summaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorEric Dumazet <edumazet@google.com>2018-04-05 16:39:31 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-04-13 20:48:35 +0300
commitdbb6ed68192765066bf16067d76ec699c87d42f0 (patch)
treee99f98f280d831637832e9ec4e82648e953f7889 /net
parent92b2828c7c361ce44f8b01c2268265478841c586 (diff)
downloadlinux-dbb6ed68192765066bf16067d76ec699c87d42f0.tar.xz
vti6: better validate user provided tunnel names
[ Upstream commit 537b361fbcbcc3cd6fe2bb47069fd292b9256d16 ] Use valid_name() to make sure user does not provide illegal device name. Fixes: ed1efb2aefbb ("ipv6: Add support for IPsec virtual tunnel interfaces") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/ip6_vti.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c
index 912333586de6..beae93fd66d5 100644
--- a/net/ipv6/ip6_vti.c
+++ b/net/ipv6/ip6_vti.c
@@ -212,10 +212,13 @@ static struct ip6_tnl *vti6_tnl_create(struct net *net, struct __ip6_tnl_parm *p
char name[IFNAMSIZ];
int err;
- 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, "ip6_vti%%d");
+ }
dev = alloc_netdev(sizeof(*t), name, NET_NAME_UNKNOWN, vti6_dev_setup);
if (!dev)