diff options
author | Eric Dumazet <edumazet@google.com> | 2018-04-05 06:39:30 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-12 12:32:25 +0200 |
commit | 109dce20c6ed7c29ac56776381d3daf7dd941374 (patch) | |
tree | 7ed54bbbe0aa1a9db6bdb7143b2b1c0c4819b9e2 /net/ipv6/ip6_tunnel.c | |
parent | 72363c63b0708fb3e8e0ba9fb9e0d405e97153ba (diff) |
ip6_tunnel: better validate user provided tunnel names
[ Upstream commit db7a65e3ab78e5b1c4b17c0870ebee35a4ee3257 ]
Use valid_name() to make sure user does not provide illegal
device name.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv6/ip6_tunnel.c')
-rw-r--r-- | net/ipv6/ip6_tunnel.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 1161fd5630c1..7e11f6a811f5 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -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) |