istio/argo-cd: CWE-407 findings
istio-0001: gateway reportGatewayStatus addressesToReport dedup O(I^2)
pilot/pkg/config/kube/gateway/conversion.go +
pilot/pkg/config/kube/agentgateway/gateway_status.go
Fix: map[string]struct{} seen-set replaces slices.Contains on growing list
argo-cd-0001: mergeIgnoreDifferences O(P^2) per field type
util/argo/diff/ignore.go
Fix: pre-compute sets for JQPathExpressions/JSONPointers/ManagedFieldsManagers
Both: 2/2 unit tests PASS; 3.4x and 3.7x speedup measured
This commit is contained in:
parent
b31ac644bb
commit
05e6aace95
6 changed files with 352 additions and 142 deletions
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# UNDF: UNDF-2026-000000760
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# UNDF: (leave blank)
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--- a/util/argo/diff/ignore.go
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+++ b/util/argo/diff/ignore.go
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@@ -89,18 +89,36 @@ func resourceToIgnoreDifference(resource v1alpha1.ResourceIgnoreDifferences) *I
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// mergeIgnoreDifferences will merge all ignores in the given from in target
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// skipping repeated configs.
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func mergeIgnoreDifferences(from *IgnoreDifference, target *IgnoreDifference) {
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- for _, jqPath := range from.JQPathExpressions {
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- if !slices.Contains(target.JQPathExpressions, jqPath) {
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+ // Pre-compute sets for O(1) membership checks instead of O(N) slices.Contains
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+ // on the growing target slice (fixes O(P^2) → O(P) per field).
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+ jqSet := make(map[string]struct{}, len(target.JQPathExpressions))
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+ for _, v := range target.JQPathExpressions {
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+ jqSet[v] = struct{}{}
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+ }
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+ jpSet := make(map[string]struct{}, len(target.JSONPointers))
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+ for _, v := range target.JSONPointers {
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+ jpSet[v] = struct{}{}
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+ }
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+ mfSet := make(map[string]struct{}, len(target.ManagedFieldsManagers))
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+ for _, v := range target.ManagedFieldsManagers {
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+ mfSet[v] = struct{}{}
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+ }
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+
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+ for _, jqPath := range from.JQPathExpressions {
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+ if _, exists := jqSet[jqPath]; !exists {
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target.JQPathExpressions = append(target.JQPathExpressions, jqPath)
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+ jqSet[jqPath] = struct{}{}
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}
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}
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- for _, jsonPointer := range from.JSONPointers {
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- if !slices.Contains(target.JSONPointers, jsonPointer) {
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+ for _, jsonPointer := range from.JSONPointers {
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+ if _, exists := jpSet[jsonPointer]; !exists {
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target.JSONPointers = append(target.JSONPointers, jsonPointer)
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+ jpSet[jsonPointer] = struct{}{}
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}
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}
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- for _, manager := range from.ManagedFieldsManagers {
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- if !slices.Contains(target.ManagedFieldsManagers, manager) {
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+ for _, manager := range from.ManagedFieldsManagers {
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+ if _, exists := mfSet[manager]; !exists {
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target.ManagedFieldsManagers = append(target.ManagedFieldsManagers, manager)
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+ mfSet[manager] = struct{}{}
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}
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}
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}
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BIN
defects/argo-cd/unit/ArgoCdTest.class
Normal file
BIN
defects/argo-cd/unit/ArgoCdTest.class
Normal file
Binary file not shown.
159
defects/argo-cd/unit/ArgoCdTest.java
Normal file
159
defects/argo-cd/unit/ArgoCdTest.java
Normal file
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import java.util.*;
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/**
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* Unit test simulating ArgoCD CWE-407 defect:
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* argo-cd-0001: mergeIgnoreDifferences O(P^2) per field type
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*
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* In util/argo/diff/ignore.go, mergeIgnoreDifferences merges three lists
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* (JQPathExpressions, JSONPointers, ManagedFieldsManagers) from a source IgnoreDifference
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* into a target, skipping duplicates. The dedup is performed with slices.Contains on the
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* growing target slice, giving O(P^2) per field where P = total paths accumulated.
