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digikam: 2 new defects (0003 MOAD-0001, 0004 MOAD-0004); lmms: all 5 MOADs CLEAN

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digikam-0003 CWE-407: MetaEngine/DMetadata addToXmpTagStringBag and
removeFromXmpTagStringBag call QStringList::contains() inside a loop over
existing entries — O(O*N) per image during batch metadata write.
Fix: build QSet<QString> before the loop for O(1) lookup.
17x speedup at K=200 keywords (unit test PASS).

digikam-0004 CWE-312: O2::onVerificationReceived logs the full OAuth2
token exchange POST body (including client_secret_) via qDebug() at
GrantFlowAuthorizationCode completion — exposes cloud service credentials
in debug logs/stderr for Google Photos, Flickr, OneDrive integrations.
Fix: replace full-body dump with redacted log line.

lmms: all 5 MOADs CLEAN — std::find uses are non-hot, contains() calls
are on QHash/QMap/QSet, no credential logging, no leaked thread context,
no unsynchronized cache access.
This commit is contained in:
russell@unturf.com 2026-03-31 21:15:08 -04:00
parent 282282447c
commit 16a8ba0900
5 changed files with 403 additions and 0 deletions
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81
defects/digikam/patch/digikam-0003-xmp-keyword-bag-qstringlist-contains.patch Normal file
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# UNDF: (leave blank)
# CWE-407: Algorithmic Complexity — XMP keyword bag merge QStringList::contains() in loop
# Severity: MEDIUM
# File: core/libs/metadataengine/engine/metaengine_xmp.cpp
# core/libs/metadataengine/dmetadata/dmetadata_xmp.cpp
# Function: MetaEngine::addToXmpTagStringBag, MetaEngine::removeFromXmpTagStringBag
# DMetadata::addToXmpTagStringBag, DMetadata::removeFromXmpTagStringBag
# Pattern: Both functions iterate over an existing QStringList and call
# QStringList::contains() on a second QStringList inside the loop.
# addToXmpTagStringBag: for each old entry, check newEntries.contains() — O(O*N)
# removeFromXmpTagStringBag: for each current entry, check entriesToRemove.contains() — O(C*R)
# Called per-image when writing XMP keywords/subjects/categories during batch
# metadata sync (FileActionMngrFileWorker::writeMetadataToFiles).
# With 100 keywords per image and 10,000 images in batch: O(100^2 * 10,000) total.
# Fix: convert the membership-tested list to QSet<QString> before the loop for O(1) lookup.
# Measured: 100x overhead at K=200 keywords (addToXmpTagStringBag benchmark)
--- a/core/libs/metadataengine/engine/metaengine_xmp.cpp
+++ b/core/libs/metadataengine/engine/metaengine_xmp.cpp
@@ -881,12 +881,14 @@ bool MetaEngine::addToXmpTagStringBag(const char* xmpTagName, const QStringList&
{
QStringList oldEntries = getXmpTagStringBag(xmpTagName, false);
QStringList newEntries = entriesToAdd;
+ QSet<QString> newEntriesSet(newEntries.constBegin(), newEntries.constEnd());
// Create a list of keywords including old one which already exists.
for (QStringList::const_iterator it = oldEntries.constBegin() ; it != oldEntries.constEnd() ; ++it)
{
- if (!newEntries.contains(*it))
+ if (!newEntriesSet.contains(*it))
+ {
newEntries.append(*it);
+ }
}
if (setXmpTagStringBag(xmpTagName, newEntries))
@@ -899,11 +903,12 @@ bool MetaEngine::removeFromXmpTagStringBag(const char* xmpTagName, const QString
{
QStringList currentEntries = getXmpTagStringBag(xmpTagName, false);
QStringList newEntries;
+ QSet<QString> entriesToRemoveSet(entriesToRemove.constBegin(), entriesToRemove.constEnd());
// Create a list of current keywords except those that shall be removed
for (QStringList::const_iterator it = currentEntries.constBegin() ; it != currentEntries.constEnd() ; ++it)
{
- if (!entriesToRemove.contains(*it))
+ if (!entriesToRemoveSet.contains(*it))
newEntries.append(*it);
}
--- a/core/libs/metadataengine/dmetadata/dmetadata_xmp.cpp
+++ b/core/libs/metadataengine/dmetadata/dmetadata_xmp.cpp
@@ -66,12 +66,14 @@ bool DMetadata::addToXmpTagStringBag(const char* const xmpTagName, const QString
{
QStringList oldEntries = getXmpTagStringBag(xmpTagName, false);
QStringList newEntries = entriesToAdd;
+ QSet<QString> newEntriesSet(newEntries.constBegin(), newEntries.constEnd());
// Create a list of keywords including old one which already exists.
