NULL pointer security context

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5684 818b1a75-f10b-46b9-bf7c-635c3b92a50f

openair-cn/NAS/EURECOM-NAS/src/api/network/nas_message.c

@@ -278,18 +278,19 @@ int nas_message_decrypt(
         LOG_FUNC_RETURN (TLV_DECODE_BUFFER_TOO_SHORT);
     }
     else if (size > 1) {
+        if (emm_security_context) {
 #if defined(NAS_MME)
             if (emm_security_context->ul_count.seq_num > header->sequence_number) {
                 emm_security_context->ul_count.overflow += 1;
             }
             emm_security_context->ul_count.seq_num = header->sequence_number;
-
 #else
             if (emm_security_context->dl_count.seq_num > header->sequence_number) {
                 emm_security_context->dl_count.overflow += 1;
             }
             emm_security_context->dl_count.seq_num = header->sequence_number;
 #endif
+        }
         /* Compute offset of the sequence number field */
         int offset = size - sizeof(UInt8_t);
         /* Compute the NAS message authentication code */
@@ -946,8 +947,8 @@ static int _nas_message_decrypt(
     case SECURITY_HEADER_TYPE_INTEGRITY_PROTECTED:
     case SECURITY_HEADER_TYPE_INTEGRITY_PROTECTED_NEW:
         LOG_TRACE(DEBUG,
-                "No decryption of message according to security header type 0x%02x",
-                security_header_type);
+                "No decryption of message length %u according to security header type 0x%02x",
+                length, security_header_type);
         memcpy(dest, src, length);
         LOG_FUNC_RETURN (length);
         break;