vhost: avoid function call in data path

[dpdk.git] / lib / librte_vhost / socket.c

diff --git a/lib/librte_vhost/socket.c b/lib/librte_vhost/socket.c
index 776336c..6ba60f5 100644 (file)
--- a/lib/librte_vhost/socket.c
+++ b/lib/librte_vhost/socket.c
@@ -159,6 +159,11 @@ send_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num)
                msgh.msg_control = control;
                msgh.msg_controllen = sizeof(control);
                cmsg = CMSG_FIRSTHDR(&msgh);
+               if (cmsg == NULL) {
+                       RTE_LOG(ERR, VHOST_CONFIG, "cmsg == NULL\n");
+                       errno = EINVAL;
+                       return -1;
+               }
                cmsg->cmsg_len = CMSG_LEN(fdsize);
                cmsg->cmsg_level = SOL_SOCKET;
                cmsg->cmsg_type = SCM_RIGHTS;