netlink socket correct check (#15720)

2020-05-07 09:55:31 +02:00
parent f5b7d681c7
commit 48a3b5c6db
1 changed files with 1 additions and 1 deletions
@@ -283,7 +283,7 @@ static int socket_recv_message(int fd, struct iovec *iov, uint32_t *ret_mcast_gr
                struct cmsghdr *cmsg;

                cmsg = cmsg_find(&msg, SOL_NETLINK, NETLINK_PKTINFO, CMSG_LEN(sizeof(struct nl_pktinfo)));
-                if (ret_mcast_group)
+                if (cmsg)
                        *ret_mcast_group = ((struct nl_pktinfo*) CMSG_DATA(cmsg))->group;
                else
                        *ret_mcast_group = 0;