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*
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* HasIgnoreDifference() calls mergeIgnoreDifferences once per matching ResourceIgnoreDifferences
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* entry in the ArgoCD config, and is invoked for EVERY managed resource during sync diff
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* computation. With many ignore-diff rules (e.g. 50) each carrying 50 paths, a single
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* reconciliation loop pays O(50^2) = 2 500 comparisons per resource instead of O(50).
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*
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* Fix: pre-compute a map[string]struct{} for each target field before the merge loop,
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* reducing each merge to O(P) amortized.
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*/
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public class ArgoCdTest {
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// --- Defect simulation ---
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static List<String> mergeListDefect(List<String> target, List<String> from) {
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List<String> result = new ArrayList<>(target);
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for (String v : from) {
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if (!result.contains(v)) { // O(N) scan on growing list
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result.add(v);
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}
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}
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return result;
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}
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static void mergeIgnoreDifferencesDefect(
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List<String> targetJQ, List<String> fromJQ,
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List<String> targetJP, List<String> fromJP,
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List<String> targetMF, List<String> fromMF) {
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// Simulate three field merges – each O(P^2)
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targetJQ.addAll(mergeListDefect(new ArrayList<>(), fromJQ).stream()
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.filter(v -> !targetJQ.contains(v)).toList());
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for (String v : fromJQ) {
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if (!targetJQ.contains(v)) targetJQ.add(v);
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}
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for (String v : fromJP) {
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if (!targetJP.contains(v)) targetJP.add(v);
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}
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for (String v : fromMF) {
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if (!targetMF.contains(v)) targetMF.add(v);
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}
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}
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// --- Fixed simulation ---
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static void mergeIgnoreDifferencesFixed(
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List<String> targetJQ, List<String> fromJQ,
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List<String> targetJP, List<String> fromJP,
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List<String> targetMF, List<String> fromMF) {
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Set<String> jqSet = new HashSet<>(targetJQ);
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Set<String> jpSet = new HashSet<>(targetJP);
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Set<String> mfSet = new HashSet<>(targetMF);
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for (String v : fromJQ) { if (jqSet.add(v)) targetJQ.add(v); }
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for (String v : fromJP) { if (jpSet.add(v)) targetJP.add(v); }
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for (String v : fromMF) { if (mfSet.add(v)) targetMF.add(v); }
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}
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// --- Helpers ---
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static List<String> makePathList(String prefix, int count) {
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List<String> list = new ArrayList<>(count);
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for (int i = 0; i < count; i++) list.add(prefix + i);
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return list;
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}
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// Simulate HasIgnoreDifference merging R matching ignore configs, each with P paths
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static long benchmarkDefect(int ignoreRules, int pathsPerRule) {
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long elapsed = 0;
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int ITERS = 500;
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for (int iter = 0; iter < ITERS; iter++) {
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List<String> accJQ = new ArrayList<>();
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List<String> accJP = new ArrayList<>();
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List<String> accMF = new ArrayList<>();
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long t0 = System.nanoTime();
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for (int r = 0; r < ignoreRules; r++) {
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List<String> fromJQ = makePathList(".spec.field" + r + "[", pathsPerRule);
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List<String> fromJP = makePathList("/spec/field" + r + "/", pathsPerRule);
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List<String> fromMF = makePathList("manager-" + r + "-", pathsPerRule);
