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Eli Cooper authored
commit 23f4ffed upstream. skb->cb may contain data from previous layers. In the observed scenario, the garbage data were misinterpreted as IP6CB(skb)->frag_max_size, so that small packets sent through the tunnel are mistakenly fragmented. This patch unconditionally clears the control buffer in ip6tunnel_xmit(), which affects ip6_tunnel, ip6_udp_tunnel and ip6_gre. Currently none of these tunnels set IP6CB(skb)->flags, otherwise it needs to be done earlier. Cc: stable@vger.kernel.org Signed-off-by:
Eli Cooper <elicooper@gmx.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Willy Tarreau <w@1wt.eu>
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