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gre: information leak in ip6_tnl_ioctl()

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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>
This commit is contained in:
Dan Carpenter 2012-08-16 03:14:04 +00:00 committed by David S. Miller
parent 56892261ed
commit 5ef5d6c569
1 changed files with 2 additions and 0 deletions
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2
net/ipv6/ip6_tunnel.c
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@ -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);