Misc fixes for undefined behavior, crashes, and build failure

gpt4all-backend/src/llmodel.cpp

@@ -140,9 +140,14 @@ const std::vector<LLModel::Implementation> &LLModel::Implementation::implementat
             std::string path;
             // Split the paths string by the delimiter and process each path.
             while (std::getline(ss, path, ';')) {
-                std::u8string u8_path(path.begin(), path.end());
+                fs::directory_iterator iter;
+                try {
+                    iter = fs::directory_iterator(std::u8string(path.begin(), path.end()));
+                } catch (const fs::filesystem_error &) {
+                    continue; // skip nonexistent path
+                }
                 // Iterate over all libraries
-                for (const auto &f : fs::directory_iterator(u8_path)) {
+                for (const auto &f : iter) {
                     const fs::path &p = f.path();
 
                     if (p.extension() != LIB_FILE_EXT) continue;

gpt4all-chat/CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## [Unreleased]
+
+### Fixed
+- Fix several potential crashes ([#3465](https://github.com/nomic-ai/gpt4all/pull/3465))
+
 ## [3.9.0] - 2025-02-04
 
 ### Added
@@ -295,6 +300,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 - Fix several Vulkan resource management issues ([#2694](https://github.com/nomic-ai/gpt4all/pull/2694))
 - Fix crash/hang when some models stop generating, by showing special tokens ([#2701](https://github.com/nomic-ai/gpt4all/pull/2701))
 
+[Unreleased]: https://github.com/nomic-ai/gpt4all/compare/v3.9.0...HEAD
 [3.9.0]: https://github.com/nomic-ai/gpt4all/compare/v3.8.0...v3.9.0
 [3.8.0]: https://github.com/nomic-ai/gpt4all/compare/v3.7.0...v3.8.0
 [3.7.0]: https://github.com/nomic-ai/gpt4all/compare/v3.6.1...v3.7.0

gpt4all-chat/src/chatmodel.h

@@ -204,7 +204,8 @@ class ChatItem : public QObject
         : QObject(nullptr)
     {
         moveToThread(parent->thread());
-        setParent(parent);
+        // setParent must be called from the thread the object lives in
+        QMetaObject::invokeMethod(this, [this, parent]() { this->setParent(parent); });
     }
 
     // NOTE: System messages are currently never serialized and only *stored* by the local server.

gpt4all-chat/src/database.cpp

@@ -1111,9 +1111,9 @@ class DocumentReader {
 public:
     struct Metadata { QString title, author, subject, keywords; };
 
-    static std::unique_ptr<DocumentReader> fromDocument(const DocumentInfo &info);
+    static std::unique_ptr<DocumentReader> fromDocument(DocumentInfo info);
 
-    const DocumentInfo           &doc     () const { return *m_info; }
+    const DocumentInfo           &doc     () const { return m_info; }
     const Metadata               &metadata() const { return m_metadata; }
     const std::optional<QString> &word    () const { return m_word; }
     const std::optional<QString> &nextWord()       { m_word = advance(); return m_word; }
@@ -1123,8 +1123,8 @@ class DocumentReader {
     virtual ~DocumentReader() = default;
 
 protected:
-    explicit DocumentReader(const DocumentInfo &info)
-        : m_info(&info) {}
+    explicit DocumentReader(DocumentInfo info)
+        : m_info(std::move(info)) {}
 
     void postInit(Metadata &&metadata = {})
     {
@@ -1134,18 +1134,18 @@ class DocumentReader {
 
     virtual std::optional<QString> advance() = 0;
 
-    const DocumentInfo     *m_info;
-    Metadata                m_metadata;
-    std::optional<QString>  m_word;
+    DocumentInfo           m_info;
+    Metadata               m_metadata;
+    std::optional<QString> m_word;
 };
 
 namespace {
 
 #ifdef GPT4ALL_USE_QTPDF
 class PdfDocumentReader final : public DocumentReader {
 public:
-    explicit PdfDocumentReader(const DocumentInfo &info)
-        : DocumentReader(info)
+    explicit PdfDocumentReader(DocumentInfo info)
+        : DocumentReader(std::move(info))
     {
         QString path = info.file.canonicalFilePath();
         if (m_doc.load(path) != QPdfDocument::Error::None)
@@ -1185,8 +1185,8 @@ class PdfDocumentReader final : public DocumentReader {
 #else
 class PdfDocumentReader final : public DocumentReader {
 public:
-    explicit PdfDocumentReader(const DocumentInfo &info)
-        : DocumentReader(info)
+    explicit PdfDocumentReader(DocumentInfo info)
+        : DocumentReader(std::move(info))
     {
         QString path = info.file.canonicalFilePath();
         m_doc = FPDF_LoadDocument(path.toUtf8().constData(), nullptr);
@@ -1277,8 +1277,8 @@ class PdfDocumentReader final : public DocumentReader {
 
