tetragon: Add killer test for both bits

Signed-off-by: Jiri Olsa <[email protected]>
cilium · Dec 5, 2023 · 4b3c61b · 4b3c61b
1 parent 701e36f
commit 4b3c61b
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Showing 2 changed files with 85 additions and 5 deletions.
diff --git a/pkg/sensors/tracing/killer_amd64_test.go b/pkg/sensors/tracing/killer_amd64_test.go
@@ -76,7 +76,7 @@ spec:
 		}
 	}
 
-	testKiller(t, configHook, test, checker, checkerFunc)
+	testKiller(t, configHook, test, "", checker, checkerFunc)
 }
 
 func TestKillerSignal32(t *testing.T) {
@@ -136,5 +136,77 @@ spec:
 		}
 	}
 
-	testKiller(t, configHook, test, checker, checkerFunc)
+	testKiller(t, configHook, test, "", checker, checkerFunc)
+}
+
+func TestKillerOverrideBothBits(t *testing.T) {
+	if !bpf.HasOverrideHelper() {
+		t.Skip("skipping killer test, bpf_override_return helper not available")
+	}
+
+	test32 := testutils.RepoRootPath("contrib/tester-progs/killer-tester-32")
+	test64 := testutils.RepoRootPath("contrib/tester-progs/killer-tester")
+
+	configHook := `
+apiVersion: cilium.io/v1alpha1
+kind: TracingPolicy
+metadata:
+  name: "kill-syscalls"
+spec:
+  lists:
+  - name: "mine"
+    type: "syscalls"
+    values:
+    - "sys_prctl"
+    - "__ia32_sys_prctl"
+  killers:
+  - syscalls:
+    - "list:mine"
+  tracepoints:
+  - subsystem: "raw_syscalls"
+    event: "sys_enter"
+    args:
+    - index: 4
+      type: "syscall64"
+    selectors:
+    - matchArgs:
+      - index: 0
+        operator: "InMap"
+        values:
+        - "list:mine"
+      matchBinaries:
+      - operator: "In"
+        values:
+        - "` + test32 + `"
+        - "` + test64 + `"
+      matchActions:
+      - action: "NotifyKiller"
+        argError: -17 # EEXIST
+`
+
+	tpChecker32 := ec.NewProcessTracepointChecker("").
+		WithArgs(ec.NewKprobeArgumentListMatcher().
+			WithOperator(lc.Ordered).
+			WithValues(
+				ec.NewKprobeArgumentChecker().WithSizeArg(i386.SYS_PRCTL),
+			)).
+		WithAction(tetragon.KprobeAction_KPROBE_ACTION_NOTIFYKILLER)
+
+	tpChecker64 := ec.NewProcessTracepointChecker("").
+		WithArgs(ec.NewKprobeArgumentListMatcher().
+			WithOperator(lc.Ordered).
+			WithValues(
+				ec.NewKprobeArgumentChecker().WithSizeArg(syscall.SYS_PRCTL),
+			)).
+		WithAction(tetragon.KprobeAction_KPROBE_ACTION_NOTIFYKILLER)
+
+	checker := ec.NewUnorderedEventChecker(tpChecker32, tpChecker64)
+
+	checkerFunc := func(err error, rc int) {
+		if rc != int(syscall.EEXIST) {
+			t.Fatalf("Wrong exit code %d expected %d", rc, int(syscall.EEXIST))
+		}
+	}
+
+	testKiller(t, configHook, test64, test32, checker, checkerFunc)
 }
diff --git a/pkg/sensors/tracing/killer_test.go b/pkg/sensors/tracing/killer_test.go
@@ -23,7 +23,8 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func testKiller(t *testing.T, configHook string, test string,
+func testKiller(t *testing.T, configHook string,
+	test string, test2 string,
 	checker *eventchecker.UnorderedEventChecker,
 	checkerFunc func(err error, rc int)) {
 
@@ -50,6 +51,13 @@ func testKiller(t *testing.T, configHook string, test string,
 
 	checkerFunc(err, cmd.ProcessState.ExitCode())
 
+	if test2 != "" {
+		cmd := exec.Command(test2)
+		err = cmd.Run()
+
+		checkerFunc(err, cmd.ProcessState.ExitCode())
+	}
+
 	err = jsonchecker.JsonTestCheck(t, checker)
 	assert.NoError(t, err)
 }
@@ -111,7 +119,7 @@ spec:
 		}
 	}
 
-	testKiller(t, configHook, test, checker, checkerFunc)
+	testKiller(t, configHook, test, "", checker, checkerFunc)
 }
 
 func TestKillerSignal(t *testing.T) {
@@ -171,7 +179,7 @@ spec:
 		}
 	}
 
-	testKiller(t, configHook, test, checker, checkerFunc)
+	testKiller(t, configHook, test, "", checker, checkerFunc)
 }
 
 func TestKillerMulti(t *testing.T) {