kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

arkfb: use display information in info not in var for panning

Browse source 
We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2011-05-25 11:34:52 +02:00
parent 2970840c03
commit a35a9b79dd
1 changed files with 5 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
drivers/video/arkfb.c
View file

@ -908,13 +908,14 @@ static int arkfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info
unsigned int offset;
/* Calculate the offset */
if (var->bits_per_pixel == 0) {
offset = (var->yoffset / 16) * (var->xres_virtual / 2) + (var->xoffset / 2);
if (info->var.bits_per_pixel == 0) {
offset = (var->yoffset / 16) * (info->var.xres_virtual / 2)
+ (var->xoffset / 2);
offset = offset >> 2;
} else {
offset = (var->yoffset * info->fix.line_length) +
(var->xoffset * var->bits_per_pixel / 8);
offset = offset >> ((var->bits_per_pixel == 4) ? 2 : 3);
(var->xoffset * info->var.bits_per_pixel / 8);
offset = offset >> ((info->var.bits_per_pixel == 4) ? 2 : 3);
}
/* Set the offset */