diff options
| author | Eric Dumazet <edumazet@google.com> | 2018-04-05 16:39:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-12 13:31:19 +0300 |
| commit | 34eb1263d97f0ae0dcdcfe471f44b60c751b5091 (patch) | |
| tree | fdff25753a398f2ec930b28cba0473944b65c717 /net/ipv6 | |
| parent | 4fba1a669a9abaed5992c1cf5b3eac7b5ee84f2d (diff) | |
| download | linux-34eb1263d97f0ae0dcdcfe471f44b60c751b5091.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/ipv6')
| -rw-r--r-- | net/ipv6/ip6_vti.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c index 8c184f84f353..15c51686e076 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) |