netlink: 80 bytes leftover after parsing attributes in process `syz-executor.3'.
BUG: unable to handle kernel paging request at ffff8880fffffb00
IP: writeb arch/x86/include/asm/io.h:65 [inline]
IP: vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1169 [inline]
IP: vga16fb_imageblit+0x9e4/0x2140 drivers/video/fbdev/vga16fb.c:1261
PGD b08d067 P4D b08d067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 12191 Comm: syz-executor.5 Not tainted 4.14.198-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809a5f4340 task.stack: ffff88804f4c0000
RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline]
RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1169 [inline]
RIP: 0010:vga16fb_imageblit+0x9e4/0x2140 drivers/video/fbdev/vga16fb.c:1261
RSP: 0018:ffff88804f4c7788 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000007 RCX: ffffc90009ebc000
RDX: 0000000000000000 RSI: ffff8880fffffb00 RDI: ffff8880a66ef394
RBP: ffff8880a66ef384 R08: ffff8880a5ba1e8f R09: 0000000000000000
R10: ffffffff83229f70 R11: 0000000000000000 R12: ffff8880a5ae8850
R13: ffff8880a66ef380 R14: ffff8880a5ba1e80 R15: 0000000000000000
FS:  00007f0763486700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880fffffb00 CR3: 000000008d59f000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 soft_cursor+0x50a/0xa50 drivers/video/fbdev/core/softcursor.c:74
 bit_cursor+0x1056/0x1620 drivers/video/fbdev/core/bitblit.c:386
 fbcon_cursor+0x4b1/0x6a0 drivers/video/fbdev/core/fbcon.c:1350
 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:2885 [inline]
 con_flush_chars drivers/tty/vt/vt.c:2874 [inline]
 con_write+0x81/0xa0 drivers/tty/vt/vt.c:2806
 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
 do_loop_readv_writev fs/read_write.c:698 [inline]
 do_loop_readv_writev fs/read_write.c:682 [inline]
 do_iter_write+0x3da/0x550 fs/read_write.c:956
 vfs_writev+0x125/0x290 fs/read_write.c:999
 do_writev+0xfc/0x2c0 fs/read_write.c:1034
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45e179
RSP: 002b:00007f0763485c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 000000000003a680 RCX: 000000000045e179
RDX: 0000000000000001 RSI: 0000000020000100 RDI: 0000000000000004
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffe931cf03f R14: 00007f07634869c0 R15: 000000000118cf4c
Code: df 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 65 28 5e fe 41 8b 45 14 48 8b 74 24 08 <88> 06 0f ae e8 8a 06 b8 05 00 00 00 ba ce 03 00 00 ee 48 c7 c2 
RIP: writeb arch/x86/include/asm/io.h:65 [inline] RSP: ffff88804f4c7788
RIP: vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1169 [inline] RSP: ffff88804f4c7788
RIP: vga16fb_imageblit+0x9e4/0x2140 drivers/video/fbdev/vga16fb.c:1261 RSP: ffff88804f4c7788
CR2: ffff8880fffffb00
---[ end trace 79bdc374fb4df40e ]---