From: Alexander Duyck <aduyck@xxxxxxxxxxxx> This patch has been added to the 4.1 stable tree. If you have any objections, please let us know. =============== [ Upstream commit 78565208d73ca9b654fb9a6b142214d52eeedfd1 ] 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@xxxxxxxxxxxx> Acked-by: Tom Herbert <tom@xxxxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx> --- net/core/flow_dissector.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index f96d2ca..3556791 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -233,6 +233,13 @@ ipv6: return false; 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; } goto again; } -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html