On 8/23/19 1:51 PM, Alexey Kodanev wrote:
> When using mpls over gre/gre6 setup, rt->rt_gw4 address is not set, the
> same for rt->rt_gw_family. Therefore, when rt->rt_gw_family is checked
> in mpls_xmit(), neigh_xmit() call is skipped. As a result, such setup
> doesn't work anymore.
>
> This issue was found with LTP mpls03 tests.
>
> Fixes: 1550c171935d ("ipv4: Prepare rtable for IPv6 gateway")
> Signed-off-by: Alexey Kodanev <[email protected]>
> ---
> net/mpls/mpls_iptunnel.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
Thanks for the report and patch. On first glance, it seems odd that
neigh_xmit could be called with rt_gw4 (formerly rt_gateway) set to 0
and if it is non-zero, why isn't family set.
I am traveling today and doubt I will be able to take a deep look at
this until Monday.
