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Index: sys/netinet/tcp_sack.c
===================================================================
--- sys/netinet/tcp_sack.c
+++ sys/netinet/tcp_sack.c
@@ -965,6 +965,15 @@
}
}
out:
+ KASSERT(SEQ_LT(hole->start, hole->end), ("%s: hole.start >= hole.end", __func__));
+ KASSERT(SEQ_LT(hole->start, tp->snd_fack), ("%s: hole.start >= snd.fack", __func__));
+ KASSERT(SEQ_LT(hole->end, tp->snd_fack), ("%s: hole.end >= snd.fack", __func__));
+ KASSERT(SEQ_LT(hole->rxmit, tp->snd_fack), ("%s: hole.rxmit >= snd.fack", __func__));
+ if (SEQ_GEQ(hole->start, hole->end) ||
+ SEQ_GEQ(hole->start, tp->snd_fack) ||
+ SEQ_GEQ(hole->end, tp->snd_fack) ||
+ SEQ_GEQ(hole->rxmit, tp->snd_fack))
+ return (NULL);
return (hole);
}

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