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Commit 2475f59c authored by Peter Oskolkov's avatar Peter Oskolkov Committed by David S. Miller
Browse files

ipv6: discard IP frag queue on more errors 



This is similar to how ipv4 now behaves:
commit 0ff89efb ("ip: fail fast on IP defrag errors").

Signed-off-by: default avatarPeter Oskolkov <posk@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 075e264f

net/ipv6/reassembly.c

+6 −5
Original line number Diff line number Diff line
@@ -145,7 +145,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb, 
		 */

		if (end < fq->q.len ||

		    ((fq->q.flags & INET_FRAG_LAST_IN) && end != fq->q.len))

			goto err;

			goto discard_fq;

		fq->q.flags |= INET_FRAG_LAST_IN;

		fq->q.len = end;

	} else {
@@ -162,20 +162,20 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb, 
		if (end > fq->q.len) {

			/* Some bits beyond end -> corruption. */

			if (fq->q.flags & INET_FRAG_LAST_IN)

				goto err;

				goto discard_fq;

			fq->q.len = end;

		}

	}



	if (end == offset)

		goto err;

		goto discard_fq;



	/* Point into the IP datagram 'data' part. */

	if (!pskb_pull(skb, (u8 *) (fhdr + 1) - skb->data))

		goto err;

		goto discard_fq;



	if (pskb_trim_rcsum(skb, end - offset))

		goto err;

		goto discard_fq;



	/* Find out which fragments are in front and at the back of us

	 * in the chain of fragments so far.  We must know where to put
@@ -418,6 +418,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev, 
	rcu_read_lock();

	__IP6_INC_STATS(net, __in6_dev_get(dev), IPSTATS_MIB_REASMFAILS);

	rcu_read_unlock();

	inet_frag_kill(&fq->q);

	return -1;

}