netrom: Fix nr_getname() leak

nr_getname() can leak kernel memory to user.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index ce51ce012cdab48e4c0bbfd99c3053a0bfcaa636..ce1a34b99c2328f16648d5cf96cb8ff5edc25ed6 100644 (file)
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -847,6 +847,7 @@ static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
                sax->fsa_ax25.sax25_family = AF_NETROM;
                sax->fsa_ax25.sax25_ndigis = 1;
                sax->fsa_ax25.sax25_call   = nr->user_addr;
+               memset(sax->fsa_digipeater, 0, sizeof(sax->fsa_digipeater));
                sax->fsa_digipeater[0]     = nr->dest_addr;
                *uaddr_len = sizeof(struct full_sockaddr_ax25);
        } else {