ip6_gre: fix endianness errors in ip6gre_err
info is in network byte order, change it back to host byte order before use. In particular, the current code sets the MTU of the tunnel to a wrong (too big) value. Fixes: c12b395a ("gre: Support GRE over IPv6") Signed-off-by: NSabrina Dubroca <sd@queasysnail.net> Acked-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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