Segmentation fault when initialization array
typedef struct {
    char *s;
    int len;
} string_t;


typedef struct {
    uint32_t                numb;
} msg_t;

void myfunct()
{
msg_t msg;
memset(&msg, 0, sizeof(msg));
msg.numb = 1;
char *ClientSendBuf[sizeof(msg)];
string_t buffer = {ClientSendBuf[sizeof(msg)],strlen(ClientSendBuf[sizeof(msg)])};
}

void myfunct()
{
   msg_t msg;
   memset(&msg, 0, sizeof(msg));
   msg.numb = 1;
   char ClientSendBuf[] = "This is my message";

   string_t buffer = {
                     strdup(ClientSendBuf), /*Can return NULL so add error check*/
                     strlen(ClientSendBuf)
   };
    /** Or **/
    string_t buffer;
    buffer.s = malloc(strlen(ClientSendBuf)+1);
    if(NULL == buffer.s)
    {
      /* Memory allocation failed. Handle error.*/
    }
    /* Zero fill */
    memset(buffer.s, 0, strlen(ClientSendBuf)+1);
    strcpy(buffer.s, ClientSendBuf);
    buffer.len = strlen(ClientSendBuf);
     /*Opeartions with buffer*/
     /*Call free in both cases !*/
     free(buffer.s);
}

char *ClientSendBuff[sizeof(msg)];
string_t buffer[sizeof(msg)];
int i;

for(i = 0; i < sizeof(msg); i++) {
    ClientSendBuff[i] = malloc(100); // you have to initialize (and free when
    buffer[i].s = ClientSendBuff[i]; // you don't need them anymore) every pointer
    buffer[i].len = 100;
}