check_add_overflow
if (check_add_overflow(saddr, size, &tmp)
|| check_add_overflow(offset, size, &tmp)
return check_add_overflow(addr, range, &end);
if (check_add_overflow(mul_u32_u32(height, fb->pitches[color_plane]),
if (check_add_overflow(fb->base.offsets[i], 64, &end)) {