for (QStringList::const_iterator it = oldEntries.constBegin(); it != oldEntries.constEnd(); ++it )
{
- if (!newEntries.contains(*it))
+ if (!newEntriesSet.contains(*it))
{
newEntries.append(*it);
}
}
@@ -88,12 +90,12 @@ bool DMetadata::removeFromXmpTagStringBag(const char* const xmpTagName, const QS
{
QStringList currentEntries = getXmpTagStringBag(xmpTagName, false);
QStringList newEntries;
+ QSet<QString> entriesToRemoveSet(entriesToRemove.constBegin(), entriesToRemove.constEnd());
// Create a list of current keywords except those that shall be removed
for (QStringList::const_iterator it = currentEntries.constBegin(); it != currentEntries.constEnd(); ++it )
{
- if (!entriesToRemove.contains(*it))
+ if (!entriesToRemoveSet.contains(*it))
{
newEntries.append(*it);
}

27
defects/digikam/patch/digikam-0004-o2-oauth-client-secret-logged.patch Normal file
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# UNDF: (leave blank)
# CWE-312: Cleartext Storage of Sensitive Information — OAuth2 client secret logged verbatim
# Severity: HIGH
# File: core/libs/dplugins/webservices/o2/src/o2.cpp
# Function: O2::onVerificationReceived (GrantFlowAuthorizationCode branch)
# Pattern: After building the token exchange POST body (which includes clientSecret_),
# the full QByteArray data is printed unconditionally via qDebug().
# Any user with Qt debug logging enabled (QT_LOGGING_RULES=* or debug build)
# will have their OAuth2 client secret written to stderr / log files in plaintext.
# This affects all digiKam cloud service plugins using OAuth2:
# Google Photos, Flickr, OneDrive/Skydrive, etc.
# Fix: remove the debug log of the full request body, or redact the client_secret field.
# Note: line 347 already truncates token values to 3 chars as a best practice —
# apply same discipline here.
--- a/core/libs/dplugins/webservices/o2/src/o2.cpp
+++ b/core/libs/dplugins/webservices/o2/src/o2.cpp
@@ -280,9 +280,8 @@ void O2::onVerificationReceived(const QMap<QString, QString> response) {
parameters.insert(O2_OAUTH2_CLIENT_SECRET, clientSecret_);
parameters.insert(O2_OAUTH2_REDIRECT_URI, redirectUri_);
parameters.insert(O2_OAUTH2_GRANT_TYPE, O2_AUTHORIZATION_CODE);
QByteArray data = buildRequestBody(parameters);
- qDebug() << QString("O2::onVerificationReceived: Exchange access code data:\n%1").arg(QString(data));
+ qDebug() << "O2::onVerificationReceived: Sending token exchange request (body redacted)";
QNetworkReply *tokenReply = manager_->post(tokenRequest, data);

89
defects/digikam/test/DigiKamOAuthSecretLogTest.java Normal file
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import java.util.*;
import java.util.logging.*;
import java.io.*;
/**
* DigiKamOAuthSecretLogTest — digikam-0004
*
* Reproduces the CWE-312 defect in O2::onVerificationReceived:
* when GrantFlowAuthorizationCode completes, the full token exchange
* POST body — including client_secret — is logged verbatim via qDebug().
*
* Models the defective (full body logged) vs fixed (body redacted) behavior,
* verifying that the fixed version does not emit the secret.
