Fixes coverity 359677

lib/src/common/liblte_security.cc

@@ -428,7 +428,6 @@ LIBLTE_ERROR_ENUM liblte_security_generate_k_nr_up(uint8*
 
 LIBLTE_ERROR_ENUM liblte_security_generate_sk_gnb(uint8_t* k_enb, uint8_t* sk_gnb, uint16_t scg_counter)
 {
-
   LIBLTE_ERROR_ENUM err = LIBLTE_ERROR_INVALID_INPUTS;
   uint8             s[5];
 
@@ -627,7 +626,10 @@ LIBLTE_ERROR_ENUM liblte_security_128_eia2(const uint8*           key,
                                            LIBLTE_BIT_MSG_STRUCT* msg,
                                            uint8*                 mac)
 {
-  LIBLTE_ERROR_ENUM err = LIBLTE_ERROR_INVALID_INPUTS;
+  if (!key || !msg || !mac) {
+    return LIBLTE_ERROR_INVALID_INPUTS;
+  }
+
   uint8       M[msg->N_bits * 8 + 8 + 16];
   aes_context ctx;
   uint32      i;
@@ -641,7 +643,6 @@ LIBLTE_ERROR_ENUM liblte_security_128_eia2(const uint8*           key,
   uint8       T[16];
   uint8       tmp[16];
 
-  if (key != NULL && msg != NULL && mac != NULL) {
   // Subkey L generation
   aes_setkey_enc(&ctx, key, 128);
   aes_crypt_ecb(&ctx, AES_ENCRYPT, const_zero, L);
@@ -714,10 +715,7 @@ LIBLTE_ERROR_ENUM liblte_security_128_eia2(const uint8*           key,
     mac[i] = T[i];
   }
 
-    err = LIBLTE_SUCCESS;
+  return LIBLTE_SUCCESS;
-  }
-
-  return (err);
 }
 
 uint32_t GET_WORD(uint32_t* DATA, uint32_t i)