Commit 8f182b49 authored by Stephen Hemminger's avatar Stephen Hemminger Committed by David S. Miller
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[LLC]: allow applications to get copy of kernel datagrams

It is legal for an application to bind to a SAP that is also being
used by the kernel. This happens if the bridge module binds to the
STP SAP, and the user wants to have a daemon for STP as well.
It is possible to have kernel doing STP on one bridge, but
let application do RSTP on another bridge.
Signed-off-by: default avatarStephen Hemminger <>
Signed-off-by: default avatarDavid S. Miller <>
parent 23dbe791
......@@ -173,8 +173,10 @@ int llc_rcv(struct sk_buff *skb, struct net_device *dev,
rcv = rcu_dereference(sap->rcv_func);
if (rcv) {
struct sk_buff *cskb = skb_clone(skb, GFP_ATOMIC);
if (cskb)
rcv(cskb, dev, pt, orig_dev);
rcv(skb, dev, pt, orig_dev);
goto out_put;
dest = llc_pdu_type(skb);
if (unlikely(!dest || !llc_type_handlers[dest - 1]))
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