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authorDan Carpenter <dan.carpenter@oracle.com>2012-08-16 03:14:04 +0000
committerDavid S. Miller <davem@davemloft.net>2012-08-20 02:21:30 -0700
commit5ef5d6c569f80cf716d75fa88e9b5ee72f0986b2 (patch)
treed8d85f656645a41afa15ff5ac11cf4e5eddf841f /net/ipv6
parent56892261ed1a854db5363df8bb3fbdb2c6c28d4c (diff)
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 c12b395a46 "gre: Support GRE over IPv6". Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/ip6_tunnel.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 33d2a0e6712..cb7e2ded6f0 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -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);