Commit 5ef5d6c5 authored by Dan Carpenter's avatar Dan Carpenter Committed by David S. Miller
Browse files

gre: information leak in ip6_tnl_ioctl() 



There is a one byte hole between p->hop_limit and p->flowinfo where
stack memory is leaked to the user.  This was introduced in c12b395a
"gre: Support GRE over IPv6".

Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
parent 56892261

net/ipv6/ip6_tunnel.c

+2 −0
Original line number Diff line number Diff line
@@ -1312,6 +1312,8 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 
			}

			ip6_tnl_parm_from_user(&p1, &p);

			t = ip6_tnl_locate(net, &p1, 0);

		} else {

			memset(&p, 0, sizeof(p));

		}

		if (t == NULL)

			t = netdev_priv(dev);