vt: fix broken display when running aptitude
authorMikulas Patocka <mpatocka@redhat.com>
Tue, 23 Oct 2018 15:28:28 +0000 (11:28 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 8 Nov 2018 11:36:40 +0000 (03:36 -0800)
If you run aptitude on framebuffer console, the display is corrupted. The
corruption is caused by the commit d8ae7242. The patch adds "offset" to
"start" when calling scr_memsetw, but it forgets to do the same addition
on a subsequent call to do_update_region.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Fixes: d8ae72427187 ("vt: preserve unicode values corresponding to screen characters")
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Cc: stable@vger.kernel.org # 4.19
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/vt/vt.c

index 5f1183b0b89df3bc672ccf7299dc103dfddbf138..476ec4b1b86cd09e4dab5875fa4ede7801d9a294 100644 (file)
@@ -1551,7 +1551,7 @@ static void csi_K(struct vc_data *vc, int vpar)
        scr_memsetw(start + offset, vc->vc_video_erase_char, 2 * count);
        vc->vc_need_wrap = 0;
        if (con_should_update(vc))
-               do_update_region(vc, (unsigned long) start, count);
+               do_update_region(vc, (unsigned long)(start + offset), count);
 }
 
 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */