void ass_stripe_pack_c(uint8_t *dst, ptrdiff_t dst_stride, const int16_t *src,
                       uintptr_t width, uintptr_t height)
{
    for (uintptr_t x = 0; x < width; x += STRIPE_WIDTH) {
        uint8_t *ptr = dst;
        for (uintptr_t y = 0; y < height; ++y) {
            const int16_t *dither = dither_line + (y & 1) * STRIPE_WIDTH;
            for (int k = 0; k < STRIPE_WIDTH; ++k)
                ptr[k] = (uint16_t)(src[k] - (src[k] >> 8) + dither[k]) >> 6;
            ptr += dst_stride;
            src += STRIPE_WIDTH;
        }
        dst += STRIPE_WIDTH;
    }
    uintptr_t left = dst_stride - ((width + STRIPE_MASK) & ~STRIPE_MASK);
    for (uintptr_t y = 0; y < height; ++y) {
        for (uintptr_t x = 0; x < left; ++x)
            dst[x] = 0;
        dst += dst_stride;
    }
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.