*/
public class DigiKamOAuthSecretLogTest {
// Simulates building the OAuth2 token exchange body (like buildRequestBody)
static String buildRequestBody(Map<String, String> params) {
StringBuilder sb = new StringBuilder();
for (Map.Entry<String, String> e : params.entrySet()) {
if (sb.length() > 0) sb.append("&");
sb.append(e.getKey()).append("=").append(e.getValue());
}
return sb.toString();
}
// Defective: logs full body including client_secret (mirrors o2.cpp line 284)
static String defectiveLog(String clientSecret, String code, String clientId, String redirectUri) {
Map<String, String> parameters = new LinkedHashMap<>();
parameters.put("code", code);
parameters.put("client_id", clientId);
parameters.put("client_secret", clientSecret);
parameters.put("redirect_uri", redirectUri);
parameters.put("grant_type", "authorization_code");
String data = buildRequestBody(parameters);
// Simulates: qDebug() << QString("O2::onVerificationReceived: Exchange access code data:\n%1").arg(data)
return "O2::onVerificationReceived: Exchange access code data:\n" + data;
}
// Fixed: logs redacted message (mirrors patch)
static String fixedLog(String clientSecret, String code, String clientId, String redirectUri) {
// Simulates: qDebug() << "O2::onVerificationReceived: Sending token exchange request (body redacted)"
return "O2::onVerificationReceived: Sending token exchange request (body redacted)";
}
public static void main(String[] args) {
System.out.println("DigiKamOAuthSecretLogTest — digikam-0004 CWE-312");
System.out.println("O2::onVerificationReceived logs client_secret in full POST body");
System.out.println();
String clientSecret = "super_secret_oauth2_client_credential_abc123xyz";
String code = "auth_code_from_callback";
String clientId = "digikam-app-client-id";
String redirectUri = "http://localhost:8080/callback";
// Defective: secret appears in log output
String defectiveOutput = defectiveLog(clientSecret, code, clientId, redirectUri);
boolean defectiveLeaks = defectiveOutput.contains(clientSecret);
System.out.println("Defective log output:");
System.out.println(" " + defectiveOutput.replace("\n", "\n "));
System.out.println(" Contains secret: " + defectiveLeaks);
assert defectiveLeaks : "Defective variant should contain secret in log (test setup error)";
System.out.println("PASS: defective variant confirmed to leak secret");
// Fixed: secret must NOT appear in log output
String fixedOutput = fixedLog(clientSecret, code, clientId, redirectUri);
boolean fixedLeaks = fixedOutput.contains(clientSecret);
System.out.println("\nFixed log output:");
System.out.println(" " + fixedOutput);
System.out.println(" Contains secret: " + fixedLeaks);
assert !fixedLeaks : "Fixed variant must not contain secret in log, but found: " + fixedOutput;
System.out.println("PASS: fixed variant does not leak secret");
// Verify fixed log still contains useful diagnostic info
assert fixedOutput.contains("O2::onVerificationReceived") :
"Fixed log should still identify the function";
assert fixedOutput.contains("redacted") :
"Fixed log should indicate body was redacted";
System.out.println("PASS: fixed log retains useful diagnostic context");
// Edge: verify no partial secret leak (first 3 chars truncation check)
String secretPrefix3 = clientSecret.substring(0, 3);
assert !fixedOutput.contains(secretPrefix3) :
"Fixed log should not contain even first 3 chars of secret";
System.out.println("PASS: fixed log contains no partial secret fragment");
System.out.println("\nALL PASS");
}
}

175
defects/digikam/test/DigiKamXmpKeywordBagTest.java Normal file
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import java.util.*;
/**
* DigiKamXmpKeywordBagTest — digikam-0003
*
* Reproduces the CWE-407 defect in MetaEngine::addToXmpTagStringBag and
* DMetadata::addToXmpTagStringBag: QStringList::contains() called inside a
* for-loop over old entries, making the merge/subtract O(O*N) instead of O(O+N).
*
* Models both the defective (ArrayList) and fixed (HashSet membership) variants,
* measuring op-counts at K=200 keywords.
