This is a note to let you know that I've just added the patch titled
net: clear local_df when passing skb between namespaces
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-clear-local_df-when-passing-skb-between-namespaces.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon Jan 13 09:44:41 PST 2014
From: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 5 Dec 2013 23:29:19 +0100
Subject: net: clear local_df when passing skb between namespaces
From: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx>
[ Upstream commit 239c78db9c41a8f524cce60507440d72229d73bc ]
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 <Fred.L.Templin@xxxxxxxxxx>
Signed-off-by: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/core/skbuff.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -3541,6 +3541,7 @@ void skb_scrub_packet(struct sk_buff *sk
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);
Patches currently in stable-queue which might be from hannes@xxxxxxxxxxxxxxxxxxx are
queue-3.12/ipv6-don-t-count-addrconf-generated-routes-against-gc-limit.patch
queue-3.12/net-clear-local_df-when-passing-skb-between-namespaces.patch
queue-3.12/ipv6-fixed-support-for-blackhole-and-prohibit-routes.patch
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