Fix one uninitialized and one incorrectly initialized arguments in sendmsg sy...

src/trusted/desc/posix/nacl_desc_conn_cap.c

 /*
  * Copyright 2010  The Native Client Authors.  All rights reserved.
  * Use of this source code is governed by a BSD-style license that can
  * be found in the LICENSE file.
  */
 
 /*
  * NaCl Service Runtime.  I/O Descriptor / Handle abstraction.
  * Connection capabilities.
  */
@@ skipping 82 matching lines @@
   }
 
   iovec.iov_base = "c";
   iovec.iov_len = 1;
   connect_msg.msg_iov = &iovec;
   connect_msg.msg_iovlen = 1;
   connect_msg.msg_name = NULL;
   connect_msg.msg_namelen = 0;
   connect_msg.msg_control = control_buf;
   connect_msg.msg_controllen = sizeof(control_buf);
+  connect_msg.msg_flags = 0;
 
   cmsg = CMSG_FIRSTHDR(&connect_msg);
   cmsg->cmsg_len = CMSG_LEN(sizeof(int));
   cmsg->cmsg_level = SOL_SOCKET;
   cmsg->cmsg_type = SCM_RIGHTS;
   /* We use memcpy() rather than assignment through a cast to avoid
      strict-aliasing warnings */
   memcpy(CMSG_DATA(cmsg), &sock_pair[0], sizeof(int));
+  /* Set msg_controllen to the actual size of the cmsg. */
+  connect_msg.msg_controllen = cmsg->cmsg_len;
 
   sent = sendmsg(self->connect_fd, &connect_msg, 0);
   NaClClose(sock_pair[0]);
   if (sent != 1) {
     NaClClose(sock_pair[1]);
     return -NACL_ABI_EIO;
   }
 
   connected_socket = malloc(sizeof(*connected_socket));
   if (connected_socket == NULL ||
@@ skipping 61 matching lines @@
   if (!NaClDescCtor(&conn_cap->base)) {
     free(conn_cap);
     return -NACL_ABI_ENOMEM;
   }
   conn_cap->base.vtbl = &kNaClDescConnCapFdVtbl;
   conn_cap->connect_fd = *xfer->next_handle;
   *xfer->next_handle++ = NACL_INVALID_HANDLE;
   *result = &conn_cap->base;
   return 0;
 }