diff options
author | Kirill Burtsev <kirill.burtsev@qt.io> | 2019-02-11 19:21:03 +0100 |
---|---|---|
committer | Kirill Burtsev <kirill.burtsev@qt.io> | 2019-02-19 15:30:44 +0000 |
commit | 7537526093c92e89672d1e952a9baceecaa91730 (patch) | |
tree | dcb37c57802b90eff5835f54f13ef6a8db059ac7 /src/webenginewidgets/api | |
parent | 755f7e414583c5458c2d421d047a1c7890c8d8d2 (diff) |
Remove download properly on profile destruction to avoid use after free
In the Widgets API, download items are children of the profile and are
destroyed when the parent profile destroys its children. The download
item's destructor can therefore not access the profile, as it would
cause a heap-use-after-free crashes. On quick side turn ongoing downloads
cleanup to match widgets one.
Fixes: QTBUG-73839
Change-Id: Iabb379e91187e3e68ebcd4693fec35883b72b1f2
Reviewed-by: Michael Brüning <michael.bruning@qt.io>
Reviewed-by: Jüri Valdmann <juri.valdmann@qt.io>
Diffstat (limited to 'src/webenginewidgets/api')
-rw-r--r-- | src/webenginewidgets/api/qwebenginedownloaditem.cpp | 4 | ||||
-rw-r--r-- | src/webenginewidgets/api/qwebengineprofile.cpp | 30 | ||||
-rw-r--r-- | src/webenginewidgets/api/qwebengineprofile_p.h | 2 |
3 files changed, 23 insertions, 13 deletions
diff --git a/src/webenginewidgets/api/qwebenginedownloaditem.cpp b/src/webenginewidgets/api/qwebenginedownloaditem.cpp index f0f0958a5..deb92bfd3 100644 --- a/src/webenginewidgets/api/qwebenginedownloaditem.cpp +++ b/src/webenginewidgets/api/qwebenginedownloaditem.cpp @@ -660,10 +660,10 @@ QWebEngineDownloadItem::QWebEngineDownloadItem(QWebEngineDownloadItemPrivate *p, */ QWebEngineDownloadItem::~QWebEngineDownloadItem() { + // MEMO Items are owned by profile by default and will be destroyed on profile's destruction + // It's not safe to access profile in that case, so we rely on profile to clean up items if (!isFinished()) cancel(); - if (auto profileAdapter = d_ptr->profile->profileAdapter()) - profileAdapter->removeDownload(d_ptr->downloadId); } QT_END_NAMESPACE diff --git a/src/webenginewidgets/api/qwebengineprofile.cpp b/src/webenginewidgets/api/qwebengineprofile.cpp index 03ce5e0bc..0d12fdae1 100644 --- a/src/webenginewidgets/api/qwebengineprofile.cpp +++ b/src/webenginewidgets/api/qwebengineprofile.cpp @@ -175,13 +175,6 @@ QWebEngineProfilePrivate::~QWebEngineProfilePrivate() m_profileAdapter->removeClient(this); } - for (QWebEngineDownloadItem *download : qAsConst(m_ongoingDownloads)) { - if (download) - download->cancel(); - } - - m_ongoingDownloads.clear(); - if (m_profileAdapter != QtWebEngineCore::ProfileAdapter::defaultProfileAdapter()) delete m_profileAdapter; @@ -196,6 +189,23 @@ ProfileAdapter* QWebEngineProfilePrivate::profileAdapter() const void QWebEngineProfilePrivate::downloadDestroyed(quint32 downloadId) { m_ongoingDownloads.remove(downloadId); + if (m_profileAdapter) + m_profileAdapter->removeDownload(downloadId); +} + +void QWebEngineProfilePrivate::cleanDownloads() +{ + for (auto download : m_ongoingDownloads.values()) { + if (!download) + continue; + + if (!download->isFinished()) + download->cancel(); + + if (m_profileAdapter) + m_profileAdapter->removeDownload(download->id()); + } + m_ongoingDownloads.clear(); } void QWebEngineProfilePrivate::downloadRequested(DownloadItemInfo &info) @@ -219,6 +229,7 @@ void QWebEngineProfilePrivate::downloadRequested(DownloadItemInfo &info) QWebEngineDownloadItem *download = new QWebEngineDownloadItem(itemPrivate, q); m_ongoingDownloads.insert(info.id, download); + QObject::connect(download, &QWebEngineDownloadItem::destroyed, q, [id = info.id, this] () { downloadDestroyed(id); }); Q_EMIT q->downloadRequested(download); @@ -232,7 +243,6 @@ void QWebEngineProfilePrivate::downloadRequested(DownloadItemInfo &info) if (state == QWebEngineDownloadItem::DownloadRequested) { // Delete unaccepted downloads. info.accepted = false; - m_ongoingDownloads.remove(info.id); delete download; } } @@ -250,9 +260,6 @@ void QWebEngineProfilePrivate::downloadUpdated(const DownloadItemInfo &info) } download->d_func()->update(info); - - if (download->isFinished()) - m_ongoingDownloads.remove(info.id); } /*! @@ -301,6 +308,7 @@ QWebEngineProfile::QWebEngineProfile(QWebEngineProfilePrivate *privatePtr, QObje */ QWebEngineProfile::~QWebEngineProfile() { + d_ptr->cleanDownloads(); } /*! diff --git a/src/webenginewidgets/api/qwebengineprofile_p.h b/src/webenginewidgets/api/qwebengineprofile_p.h index 9ff8df849..4a76f457f 100644 --- a/src/webenginewidgets/api/qwebengineprofile_p.h +++ b/src/webenginewidgets/api/qwebengineprofile_p.h @@ -81,6 +81,8 @@ public: void downloadDestroyed(quint32 downloadId); + void cleanDownloads(); + void downloadRequested(DownloadItemInfo &info) override; void downloadUpdated(const DownloadItemInfo &info) override; |