Regression tests for the shared-block NULL derefs fixed in the previous
two patches:
  - fw: attach an empty fw filter to a shared block and send traffic.
  - flow: create a flow filter on a shared block without a baseclass.

Signed-off-by: Xiang Mei <xmei5@asu.edu>
---
 .../tc-testing/tc-tests/infra/filter.json     | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/tools/testing/selftests/tc-testing/tc-tests/infra/filter.json b/tools/testing/selftests/tc-testing/tc-tests/infra/filter.json
index 8d10042b489b..b749087d1691 100644
--- a/tools/testing/selftests/tc-testing/tc-tests/infra/filter.json
+++ b/tools/testing/selftests/tc-testing/tc-tests/infra/filter.json
@@ -22,5 +22,50 @@
         "teardown": [
             "$TC qdisc del dev $DUMMY root handle 1: htb default 1"
         ]
+    },
+    {
+        "id": "b7e3",
+        "name": "Empty fw filter on shared block - no NULL deref in fw_classify",
+        "category": [
+            "filter",
+            "fw"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$TC qdisc add dev $DEV1 ingress_block 1 clsact",
+            "$TC filter add block 1 protocol ip prio 1 fw"
+        ],
+        "cmdUnderTest": "$IP addr add 10.10.10.1/24 dev $DEV1 && ping -I$DEV1 -c1 -W1 10.10.10.1 || true",
+        "expExitCode": "0",
+        "verifyCmd": "$TC qdisc show dev $DEV1",
+        "matchPattern": "clsact",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DEV1 clsact"
+        ]
+    },
+    {
+        "id": "c8f4",
+        "name": "Flow filter on shared block without baseclass - no NULL deref in flow_change",
+        "category": [
+            "filter",
+            "flow"
+        ],
+        "plugins": {
+            "requires": "nsPlugin"
+        },
+        "setup": [
+            "$TC qdisc add dev $DEV1 ingress_block 1 clsact"
+        ],
+        "cmdUnderTest": "$TC filter add block 1 protocol ip prio 1 handle 1 flow map key dst",
+        "expExitCode": "2",
+        "verifyCmd": "$TC filter show block 1",
+        "matchPattern": "flow",
+        "matchCount": "0",
+        "teardown": [
+            "$TC qdisc del dev $DEV1 clsact"
+        ]
     }
 ]
-- 
2.43.0