 class WordDocumentReader final : public DocumentReader {
 public:
-    explicit WordDocumentReader(const DocumentInfo &info)
-        : DocumentReader(info)
+    explicit WordDocumentReader(DocumentInfo info)
+        : DocumentReader(std::move(info))
         , m_doc(info.file.canonicalFilePath().toStdString())
     {
         m_doc.open();
@@ -1370,8 +1370,8 @@ class WordDocumentReader final : public DocumentReader {
 
 class TxtDocumentReader final : public DocumentReader {
 public:
-    explicit TxtDocumentReader(const DocumentInfo &info)
-        : DocumentReader(info)
+    explicit TxtDocumentReader(DocumentInfo info)
+        : DocumentReader(std::move(info))
         , m_file(info.file.canonicalFilePath())
     {
         if (!m_file.open(QIODevice::ReadOnly))
@@ -1412,26 +1412,26 @@ class TxtDocumentReader final : public DocumentReader {
 
 } // namespace
 
-std::unique_ptr<DocumentReader> DocumentReader::fromDocument(const DocumentInfo &doc)
+std::unique_ptr<DocumentReader> DocumentReader::fromDocument(DocumentInfo doc)
 {
     if (doc.isPdf())
-        return std::make_unique<PdfDocumentReader>(doc);
+        return std::make_unique<PdfDocumentReader>(std::move(doc));
     if (doc.isDocx())
-        return std::make_unique<WordDocumentReader>(doc);
-    return std::make_unique<TxtDocumentReader>(doc);
+        return std::make_unique<WordDocumentReader>(std::move(doc));
+    return std::make_unique<TxtDocumentReader>(std::move(doc));
 }
 
 ChunkStreamer::ChunkStreamer(Database *database)
     : m_database(database) {}
 
 ChunkStreamer::~ChunkStreamer() = default;
 
-void ChunkStreamer::setDocument(const DocumentInfo &doc, int documentId, const QString &embeddingModel)
+void ChunkStreamer::setDocument(DocumentInfo doc, int documentId, const QString &embeddingModel)
 {
     auto docKey = doc.key();
     if (!m_docKey || *m_docKey != docKey) {
         m_docKey         = docKey;
-        m_reader         = DocumentReader::fromDocument(doc);
+        m_reader         = DocumentReader::fromDocument(std::move(doc));
         m_documentId     = documentId;
         m_embeddingModel = embeddingModel;
         m_chunk.clear();
@@ -1441,7 +1441,8 @@ void ChunkStreamer::setDocument(const DocumentInfo &doc, int documentId, const Q
         if (m_database->m_documentIdCache.contains(documentId)) {
             QSqlQuery q(m_database->m_db);
             if (!m_database->removeChunksByDocumentId(q, documentId))
-                handleDocumentError("ERROR: Cannot remove chunks of document", documentId, doc.file.canonicalPath(), q.lastError());
+                handleDocumentError("ERROR: Cannot remove chunks of document",
+                                    documentId, m_reader->doc().file.canonicalPath(), q.lastError());
         }
     }
 }

gpt4all-chat/src/database.h

@@ -171,7 +171,7 @@ class ChunkStreamer {
     explicit ChunkStreamer(Database *database);
     ~ChunkStreamer();
 
-    void setDocument(const DocumentInfo &doc, int documentId, const QString &embeddingModel);
+    void setDocument(DocumentInfo doc, int documentId, const QString &embeddingModel);
     std::optional<DocumentInfo::key_type> currentDocKey() const;
     void reset();
 

gpt4all-chat/src/embllm.cpp

@@ -359,8 +359,11 @@ void EmbeddingLLMWorker::handleFinished()
     if (retrievedData.isValid() && retrievedData.canConvert<QVector<EmbeddingChunk>>())
         chunks = retrievedData.value<QVector<EmbeddingChunk>>();
 
