selftests: add a test case for cls_lower handle overflow

Reported-by: NLi Shuang <shuali@redhat.com>
Signed-off-by: NDavide Caratti <dcaratti@redhat.com>
Signed-off-by: NCong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

tools/testing/selftests/tc-testing/tc-tests/filters/tests.json

@@ -38,6 +38,25 @@
             "$TC qdisc del dev $DEV1 clsact"
         ]
     },
+    {
+        "id": "2ff3",
+        "name": "Add flower with max handle and then dump it",
+        "category": [
+            "filter",
+            "flower"
+        ],
+        "setup": [
+            "$TC qdisc add dev $DEV2 ingress"
+        ],
+        "cmdUnderTest": "$TC filter add dev $DEV2 protocol ip pref 1 parent ffff: handle 0xffffffff flower action ok",
+        "expExitCode": "0",
+        "verifyCmd": "$TC filter show dev $DEV2 ingress",
+        "matchPattern": "filter protocol ip pref 1 flower.*handle 0xffffffff",
+        "matchCount": "1",
+        "teardown": [
+            "$TC qdisc del dev $DEV2 ingress"
+        ]
+    },
     {
         "id": "d052",
         "name": "Add 1M filters with the same action",