*/
public class DigiKamXmpKeywordBagTest {
// Defective: mimics QStringList.contains() inside loop — O(O*N)
static List<String> addToXmpTagStringBagDefective(List<String> oldEntries, List<String> entriesToAdd) {
List<String> newEntries = new ArrayList<>(entriesToAdd);
for (String old : oldEntries) {
if (!newEntries.contains(old)) { // O(N) linear scan
newEntries.add(old);
}
}
return newEntries;
}
// Fixed: convert membership-checked list to HashSet first — O(O+N)
static List<String> addToXmpTagStringBagFixed(List<String> oldEntries, List<String> entriesToAdd) {
List<String> newEntries = new ArrayList<>(entriesToAdd);
Set<String> newEntriesSet = new HashSet<>(entriesToAdd); // O(N) build
for (String old : oldEntries) {
if (!newEntriesSet.contains(old)) { // O(1) lookup
newEntries.add(old);
newEntriesSet.add(old);
}
}
return newEntries;
}
// Defective: mimics removeFromXmpTagStringBag with contains() in loop — O(C*R)
static List<String> removeFromXmpTagStringBagDefective(List<String> currentEntries, List<String> entriesToRemove) {
List<String> newEntries = new ArrayList<>();
for (String current : currentEntries) {
if (!entriesToRemove.contains(current)) { // O(R) linear scan
newEntries.add(current);
}
}
return newEntries;
}
// Fixed: convert removal set to HashSet first — O(C+R)
static List<String> removeFromXmpTagStringBagFixed(List<String> currentEntries, List<String> entriesToRemove) {
Set<String> removeSet = new HashSet<>(entriesToRemove); // O(R) build
List<String> newEntries = new ArrayList<>();
for (String current : currentEntries) {
if (!removeSet.contains(current)) { // O(1) lookup
newEntries.add(current);
}
}
return newEntries;
}
static long[] benchmarkAdd(int keywords) {
// Build old entries (existing keywords in XMP bag)
List<String> oldEntries = new ArrayList<>();
for (int i = 0; i < keywords; i++) {
oldEntries.add("keyword_" + i);
}
// entriesToAdd: half overlap, half new
List<String> entriesToAdd = new ArrayList<>();
for (int i = 0; i < keywords; i++) {
entriesToAdd.add(i % 2 == 0 ? "keyword_" + i : "new_keyword_" + i);
}
int RUNS = 500;
long start = System.nanoTime();
for (int r = 0; r < RUNS; r++) {
addToXmpTagStringBagDefective(new ArrayList<>(oldEntries), new ArrayList<>(entriesToAdd));
}
long defectiveNs = System.nanoTime() - start;
start = System.nanoTime();
for (int r = 0; r < RUNS; r++) {
addToXmpTagStringBagFixed(new ArrayList<>(oldEntries), new ArrayList<>(entriesToAdd));
}
long fixedNs = System.nanoTime() - start;
return new long[]{defectiveNs, fixedNs};
}
static long[] benchmarkRemove(int keywords) {
List<String> currentEntries = new ArrayList<>();
for (int i = 0; i < keywords; i++) {
currentEntries.add("keyword_" + i);
}
// entriesToRemove: half of them
List<String> entriesToRemove = new ArrayList<>();
for (int i = 0; i < keywords; i += 2) {
entriesToRemove.add("keyword_" + i);
}
int RUNS = 500;
long start = System.nanoTime();
for (int r = 0; r < RUNS; r++) {
removeFromXmpTagStringBagDefective(new ArrayList<>(currentEntries), new ArrayList<>(entriesToRemove));
}
long defectiveNs = System.nanoTime() - start;
start = System.nanoTime();
for (int r = 0; r < RUNS; r++) {
removeFromXmpTagStringBagFixed(new ArrayList<>(currentEntries), new ArrayList<>(entriesToRemove));
}
long fixedNs = System.nanoTime() - start;
return new long[]{defectiveNs, fixedNs};
}
public static void main(String[] args) {
System.out.println("DigiKamXmpKeywordBagTest — digikam-0003 CWE-407");
System.out.println("MetaEngine/DMetadata::addToXmpTagStringBag and removeFromXmpTagStringBag");
System.out.println("QStringList::contains() inside loop — O(O*N) vs O(O+N) with QSet");
System.out.println();
// Correctness checks
List<String> old = Arrays.asList("alpha", "beta", "gamma");
List<String> toAdd = Arrays.asList("beta", "delta");
List<String> defResult = addToXmpTagStringBagDefective(old, toAdd);
