sfx2: try to fix lifecycle of SfxOfficeDispatch

This can be created either from the global SfxApplication, or from a
SfxViewFrame.

Particularly in the latter case, the SfxDispatcher and SfxBindings
members are owned by SfxViewFrame, so in case that is destroyed, the
SfxOfficeDispatch must clear its pointers.

It looks like the member pointers are checked before access already
everywhere, so just listen at the SfxViewFrame.

Change-Id: If08825734e94dd54e32cb77546684fd583c336ec
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/118162
Tested-by: Michael Stahl <michael.stahl@allotropia.de>
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>
(cherry picked from commit 7cbd6d768d282077053c354254315f3dc89bf254)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/118176
Tested-by: Jenkins

4 files changed, 61 insertions, 1 deletions

diff --git a/framework/qa/cppunit/data/empty.fodp b/framework/qa/cppunit/data/empty.fodp
new file mode 100644
index 000000000000..3c2a4cf2cda5
--- /dev/null
+++ b/framework/qa/cppunit/data/empty.fodp
@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<office:document xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" office:version="1.2" office:mimetype="application/vnd.oasis.opendocument.presentation"><office:body><office:presentation><draw:page/></office:presentation></office:body></office:document>
diff --git a/framework/qa/cppunit/dispatchtest.cxx b/framework/qa/cppunit/dispatchtest.cxx
index 586c4af3b9b0..2f21a71b005e 100644
--- a/framework/qa/cppunit/dispatchtest.cxx
+++ b/framework/qa/cppunit/dispatchtest.cxx
@@ -15,6 +15,7 @@
 #include <com/sun/star/frame/DispatchHelper.hpp>
 #include <com/sun/star/frame/XDispatchProviderInterceptor.hpp>
 #include <com/sun/star/frame/XInterceptorInfo.hpp>
+#include <com/sun/star/util/URLTransformer.hpp>
 
 #include <comphelper/processfactory.hxx>
 #include <rtl/ref.hxx>
@@ -199,6 +200,37 @@ CPPUNIT_TEST_FIXTURE(DispatchTest, testInterception)
     // This was 1: MyInterceptor::queryDispatch() was called for .uno:Italic.
     CPPUNIT_ASSERT_EQUAL(0, pInterceptor->getUnexpected());
 }
+
+constexpr OUStringLiteral DATA_DIRECTORY = u"/framework/qa/cppunit/data/";
+
+CPPUNIT_TEST_FIXTURE(DispatchTest, testSfxOfficeDispatchDispose)
+{
+    // this test doesn't work with a new document because of aURL.Main check in SfxBaseController::dispatch()
+    mxComponent = loadFromDesktop(m_directories.getURLFromSrc(DATA_DIRECTORY) + "empty.fodp",
+                                  "com.sun.star.presentation.PresentationDocument");
+    uno::Reference<frame::XModel> xModel(mxComponent, uno::UNO_QUERY);
+    CPPUNIT_ASSERT(xModel.is());
+    uno::Reference<frame::XController> xController(xModel->getCurrentController());
+    CPPUNIT_ASSERT(xController.is());
+    uno::Reference<frame::XDispatchProvider> xFrame(xController->getFrame(), uno::UNO_QUERY);
+    CPPUNIT_ASSERT(xFrame.is());
+
+    uno::Reference<util::XURLTransformer> xParser(util::URLTransformer::create(mxComponentContext));
+    util::URL url;
+    url.Complete = xModel->getURL() + "#dummy";
+    xParser->parseStrict(url);
+
+    uno::Reference<frame::XDispatch> xDisp(xFrame->queryDispatch(url, "", 0));
+    CPPUNIT_ASSERT(xDisp.is());
+
+    mxComponent->dispose();
+
+    util::URL urlSlot;
+    urlSlot.Complete = "slot:5598";
+    xParser->parseStrict(urlSlot);
+    // crashed with UAF
+    xDisp->dispatch(urlSlot, {});
+}
 }
 
 CPPUNIT_PLUGIN_IMPLEMENT();
diff --git a/sfx2/inc/unoctitm.hxx b/sfx2/inc/unoctitm.hxx
index c180150325cc..7f6bf815e1f9 100644
--- a/sfx2/inc/unoctitm.hxx
+++ b/sfx2/inc/unoctitm.hxx
@@ -25,6 +25,7 @@
 #include <cppuhelper/interfacecontainer.hxx>
 #include <cppuhelper/weakref.hxx>
 
+#include <svl/lstner.hxx>
 #include <sfx2/ctrlitem.hxx>
 #include <osl/mutex.hxx>
 
@@ -101,7 +102,9 @@ public:
     SfxDispatcher*          GetDispatcher_Impl();
 };
 
-class SfxDispatchController_Impl : public SfxControllerItem
+class SfxDispatchController_Impl
+    : public SfxControllerItem
+    , public SfxListener
 {
     css::util::URL              aDispatchURL;
     SfxDispatcher*              pDispatcher;
@@ -126,6 +129,8 @@ public:
                                                     const css::util::URL& rURL );
                         virtual ~SfxDispatchController_Impl() override;
 
+    virtual void Notify(SfxBroadcaster& rBC, const SfxHint& rHint) override;
+
     static OUString getSlaveCommand( const css::util::URL& rURL );
 
     void                StateChanged( sal_uInt16 nSID, SfxItemState eState, const SfxPoolItem* pState, SfxSlotServer const * pServ );
diff --git a/sfx2/source/control/unoctitm.cxx b/sfx2/source/control/unoctitm.cxx
index 6228266abeb6..10e759e1eede 100644
--- a/sfx2/source/control/unoctitm.cxx
+++ b/sfx2/source/control/unoctitm.cxx
@@ -321,6 +321,27 @@ SfxDispatchController_Impl::SfxDispatchController_Impl(
         BindInternal_Impl( nSlot, pBindings );
         pBindings->LEAVEREGISTRATIONS();
     }
+    assert(pDispatcher);
+    assert(SfxApplication::Get()->GetAppDispatcher_Impl() == pDispatcher
+        || pDispatcher->GetFrame() != nullptr);
+    if (pDispatcher->GetFrame())
+    {
+        StartListening(*pDispatcher->GetFrame());
+    }
+    else
+    {
+        StartListening(*SfxApplication::Get());
+    }
+}
+
+void SfxDispatchController_Impl::Notify(SfxBroadcaster& rBC, SfxHint const& rHint)
+{
+    if (rHint.GetId() == SfxHintId::Dying)
+    {   // both pBindings and pDispatcher are dead if SfxViewFrame is dead
+        pBindings = nullptr;
+        pDispatcher = nullptr;
+        EndListening(rBC);
+    }
 }
 
 SfxDispatchController_Impl::~SfxDispatchController_Impl()