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  1. Qt
  2. QTBUG-56165

Segfault in QSGRenderContext::initialize with QtWebEngine

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Details

    • 79121a0827df365468a02db20179d2c2d5ae720d

    Description

      Similarly to QTCREATORBUG-15992, an user of my application reported an immediate segfault here:

      #0  __strstr_sse2_unaligned () at ../sysdeps/x86_64/multiarch/strstr-sse2-unaligned.S:40
#1  0x00007fffe7a063ea in QSGRenderContext::initialize(QOpenGLContext*) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Quick.so.5
#2  0x00007fffe79fb842 in QSGEngine::initialize(QOpenGLContext*) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Quick.so.5
#3  0x00007fffed29f0f5 in ?? () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5WebEngineWidgets.so.5
#4  0x00007ffff003a71d in ?? () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#5  0x00007ffff003a83a in QOpenGLWidget::resizeEvent(QResizeEvent*) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#6  0x00007fffed29f369 in ?? () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5WebEngineWidgets.so.5
#7  0x00007ffff001b00e in QWidget::event(QEvent*) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#8  0x00007fffed29f5f9 in ?? () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5WebEngineWidgets.so.5
#9  0x00007fffeffd552c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#10 0x00007fffeffdc220 in QApplication::notify(QObject*, QEvent*) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#11 0x00007ffff0aa531e in sipQApplication::notify(QObject*, QEvent*) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/QtWidgets.so
#12 0x00007ffff5990ae0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Core.so.5
#13 0x00007ffff00134d2 in QWidgetPrivate::sendPendingMoveAndResizeEvents(bool, bool) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#14 0x00007ffff00179a6 in QWidgetPrivate::show_helper() () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#15 0x00007ffff00178f0 in QWidgetPrivate::showChildren(bool) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#16 0x00007ffff00179c2 in QWidgetPrivate::show_helper() () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#17 0x00007ffff001a635 in QWidget::setVisible(bool) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#18 0x00007fffed4cee54 in sipQWebEngineView::setVisible(bool) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/QtWebEngineWidgets.so
#19 0x00007ffff0017958 in QWidgetPrivate::showChildren(bool) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#20 0x00007ffff00179c2 in QWidgetPrivate::show_helper() () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#21 0x00007ffff001a635 in QWidget::setVisible(bool) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#22 0x00007ffff09b9f7c in sipQWidget::setVisible(bool) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/QtWidgets.so
#23 0x00007fffefffcd3f in QStackedLayout::setCurrentIndex(int) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#24 0x00007fffefffd2ba in QStackedLayout::insertWidget(int, QWidget*) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#25 0x00007ffff0168096 in QTabWidget::insertTab(int, QWidget*, QIcon const&, QString const&) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#26 0x00007ffff0168154 in QTabWidget::insertTab(int, QWidget*, QString const&) () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/Qt/lib/libQt5Widgets.so.5
#27 0x00007ffff0853648 in meth_QTabWidget_insertTab () from /home/teto/.local/lib/python3.5/site-packages/PyQt5/QtWidgets.so

      I plan to submit a fix for this, just thought I'd open a bug for completeness' sake and in case someone else stumbles upon the same issue.

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        For Gerrit Dashboard: QTBUG-56165
        # Subject Branch Project Status CR V
        171970,3 QSGRenderContext: Add null-checks for strings 5.6 qt/qtdeclarative Status: MERGED +2 0

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            srutledg Shawn Rutledge
            the compiler Florian Bruhin
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              Created:
              Updated:
              Resolved:

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