void ih264d_assign_pic_num(dec_struct_t *ps_dec)
{
 dpb_manager_t *ps_dpb_mgr;
 struct dpb_info_t *ps_next_dpb;
    WORD8 i;
    WORD32 i4_cur_frame_num, i4_max_frame_num;
    WORD32 i4_ref_frame_num;
    UWORD8 u1_fld_pic_flag = ps_dec->ps_cur_slice->u1_field_pic_flag;

    i4_max_frame_num = ps_dec->ps_cur_sps->u2_u4_max_pic_num_minus1 + 1;
    i4_cur_frame_num = ps_dec->ps_cur_pic->i4_frame_num;
    ps_dpb_mgr = ps_dec->ps_dpb_mgr;

 /* Start from ST head */
    ps_next_dpb = ps_dpb_mgr->ps_dpb_st_head;
 for(i = 0; i < ps_dpb_mgr->u1_num_st_ref_bufs; i++)
 {
        WORD32 i4_pic_num;

        i4_ref_frame_num = ps_next_dpb->ps_pic_buf->i4_frame_num;
 if(i4_ref_frame_num > i4_cur_frame_num)
 {
 /* RefPic Buf frame_num is before Current frame_num in decode order */
            i4_pic_num = i4_ref_frame_num - i4_max_frame_num;
 }
 else
 {
 /* RefPic Buf frame_num is after Current frame_num in decode order */
            i4_pic_num = i4_ref_frame_num;
 }

        ps_next_dpb->ps_pic_buf->i4_pic_num = i4_pic_num;
        ps_next_dpb->i4_frame_num = i4_pic_num;
        ps_next_dpb->ps_pic_buf->u1_long_term_frm_idx = MAX_REF_BUFS + 1;
 if(u1_fld_pic_flag)
 {
 /* Assign the pic num to top fields and bot fields */

            ps_next_dpb->s_top_field.i4_pic_num = i4_pic_num * 2
 + !(ps_dec->ps_cur_slice->u1_bottom_field_flag);
            ps_next_dpb->s_bot_field.i4_pic_num = i4_pic_num * 2
 + ps_dec->ps_cur_slice->u1_bottom_field_flag;
 }
 /* Chase the next link */
        ps_next_dpb = ps_next_dpb->ps_prev_short;
 }

 if(ps_dec->ps_cur_sps->u1_gaps_in_frame_num_value_allowed_flag
 && ps_dpb_mgr->u1_num_gaps)
 {
        WORD32 i4_start_frm, i4_end_frm;
 /* Assign pic numbers for gaps */
 for(i = 0; i < MAX_FRAMES; i++)
 {
            i4_start_frm = ps_dpb_mgr->ai4_gaps_start_frm_num[i];
 if(i4_start_frm != INVALID_FRAME_NUM)
 {
 if(i4_start_frm > i4_cur_frame_num)
 {
 /* gap's frame_num is before Current frame_num in
                     decode order */
                    i4_start_frm -= i4_max_frame_num;
 }
                ps_dpb_mgr->ai4_gaps_start_frm_num[i] = i4_start_frm;
                i4_end_frm = ps_dpb_mgr->ai4_gaps_end_frm_num[i];

 if(i4_end_frm > i4_cur_frame_num)
 {
 /* gap's frame_num is before Current frame_num in
                     decode order */
                    i4_end_frm -= i4_max_frame_num;
 }
                ps_dpb_mgr->ai4_gaps_end_frm_num[i] = i4_end_frm;
 }
 }
 }
}

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.