From 5cba412d6a005719d52dc72b6d7e5a59af979eaa Mon Sep 17 00:00:00 2001 From: Victor Nogueira Date: Wed, 10 Dec 2025 11:22:55 -0500 Subject: [PATCH] selftests/tc-testing: Test case exercising potential mirred redirect deadlock Add a test case that reproduces deadlock scenario where the user has a drr qdisc attached to root and has a mirred action that redirects to self on egress Signed-off-by: Victor Nogueira Acked-by: Jamal Hadi Salim Link: https://patch.msgid.link/20251210162255.1057663-2-jhs@mojatatu.com Signed-off-by: Paolo Abeni --- .../tc-testing/tc-tests/actions/mirred.json | 46 +++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/tools/testing/selftests/tc-testing/tc-tests/actions/mirred.json b/tools/testing/selftests/tc-testing/tc-tests/actions/mirred.json index b73bd255ea36..da156feabcbf 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/actions/mirred.json +++ b/tools/testing/selftests/tc-testing/tc-tests/actions/mirred.json @@ -1052,5 +1052,51 @@ "$TC qdisc del dev $DEV1 ingress_block 21 clsact", "$TC actions flush action mirred" ] + }, + { + "id": "7eba", + "name": "Redirect multiport: dummy egress -> dummy egress (Loop)", + "category": [ + "filter", + "mirred" + ], + "plugins": { + "requires": [ + "nsPlugin" + ] + }, + "setup": [ + "$IP link set dev $DUMMY up || true", + "$IP addr add 10.10.10.10/24 dev $DUMMY || true", + "$TC qdisc add dev $DUMMY handle 1: root drr", + "$TC filter add dev $DUMMY parent 1: protocol ip prio 10 matchall action mirred egress redirect dev $DUMMY index 1" + ], + "cmdUnderTest": "ping -c1 -W0.01 -I $DUMMY 10.10.10.1", + "expExitCode": "1", + "verifyCmd": "$TC -j -s actions get action mirred index 1", + "matchJSON": [ + { + "total acts": 0 + }, + { + "actions": [ + { + "order": 1, + "kind": "mirred", + "mirred_action": "redirect", + "direction": "egress", + "index": 1, + "stats": { + "packets": 1, + "overlimits": 1 + }, + "not_in_hw": true + } + ] + } + ], + "teardown": [ + "$TC qdisc del dev $DUMMY root" + ] } ] -- 2.47.3