netdev - [PATCH] selftests: net: forwarding: cleanup veth peers created via NUM

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Message-ID: <20260120230905.328528-1-aleksey.oladko@virtuozzo.com>
Date: Tue, 20 Jan 2026 23:09:05 +0000
From: Aleksei Oladko <aleksey.oladko@...tuozzo.com>
To: "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>,
        Shuah Khan <shuah@...nel.org>, Petr Machata <petrm@...dia.com>
Cc: netdev@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Aleksei Oladko <aleksey.oladko@...tuozzo.com>
Subject: [PATCH] selftests: net: forwarding: cleanup veth peers created via NUM_NETIFS

Some net/forwarding kselftests set NUM_NETIFS, causing lib.sh to create
the requested number of veth peer interfaces.

These interfaces are not removed when the tests finish, leaving stale
veth devices in the system. This can cause subsequent tests to fail,
for example min_max_mtu.sh.

Ensure that veth peers created via NUM_NETIFS are properly removed at
the end of the tests to avoid interference between test runs.

Signed-off-by: Aleksei Oladko <aleksey.oladko@...tuozzo.com>
---
 tools/testing/selftests/net/forwarding/lib.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index a9034f0bb58b..ae7699c0c7e5 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -597,6 +597,10 @@ vrf_cleanup()
 	ip -6 rule del pref 32765
 	ip -4 rule add pref 0 table local
 	ip -4 rule del pref 32765
+
+	for ((i = 1; i <= NUM_NETIFS; i=$i+2)); do
+		ip link delete dev ${NETIFS[p$i]} 2>/dev/null || true
+	done
 }
 
 adf_vrf_prepare()
-- 
2.43.0