On 25.09.24 16:34, Sascha Hauer wrote: > Do not render the parts of the image that are outside the screen > boundaries to prevent memory corruptions. > > Signed-off-by: Sascha Hauer <[email protected]>
Reviewed-by: Ahmad Fatoum <[email protected]> > --- > lib/gui/graphic_utils.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/lib/gui/graphic_utils.c b/lib/gui/graphic_utils.c > index d91a7f3550..93ef1214f9 100644 > --- a/lib/gui/graphic_utils.c > +++ b/lib/gui/graphic_utils.c > @@ -229,6 +229,9 @@ void gu_rgba_blend(struct fb_info *info, struct image > *img, void* buf, int heigh > line_length = info->line_length; > > for (y = 0; y < height; y++) { > + if (y + starty >= info->yres) > + break; > + > adr = buf + (y + starty) * line_length + > startx * (info->bits_per_pixel >> 3); > image = img->data + (y * img->width *img_byte_per_pixel); > @@ -236,6 +239,9 @@ void gu_rgba_blend(struct fb_info *info, struct image > *img, void* buf, int heigh > for (x = 0; x < width; x++) { > uint8_t *pixel = image; > > + if (x + startx >= info->xres) > + break; > + > if (is_rgba) > gu_set_rgba_pixel(info, adr, pixel[0], pixel[1], > pixel[2], pixel[3]); > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
