From 239c78db9c41a8f524cce60507440d72229d73bc Mon Sep 17 00:00:00 2001 From: Hannes Frederic Sowa Date: Thu, 5 Dec 2013 23:29:19 +0100 Subject: [PATCH] net: clear local_df when passing skb between namespaces We must clear local_df when passing the skb between namespaces as the packet is not local to the new namespace any more and thus may not get fragmented by local rules. Fred Templin noticed that other namespaces do fragment IPv6 packets while forwarding. Instead they should have send back a PTB. The same problem should be present when forwarding DF-IPv4 packets between namespaces. Reported-by: Templin, Fred L Signed-off-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- net/core/skbuff.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 2718fed53d8c..06e72d3cdf60 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -3584,6 +3584,7 @@ void skb_scrub_packet(struct sk_buff *skb, bool xnet) skb->tstamp.tv64 = 0; skb->pkt_type = PACKET_HOST; skb->skb_iif = 0; + skb->local_df = 0; skb_dst_drop(skb); skb->mark = 0; secpath_reset(skb); -- 2.30.2