From: Pieter Jansen van Vuuren Date: Wed, 25 Oct 2017 18:47:05 +0000 (-0700) Subject: nfp: refuse offloading filters that redirects to upper devices X-Git-Tag: v4.14-rc7~1^2~26 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d309ae5c6a00648198d1932e6db483d612c2e260;p=platform%2Fkernel%2Flinux-rpi.git nfp: refuse offloading filters that redirects to upper devices Previously we did not ensure that a netdev is a representative netdev before dereferencing its private data. This can occur when an upper netdev is created on a representative netdev. This patch corrects this by first ensuring that the netdev is a representative netdev before using it. Checking only switchdev_port_same_parent_id is not sufficient to ensure that we can safely use the netdev. Failing to check that the netdev is also a representative netdev would result in incorrect dereferencing. Fixes: 1a1e586f54bf ("nfp: add basic action capabilities to flower offloads") Signed-off-by: Jakub Kicinski Signed-off-by: Pieter Jansen van Vuuren Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/netronome/nfp/flower/action.c b/drivers/net/ethernet/netronome/nfp/flower/action.c index db97506..8ea9320 100644 --- a/drivers/net/ethernet/netronome/nfp/flower/action.c +++ b/drivers/net/ethernet/netronome/nfp/flower/action.c @@ -110,6 +110,8 @@ nfp_fl_output(struct nfp_fl_output *output, const struct tc_action *action, */ if (!switchdev_port_same_parent_id(in_dev, out_dev)) return -EOPNOTSUPP; + if (!nfp_netdev_is_nfp_repr(out_dev)) + return -EOPNOTSUPP; output->port = cpu_to_be32(nfp_repr_get_port_id(out_dev)); if (!output->port)