[NETFILTER]: nf_queue: handle NF_STOP and unknown verdicts in nf_reinject

In case of an unknown verdict or NF_STOP the packet leaks. Unknown verdicts
can happen when userspace is buggy. Reinject the packet in case of NF_STOP,
drop on unknown verdicts.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c
index bb6fcee..662a869 100644 (file)
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -219,21 +219,20 @@ void nf_reinject(struct sk_buff *skb, struct nf_info *info,
 
        switch (verdict & NF_VERDICT_MASK) {
        case NF_ACCEPT:
+       case NF_STOP:
                info->okfn(skb);
+       case NF_STOLEN:
                break;
-
        case NF_QUEUE:
                if (!nf_queue(&skb, elem, info->pf, info->hook, 
                              info->indev, info->outdev, info->okfn,
                              verdict >> NF_VERDICT_BITS))
                        goto next_hook;
                break;
+       default:
+               kfree_skb(skb);
        }
        rcu_read_unlock();
-
-       if (verdict == NF_DROP)
-               kfree_skb(skb);
-
        kfree(info);
        return;
 }