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Commit db7a65e3 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

ip6_tunnel: better validate user provided tunnel names 



Use valid_name() to make sure user does not provide illegal
device name.

Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5f42df01

net/ipv6/ip6_tunnel.c

+7 −4
Original line number Diff line number Diff line
@@ -297,13 +297,16 @@ static struct ip6_tnl *ip6_tnl_create(struct net *net, struct __ip6_tnl_parm *p) 
	struct net_device *dev;

	struct ip6_tnl *t;

	char name[IFNAMSIZ];

	int err = -ENOMEM;

	int err = -E2BIG;



	if (p->name[0])

	if (p->name[0]) {

		if (!dev_valid_name(p->name))

			goto failed;

		strlcpy(name, p->name, IFNAMSIZ);

	else

	} else {

		sprintf(name, "ip6tnl%%d");



	}

	err = -ENOMEM;

	dev = alloc_netdev(sizeof(*t), name, NET_NAME_UNKNOWN,

			   ip6_tnl_dev_setup);

	if (!dev)