From: Pieter Jansen van Vuuren <[email protected]>
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 <[email protected]>
Signed-off-by: Pieter Jansen van Vuuren <[email protected]>
---
drivers/net/ethernet/netronome/nfp/flower/action.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/netronome/nfp/flower/action.c
b/drivers/net/ethernet/netronome/nfp/flower/action.c
index db9750695dc7..8ea9320014ee 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)
--
2.14.1
