netrom: Fix nr_getname() leak
Eric Dumazet [Thu, 6 Aug 2009 03:31:07 +0000 (03:31 +0000)]
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>

net/netrom/af_netrom.c

index ce51ce0..ce1a34b 100644 (file)
@@ -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 {