Function msg_free

CVE-2021-4154/exploit/exploit-ROP.c:274–277

}

void msg_free(int msqid, int msg_type, char *data, size_t size) {
  if (msgrcv(msqid, data, size, msg_type, 0) < 0)
    perror("msgrcv");
}

void vsleep(int n) {
  while (n--) {