ldpc/polar: add casts to avoid possible variable overflow before assignment

lib/src/phy/fec/ldpc/ldpc_dec_c_avx2long_flood.c

@@ -147,7 +147,7 @@ void* create_ldpc_dec_c_avx2long_flood(uint8_t bgN, uint8_t bgM, uint16_t ls, fl
     return NULL;
   }
 
-  if ((vp->check_to_var = srsran_vec_malloc((hrr + 1) * bgM * n_subnodes * sizeof(__m256i))) == NULL) {
+  if ((vp->check_to_var = srsran_vec_malloc((long)(hrr + 1) * bgM * n_subnodes * sizeof(__m256i))) == NULL) {
     free(vp->soft_bits);
     free(vp->llrs);
     free(vp);
@@ -205,7 +205,7 @@ void* create_ldpc_dec_c_avx2long_flood(uint8_t bgN, uint8_t bgM, uint16_t ls, fl
     return NULL;
   }
 
-  if ((vp->rotated_v2c = srsran_vec_malloc((hrr + 1) * n_subnodes * sizeof(__m256i))) == NULL) {
+  if ((vp->rotated_v2c = srsran_vec_malloc((long)(hrr + 1) * n_subnodes * sizeof(__m256i))) == NULL) {
     free(vp->min_ix_epi8);
     free(vp->prod_v2c_epi8);
     free(vp->mins_v2c_epi8);

lib/src/phy/fec/polar/polar_chanalloc.c

@@ -82,7 +82,7 @@ void srsran_polar_chanalloc_rx(const uint8_t*  output_decoder,
   uint16_t i_o = 0;
   uint16_t iPC = 0;
   uint16_t iK  = 0;
-  for (uint16_t iKPC = 0; iKPC < K + nPC; iKPC++) {
+  for (uint16_t iKPC = 0; iKPC < K + (uint16_t)nPC; iKPC++) {
     i_o = K_set[iKPC];        // includes parity bits
     if (i_o == PC_set[iPC]) { // skip
       iPC = iPC + 1;