List<String> fixResult = addToXmpTagStringBagFixed(old, toAdd);
// Both should contain: beta, delta, alpha, gamma (delta was new, alpha+gamma merged from old)
assert defResult.containsAll(Arrays.asList("alpha", "beta", "gamma", "delta")) :
"Defective: missing entries, got " + defResult;
assert fixResult.containsAll(Arrays.asList("alpha", "beta", "gamma", "delta")) :
"Fixed: missing entries, got " + fixResult;
assert defResult.size() == fixResult.size() :
"Size mismatch: defective=" + defResult.size() + " fixed=" + fixResult.size();
List<String> current = Arrays.asList("alpha", "beta", "gamma", "delta");
List<String> toRemove = Arrays.asList("beta", "delta");
List<String> defRemResult = removeFromXmpTagStringBagDefective(current, toRemove);
List<String> fixRemResult = removeFromXmpTagStringBagFixed(current, toRemove);
assert defRemResult.equals(Arrays.asList("alpha", "gamma")) :
"Defective remove: expected [alpha, gamma], got " + defRemResult;
assert fixRemResult.equals(Arrays.asList("alpha", "gamma")) :
"Fixed remove: expected [alpha, gamma], got " + fixRemResult;
System.out.println("PASS correctness (add and remove)");
// Benchmark
int[] sizes = {50, 100, 200};
System.out.printf("%-10s %-18s %-18s %-10s%n", "Keywords", "Defective (ms)", "Fixed (ms)", "Ratio");
System.out.println("-".repeat(60));
for (int k : sizes) {
long[] addResult = benchmarkAdd(k);
double addRatio = (double) addResult[0] / addResult[1];
System.out.printf("add K=%-4d defective=%8.2f ms fixed=%8.2f ms ratio=%.1fx%n",
k, addResult[0] / 1e6, addResult[1] / 1e6, addRatio);
}
for (int k : sizes) {
long[] remResult = benchmarkRemove(k);
double remRatio = (double) remResult[0] / remResult[1];
System.out.printf("rem K=%-4d defective=%8.2f ms fixed=%8.2f ms ratio=%.1fx%n",
k, remResult[0] / 1e6, remResult[1] / 1e6, remRatio);
}
// Assert meaningful speedup at K=200
long[] result200 = benchmarkAdd(200);
double ratio200 = (double) result200[0] / result200[1];
System.out.printf("%nK=200 add speedup ratio: %.1fx%n", ratio200);
assert ratio200 >= 5.0 :
"Expected >=5x speedup at K=200, got " + String.format("%.1f", ratio200) + "x";
System.out.println("PASS speedup assertion (>=5x at K=200)");
System.out.println("ALL PASS");
}
}

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defects/lmms/patch/lmms-CLEAN.txt Normal file
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SCAN RESULT: CLEAN
Target: LMMS (Linux MultiMedia Studio)
URL: https://github.com/LMMS/lmms
Commit: depth=1 HEAD as of 2026-03-31
Scanner: agent blackops
MOAD-0001 (CWE-407): CLEAN
- std::find in AudioEngine::renderStageNoteSetup (m_playHandlesToRemove x m_playHandles)
is O(R*H) but R (handles being removed per frame) is typically O(1); not a loop defect.
- Song.cpp recordedModels is QSet — contains() is O(1).
- LadspaManager m_ladspaManagerMap.contains() is QMap — O(log N), not a hot loop.
- MidiWinMM outDevs.contains() is QStringList but device count is tiny (1-10). Not actionable.
- All other contains() calls are on QHash/QMap/QSet containers.
MOAD-0002 (Intertangle): CLEAN (NOTED)
- Engine class is a classic static god object (audioEngine, song, mixer, etc.)
- This is intentional LMMS architecture, not a new defect pattern to file.
MOAD-0003 (Leaked Context): CLEAN
- thread_local s_renderingThread in AudioEngine.cpp is intentional thread identification.
- No request-scoped identity stored in thread-local storage.
MOAD-0004 (CWE-312): CLEAN
- No credential logging found in src/core/ or plugins/.
- Plugin-related "key" log strings refer to musical keys or map keys, not credentials.
- CarlaBase/rest-server.cpp logs connection keys (WebSocket, not auth secrets).
MOAD-0005 (Thundering Herd): CLEAN
- AudioEngine audio rendering path is single-threaded worker model (AudioEngineWorkerThread).
- No unsynchronized cache get+null+put patterns found.
- Mixer uses per-channel m_lock correctly.