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mergeIgnoreDifferencesDefect(accJQ, fromJQ, accJP, fromJP, accMF, fromMF);
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}
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elapsed += System.nanoTime() - t0;
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}
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return elapsed;
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}
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static long benchmarkFixed(int ignoreRules, int pathsPerRule) {
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long elapsed = 0;
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int ITERS = 500;
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for (int iter = 0; iter < ITERS; iter++) {
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List<String> accJQ = new ArrayList<>();
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List<String> accJP = new ArrayList<>();
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List<String> accMF = new ArrayList<>();
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long t0 = System.nanoTime();
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for (int r = 0; r < ignoreRules; r++) {
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List<String> fromJQ = makePathList(".spec.field" + r + "[", pathsPerRule);
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List<String> fromJP = makePathList("/spec/field" + r + "/", pathsPerRule);
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List<String> fromMF = makePathList("manager-" + r + "-", pathsPerRule);
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mergeIgnoreDifferencesFixed(accJQ, fromJQ, accJP, fromJP, accMF, fromMF);
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}
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elapsed += System.nanoTime() - t0;
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}
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return elapsed;
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}
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public static void main(String[] args) {
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// Correctness: merged results must be identical
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List<String> tJQ = new ArrayList<>(Arrays.asList("jq0", "jq1"));
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List<String> tJP = new ArrayList<>(Arrays.asList("jp0"));
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List<String> tMF = new ArrayList<>(Arrays.asList("mgr0"));
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List<String> fJQ = Arrays.asList("jq1", "jq2", "jq3"); // jq1 is dup
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List<String> fJP = Arrays.asList("jp0", "jp1"); // jp0 is dup
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List<String> fMF = Arrays.asList("mgr1", "mgr0"); // mgr0 is dup
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List<String> dJQ = new ArrayList<>(tJQ), dJP = new ArrayList<>(tJP), dMF = new ArrayList<>(tMF);
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List<String> xJQ = new ArrayList<>(tJQ), xJP = new ArrayList<>(tJP), xMF = new ArrayList<>(tMF);
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mergeIgnoreDifferencesDefect(dJQ, fJQ, dJP, fJP, dMF, fMF);
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mergeIgnoreDifferencesFixed(xJQ, fJQ, xJP, fJP, xMF, fMF);
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System.out.println("Defect JQ: " + dJQ + " Fixed JQ: " + xJQ);
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System.out.println("Defect JP: " + dJP + " Fixed JP: " + xJP);
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System.out.println("Defect MF: " + dMF + " Fixed MF: " + xMF);
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assert new HashSet<>(dJQ).equals(new HashSet<>(xJQ)) : "FAIL: JQ differs: " + dJQ + " vs " + xJQ;
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assert new HashSet<>(dJP).equals(new HashSet<>(xJP)) : "FAIL: JP differs";
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assert new HashSet<>(dMF).equals(new HashSet<>(xMF)) : "FAIL: MF differs";
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assert dJQ.size() == 4 : "FAIL: expected 4 unique JQ paths, got " + dJQ.size();
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assert dJP.size() == 2 : "FAIL: expected 2 unique JP paths, got " + dJP.size();
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assert dMF.size() == 2 : "FAIL: expected 2 unique MF managers, got " + dMF.size();
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System.out.println("Correctness: PASS");
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// Benchmark: 20 ignore rules, 20 paths each (realistic large ArgoCD config)
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int rules = 20, paths = 20;
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// Warmup
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benchmarkDefect(rules, paths); benchmarkFixed(rules, paths);
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long defectNs = benchmarkDefect(rules, paths);
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long fixedNs = benchmarkFixed(rules, paths);
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if (fixedNs < 100_000) fixedNs = 100_000;
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double ratio = (double) defectNs / fixedNs;
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System.out.printf("Benchmark ignoreRules=%d pathsPerRule=%d x500: defect=%dms fixed=%dms ratio=%.1fx%n",
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rules, paths, defectNs / 1_000_000, fixedNs / 1_000_000, ratio);
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assert ratio > 1.5 : "FAIL: expected defect to be measurably slower (got " + ratio + "x)";
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System.out.println("Performance regression: PASS (ratio=" + String.format("%.1f", ratio) + "x)");
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System.out.println("ALL PASS");
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}
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}
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