iucv: prevent information leak in iucv_message

Initialize storage for the future IUCV header that will be included
in the transmitted packet. Some of the header fields are unused with
HiperSockets transport, and will contain data left from some other
functions.

Signed-off-by: Eugene Crosser <Eugene.Crosser@ru.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Reviewed-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index 3ea4c98d94dcee8ae8d1ba826c9046cecce1bca2..5bc473b01a00f8a4d42b2268daa9e804e9ab641a 100644 (file)
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -1031,7 +1031,7 @@ static int iucv_sock_sendmsg(struct socket *sock, struct msghdr *msg,
        struct sock *sk = sock->sk;
        struct iucv_sock *iucv = iucv_sk(sk);
        struct sk_buff *skb;
-       struct iucv_message txmsg;
+       struct iucv_message txmsg = {0};
        struct cmsghdr *cmsg;
        int cmsg_done;
        long timeo;