appletalk: fix atalk_getname() leak

commit 3d392475c873c10c10d6d96b94d092a34ebd4791 upstream.

atalk_getname() can leak 8 bytes of kernel memory to user

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index 0c850427a85b437e4e82e80b6c5f7f5bc52e06d0..8067dc75904be3e361576f49905c75965d89c18c 100644 (file)
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1245,6 +1245,7 @@ static int atalk_getname(struct socket *sock, struct sockaddr *uaddr,
                        return -ENOBUFS;
 
        *uaddr_len = sizeof(struct sockaddr_at);
+       memset(&sat.sat_zero, 0, sizeof(sat.sat_zero));
 
        if (peer) {
                if (sk->sk_state != TCP_ESTABLISHED)