BUG: unable to handle kernel paging request at ffff888001000018 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 c9de067 P4D c9de067 PUD c9df067 PMD 80000000010001e1 Oops: 0003 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 15632 Comm: syz-executor.2 Not tainted 4.14.264-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880554b0300 task.stack: ffff8880a0790000 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:ffff8880a07972d8 EFLAGS: 00010246 RAX: ffff88800100001c RBX: 000000000000001c RCX: ffffc90006ee1000 RDX: 0000000000040000 RSI: ffff888001000018 RDI: dffffc0000000000 RBP: 0000000000000000 R08: ffff88823883123f R09: 0000000000000000 R10: ffff8880554b0c28 R11: 0000000000000000 R12: ffff88823883123d R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fd5a90ae700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888001000018 CR3: 0000000097561000 CR4: 00000000003406e0 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 soft_cursor+0x50a/0xa50 drivers/video/fbdev/core/softcursor.c:74 bit_cursor+0xf7a/0x1580 drivers/video/fbdev/core/bitblit.c:377 fbcon_cursor+0x48e/0x650 drivers/video/fbdev/core/fbcon.c:1290 set_cursor drivers/tty/vt/vt.c:603 [inline] set_cursor+0x189/0x1e0 drivers/tty/vt/vt.c:594 con_flush_chars drivers/tty/vt/vt.c:2902 [inline] con_flush_chars drivers/tty/vt/vt.c:2891 [inline] con_write+0x81/0xa0 drivers/tty/vt/vt.c:2823 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: 0033:0x7fd5aa739059 RSP: 002b:00007fd5a90ae168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fd5aa84bf60 RCX: 00007fd5aa739059 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000004 RBP: 00007fd5aa79308d R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000a808 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc5c4291bf R14: 00007fd5a90ae300 R15: 0000000000022000 Code: 45 7c 24 20 e8 02 57 1b fe 89 d9 44 89 f8 d3 e0 41 09 c5 39 5c 24 08 0f 87 76 ff ff ff e8 e9 56 1b 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: ffff8880a07972d8 RIP: slow_imageblit drivers/video/fbdev/core/cfbimgblt.c:178 [inline] RSP: ffff8880a07972d8 RIP: cfb_imageblit+0xa30/0xe40 drivers/video/fbdev/core/cfbimgblt.c:302 RSP: ffff8880a07972d8 CR2: ffff888001000018 ---[ end trace c8b0b069e0f6a727 ]--- ---------------- Code disassembly (best guess): 0: 45 7c 24 rex.RB jl 0x27 3: 20 e8 and %ch,%al 5: 02 57 1b add 0x1b(%rdi),%dl 8: fe 89 d9 44 89 f8 decb -0x776bb27(%rcx) e: d3 e0 shl %cl,%eax 10: 41 09 c5 or %eax,%r13d 13: 39 5c 24 08 cmp %ebx,0x8(%rsp) 17: 0f 87 76 ff ff ff ja 0xffffff93 1d: e8 e9 56 1b fe callq 0xfe1b570b 22: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 27: 48 8d 46 04 lea 0x4(%rsi),%rax * 2b: 44 89 2e mov %r13d,(%rsi) <-- trapping instruction 2e: 39 5c 24 08 cmp %ebx,0x8(%rsp) 32: 0f 85 44 ff ff ff jne 0xffffff7c 38: 45 31 ed xor %r13d,%r13d 3b: 48 89 44 24 10 mov %rax,0x10(%rsp)