-    QVariant response = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
-    Q_ASSERT(response.isValid());
+    QVariant response;
+    if (reply->error() != QNetworkReply::NoError) {
+        response = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
+        Q_ASSERT(response.isValid());
+    }
     bool ok;
     int code = response.toInt(&ok);
     if (!ok || code != 200) {

gpt4all-chat/src/logger.cpp

@@ -4,6 +4,7 @@
 #include <QDebug>
 #include <QGlobalStatic>
 #include <QIODevice>
+#include <QMutexLocker>
 #include <QStandardPaths>
 
 #include <cstdio>
@@ -62,8 +63,11 @@ void Logger::messageHandler(QtMsgType type, const QMessageLogContext &, const QS
     }
     // Get time and date
     auto timestamp = QDateTime::currentDateTime().toString();
-    // Write message
+
     const std::string out = u"[%1] (%2): %3\n"_s.arg(typeString, timestamp, msg).toStdString();
+
+    // Write message
+    QMutexLocker locker(&logger->m_mutex);
     logger->m_file.write(out.c_str());
     logger->m_file.flush();
     std::cerr << out;

gpt4all-chat/src/logger.h

@@ -2,19 +2,23 @@
 #define LOGGER_H
 
 #include <QFile>
+#include <QMutex>
 #include <QString>
 #include <QtLogging>
 
-class Logger
-{
-    QFile m_file;
+class Logger {
+public:
+    explicit Logger();
+
+    static Logger *globalInstance();
 
+private:
     static void messageHandler(QtMsgType type, const QMessageLogContext &context, const QString &msg);
 
-public:
-    static Logger *globalInstance();
+private:
+    QFile  m_file;
+    QMutex m_mutex;
 
-    explicit Logger();
     friend class MyLogger;
 };
 

gpt4all-chat/src/network.cpp

@@ -242,6 +242,12 @@ void Network::handleJsonUploadFinished()
 
     m_activeUploads.removeAll(jsonReply);
 
+    if (jsonReply->error() != QNetworkReply::NoError) {
+        qWarning() << "Request to" << jsonReply->url().toString() << "failed:" << jsonReply->errorString();
+        jsonReply->deleteLater();
+        return;
+    }
+
     QVariant response = jsonReply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
     Q_ASSERT(response.isValid());
     bool ok;
@@ -449,6 +455,11 @@ void Network::handleIpifyFinished()
     QNetworkReply *reply = qobject_cast<QNetworkReply *>(sender());
     if (!reply)
         return;
+    if (reply->error() != QNetworkReply::NoError) {
+        qWarning() << "Request to" << reply->url().toString() << "failed:" << reply->errorString();
+        reply->deleteLater();
+        return;
+    }
 
     QVariant response = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
     Q_ASSERT(response.isValid());
@@ -473,6 +484,11 @@ void Network::handleMixpanelFinished()
     QNetworkReply *reply = qobject_cast<QNetworkReply *>(sender());
     if (!reply)
         return;
+    if (reply->error() != QNetworkReply::NoError) {
+        qWarning() << "Request to" << reply->url().toString() << "failed:" << reply->errorString();
+        reply->deleteLater();
+        return;
+    }
 
     QVariant response = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
     Q_ASSERT(response.isValid());
@@ -511,6 +527,11 @@ void Network::handleHealthFinished()
     QNetworkReply *healthReply = qobject_cast<QNetworkReply *>(sender());
     if (!healthReply)
         return;
+    if (healthReply->error() != QNetworkReply::NoError) {
+        qWarning() << "Request to" << healthReply->url().toString() << "failed:" << healthReply->errorString();
+        healthReply->deleteLater();
+        return;
+    }
 
     QVariant response = healthReply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
     Q_ASSERT(response.isValid());

gpt4all-chat/translations/gpt4all_ro_RO.ts

@@ -498,11 +498,6 @@
         <source>enter $BASE_URL</source>
         <translation>introdu $BASE_URL</translation>
     </message>
-    <message>
-        <location filename="../qml/AddHFModelView.qml" line="600"/>
-        <source>ERROR: $API_KEY is empty.</source>
-        <translation>EROARE: $API_KEY absentă</translation>
-    </message>
     <message>
         <location filename="../qml/AddHFModelView.qml" line="606"/>
         <source>enter $MODEL_NAME</source>