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Index: sys/netgraph/ng_source.c
===================================================================
--- sys/netgraph/ng_source.c
+++ sys/netgraph/ng_source.c
@@ -567,8 +567,11 @@
}
KASSERT(hook == sc->input, ("%s: no hook!", __func__));
- /* Enqueue packet. */
- /* XXX should we check IF_QFULL() ? */
+ /* Enqueue packet if the queue isn't full. */
+ if (_IF_QFULL(&sc->snd_queue)) {
+ NG_FREE_M(m);
+ return (error);
+ }
_IF_ENQUEUE(&sc->snd_queue, m);
sc->queueOctets += m->m_pkthdr.len;
sc->last_packet = m;

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