From 18c0ab87364ac5128a152055fdcb1d27e01caf01 Mon Sep 17 00:00:00 2001 From: Taehee Yoo Date: Sun, 7 Oct 2018 00:09:32 +0900 Subject: [PATCH] netfilter: xt_TEE: add missing code to get interface index in checkentry. checkentry(tee_tg_check) should initialize priv->oif from dev if possible. But only netdevice notifier handler can set that. Hence priv->oif is always -1 until notifier handler is called. Fixes: 9e2f6c5d78db ("netfilter: Rework xt_TEE netdevice notifier") Signed-off-by: Taehee Yoo Signed-off-by: Pablo Neira Ayuso --- net/netfilter/xt_TEE.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/net/netfilter/xt_TEE.c b/net/netfilter/xt_TEE.c index 673ad2099f97..1dae02a97ee3 100644 --- a/net/netfilter/xt_TEE.c +++ b/net/netfilter/xt_TEE.c @@ -104,6 +104,8 @@ static int tee_tg_check(const struct xt_tgchk_param *par) return -EINVAL; if (info->oif[0]) { + struct net_device *dev; + if (info->oif[sizeof(info->oif)-1] != '\0') return -EINVAL; @@ -115,6 +117,11 @@ static int tee_tg_check(const struct xt_tgchk_param *par) priv->oif = -1; info->priv = priv; + dev = dev_get_by_name(par->net, info->oif); + if (dev) { + priv->oif = dev->ifindex; + dev_put(dev); + } mutex_lock(&tn->lock); list_add(&priv->list, &tn->priv_list); mutex_unlock(&tn->lock);