BUG: unable to handle kernel paging request at ffff888001000120 IP: __writel arch/x86/include/asm/io.h:71 [inline] IP: slow_imageblit drivers/video/fbdev/core/cfbimgblt.c:178 [inline] IP: cfb_imageblit+0xa30/0xe40 drivers/video/fbdev/core/cfbimgblt.c:302 PGD c9c6067 P4D c9c6067 PUD c9c7067 PMD 80000000010001e1 Oops: 0003 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 16353 Comm: syz-executor.1 Not tainted 4.14.217-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a5f44500 task.stack: ffff88805cf10000 RIP: 0010:__writel arch/x86/include/asm/io.h:71 [inline] RIP: 0010:slow_imageblit drivers/video/fbdev/core/cfbimgblt.c:178 [inline] RIP: 0010:cfb_imageblit+0xa30/0xe40 drivers/video/fbdev/core/cfbimgblt.c:302 RSP: 0018:ffff88805cf171c8 EFLAGS: 00010246 RAX: ffff888001000124 RBX: 000000000000001c RCX: ffffc90005eef000 RDX: 0000000000040000 RSI: ffff888001000120 RDI: dffffc0000000000 RBP: 0000000000000000 R08: 00000000000002d3 R09: 0000000000000000 R10: 0000000000000018 R11: 0000000000000000 R12: ffff8880b0b04860 R13: 0000000000000000 R14: 00000000000000b8 R15: 0000000000000000 FS: 00007fe23fc19700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888001000120 CR3: 00000000a36eb000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1208 [inline] vga16fb_imageblit+0x630/0x2140 drivers/video/fbdev/vga16fb.c:1261 bit_putcs_unaligned drivers/video/fbdev/core/bitblit.c:139 [inline] bit_putcs+0x81e/0xc30 drivers/video/fbdev/core/bitblit.c:188 fbcon_putcs+0x2fe/0x480 drivers/video/fbdev/core/fbcon.c:1247 con_flush drivers/tty/vt/vt.c:2206 [inline] do_con_write+0xaf6/0x19b0 drivers/tty/vt/vt.c:2456 con_write+0x21/0xa0 drivers/tty/vt/vt.c:2805 process_output_block drivers/tty/n_tty.c:595 [inline] n_tty_write+0x352/0xda0 drivers/tty/n_tty.c:2333 do_tty_write drivers/tty/tty_io.c:959 [inline] tty_write+0x410/0x740 drivers/tty/tty_io.c:1043 __vfs_write+0xe4/0x630 fs/read_write.c:480 __kernel_write+0xf5/0x330 fs/read_write.c:501 write_pipe_buf+0x143/0x1c0 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x326/0x7a0 fs/splice.c:626 splice_from_pipe fs/splice.c:661 [inline] default_file_splice_write+0xc5/0x150 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1018 splice_direct_to_actor+0x27c/0x730 fs/splice.c:973 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007fe23fc19188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000a808 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffef4e5b1ff R14: 00007fe23fc19300 R15: 0000000000022000 Code: 45 7c 24 20 e8 a2 e6 1c fe 89 d9 44 89 f8 d3 e0 41 09 c5 39 5c 24 08 0f 87 76 ff ff ff e8 89 e6 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 arch/x86/include/asm/io.h:71 [inline] RSP: ffff88805cf171c8 RIP: slow_imageblit drivers/video/fbdev/core/cfbimgblt.c:178 [inline] RSP: ffff88805cf171c8 RIP: cfb_imageblit+0xa30/0xe40 drivers/video/fbdev/core/cfbimgblt.c:302 RSP: ffff88805cf171c8 CR2: ffff888001000120 ---[ end trace e095ad34c06b7ccb ]---