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authorAlexander Duyck <aduyck@mirantis.com>2016-02-09 06:14:43 -0800
committerDavid S. Miller <davem@davemloft.net>2016-02-16 15:25:01 -0500
commit78565208d73ca9b654fb9a6b142214d52eeedfd1 (patch)
tree1d7052b654fea42b5f494aeb28626af457a2e9fb
parent7b4c534ed43c6c132e507142b3edaa5256f08f53 (diff)
downloadtalos-op-linux-78565208d73ca9b654fb9a6b142214d52eeedfd1.tar.gz
talos-op-linux-78565208d73ca9b654fb9a6b142214d52eeedfd1.zip
net: Copy inner L3 and L4 headers as unaligned on GRE TEB
This patch corrects the unaligned accesses seen on GRE TEB tunnels when generating hash keys. Specifically what this patch does is make it so that we force the use of skb_copy_bits when the GRE inner headers will be unaligned due to NET_IP_ALIGNED being a non-zero value. Signed-off-by: Alexander Duyck <aduyck@mirantis.com> Acked-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/core/flow_dissector.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index eab81bc80e5c..12e700332010 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -399,6 +399,13 @@ ip_proto_again:
goto out_bad;
proto = eth->h_proto;
nhoff += sizeof(*eth);
+
+ /* Cap headers that we access via pointers at the
+ * end of the Ethernet header as our maximum alignment
+ * at that point is only 2 bytes.
+ */
+ if (NET_IP_ALIGN)
+ hlen = nhoff;
}
key_control->flags |= FLOW_DIS_ENCAPSULATION;
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