Commit 04d4fbca authored by Mathias Krause's avatar Mathias Krause Committed by David S. Miller
Browse files

l2tp: fix info leak via getsockname()

The L2TP code for IPv6 fails to initialize the l2tp_unused member of
struct sockaddr_l2tpip6 and that for leaks two bytes kernel stack via
the getsockname() syscall. Initialize l2tp_unused with 0 to avoid the
info leak.
Signed-off-by: default avatarMathias Krause <>
Cc: James Chapman <>
Signed-off-by: default avatarDavid S. Miller <>
parent 792039c7
......@@ -410,6 +410,7 @@ static int l2tp_ip6_getname(struct socket *sock, struct sockaddr *uaddr,
lsa->l2tp_family = AF_INET6;
lsa->l2tp_flowinfo = 0;
lsa->l2tp_scope_id = 0;
lsa->l2tp_unused = 0;
if (peer) {
if (!lsk->peer_conn_id)
return -ENOTCONN;
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