void faad_resetbits(bitfile *ld, int bits)
{
    uint32_t tmp;
     int words = bits >> 5;
     int remainder = bits & 0x1F;
 
    if (ld->buffer_size < words * 4)
        ld->bytes_left = 0;
    else
        ld->bytes_left = ld->buffer_size - words*4;
 
     if (ld->bytes_left >= 4)
     {
        tmp = getdword(&ld->start[words]);
        ld->bytes_left -= 4;
    } else {
        tmp = getdword_n(&ld->start[words], ld->bytes_left);
        ld->bytes_left = 0;
    }
    ld->bufa = tmp;

    if (ld->bytes_left >= 4)
    {
        tmp = getdword(&ld->start[words+1]);
        ld->bytes_left -= 4;
    } else {
        tmp = getdword_n(&ld->start[words+1], ld->bytes_left);
        ld->bytes_left = 0;
    }
    ld->bufb = tmp;

    ld->bits_left = 32 - remainder;
    ld->tail = &ld->start[words+2];

    /* recheck for reading too many bytes */
    ld->error = 0;
}

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.