They are required to run the selftests:

 - Tests are executed in v4 and v6.

 - Virtual Ethernet are used between the different netns.

This has not been seen on NIPA before, because the 'ovpn' tests are
executed with the 'tcp_ao' ones, merging their config files. These two
kernel config are present in tools/testing/selftests/net/tcp_ao/config.

This issue is visible when only the ovpn config is used on top of the
default one. This is the recommended way to execute selftest targets.

Fixes: 959bc330a439 ("testing/selftests: add test tool and scripts for ovpn module")
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
---
To: Antonio Quartulli <antonio@openvpn.net>
To: Sabrina Dubroca <sd@queasysnail.net>
---
 tools/testing/selftests/net/ovpn/config | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/net/ovpn/config b/tools/testing/selftests/net/ovpn/config
index d6cf033d555e..6b424762e46e 100644
--- a/tools/testing/selftests/net/ovpn/config
+++ b/tools/testing/selftests/net/ovpn/config

@@ -4,6 +4,7 @@ CONFIG_CRYPTO_CHACHA20POLY1305=y
 CONFIG_CRYPTO_GCM=y
 CONFIG_DST_CACHE=y
 CONFIG_INET=y
+CONFIG_IPV6=y
 CONFIG_NET=y
 CONFIG_NETFILTER=y
 CONFIG_NET_UDP_TUNNEL=y

@@ -11,3 +12,4 @@ CONFIG_NF_TABLES=m
 CONFIG_NF_TABLES_INET=y
 CONFIG_OVPN=m
 CONFIG_STREAM_PARSER=y
+CONFIG_VETH=y

-- 
2.53.0