux-4-14/kernel/drivers/video/fbdev/vga16fb.c:1208 [inline]
 vga16fb_imageblit+0x630/0x2140 syzkaller/managers/linux-4-14/kernel/drivers/video/fbdev/vga16fb.c:1261
 bit_putcs_unaligned syzkaller/managers/linux-4-14/kernel/drivers/video/fbdev/core/bitblit.c:139 [inline]
 bit_putcs+0x81e/0xc30 syzkaller/managers/linux-4-14/kernel/drivers/video/fbdev/core/bitblit.c:188
 fbcon_putcs+0x2fe/0x480 syzkaller/managers/linux-4-14/kernel/drivers/video/fbdev/core/fbcon.c:1247
 con_flush syzkaller/managers/linux-4-14/kernel/drivers/tty/vt/vt.c:2206 [inline]
 do_con_write+0x9dd/0x19b0 syzkaller/managers/linux-4-14/kernel/drivers/tty/vt/vt.c:2453
 con_write+0x21/0xa0 syzkaller/managers/linux-4-14/kernel/drivers/tty/vt/vt.c:2805
 process_output_block syzkaller/managers/linux-4-14/kernel/drivers/tty/n_tty.c:595 [inline]
 n_tty_write+0x352/0xda0 syzkaller/managers/linux-4-14/kernel/drivers/tty/n_tty.c:2333
 do_tty_write syzkaller/managers/linux-4-14/kernel/drivers/tty/tty_io.c:959 [inline]
 tty_write+0x410/0x740 syzkaller/managers/linux-4-14/kernel/drivers/tty/tty_io.c:1043
 __vfs_write+0xe4/0x630 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:480
 __kernel_write+0xf5/0x330 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:501
 write_pipe_buf+0x143/0x1c0 syzkaller/managers/linux-4-14/kernel/fs/splice.c:797
 splice_from_pipe_feed syzkaller/managers/linux-4-14/kernel/fs/splice.c:502 [inline]
 __splice_from_pipe+0x326/0x7a0 syzkaller/managers/linux-4-14/kernel/fs/splice.c:626
 splice_from_pipe syzkaller/managers/linux-4-14/kernel/fs/splice.c:661 [inline]
 default_file_splice_write+0xc5/0x150 syzkaller/managers/linux-4-14/kernel/fs/splice.c:809
 do_splice_from syzkaller/managers/linux-4-14/kernel/fs/splice.c:851 [inline]
 direct_splice_actor+0x115/0x160 syzkaller/managers/linux-4-14/kernel/fs/splice.c:1018
 splice_direct_to_actor+0x27c/0x730 syzkaller/managers/linux-4-14/kernel/fs/splice.c:973
 do_splice_direct+0x164/0x210 syzkaller/managers/linux-4-14/kernel/fs/splice.c:1061
 do_sendfile+0x47f/0xb30 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:1441
 SYSC_sendfile64 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:1496 [inline]
 SyS_sendfile64+0x9b/0x110 syzkaller/managers/linux-4-14/kernel/fs/read_write.c:1488
 do_syscall_64+0x1d5/0x640 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x465b09
RSP: 002b:00007f92d939f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09
RDX: 0000000020000040 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000008001 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffda5df96ff R14: 00007f92d939f300 R15: 0000000000022000
Code: 45 7c 24 20 e8 52 e8 1c fe 89 d9 44 89 f8 d3 e0 41 09 c5 39 5c 24 08 0f 87 76 ff ff ff e8 39 e8 1c fe 48 8b 74 24 10 48 8d 46 04 <44> 89 2e 39 5c 24 08 0f 85 44 ff ff ff 45 31 ed 48 89 44 24 10 
RIP: __writel syzkaller/managers/linux-4-14/kernel/./arch/x86/include/asm/io.h:71 [inline] RSP: ffff88805ec271c8
RIP: slow_imageblit syzkaller/managers/linux-4-14/kernel/drivers/video/fbdev/core/cfbimgblt.c:178 [inline] RSP: ffff88805ec271c8
RIP: cfb_imageblit+0xa30/0xe40 syzkaller/managers/linux-4-14/kernel/drivers/video/fbdev/core/cfbimgblt.c:302 RSP: ffff88805ec271c8
CR2: ffff888001000180
---[ end trace 96068a9e35580492 ]---