Uploaded image for project: 'Qt'
  1. Qt
  2. QTBUG-17400

crash in QtNetwork4.dll!QNetworkDiskCache::insert Line 238

    XMLWordPrintable

Details

    • Bug
    • Resolution: Done
    • P1: Critical
    • 4.8.7, 5.3.2
    • 4.7.1, 4.8.6, 5.3.0, 5.3.1
    • Network: Cache
    • None
    • Windows XP 64bit
    • Qt4: 753321eb459d2c988d66cc6c8905d75a0ba769bb, Qt5: 100ed2e91ead45f59639ec6b8aad16e6752818c4

    Description

      I'm getting an non deterministic crash in QtNetwork4.dll!QNetworkDiskCache::insert(...) Line 238

      call stack:

       	00000000()	
 	QtCore4.dll!operator<<(QDebug dbg={...}, const QObject * o=0x15bde5e8)  Line 3665 + 0x8 bytes	C++
>	QtNetwork4.dll!QNetworkDiskCache::insert(QIODevice * device=0x15bde5e8)  Line 238 + 0x42 bytes	C++
 	QtNetwork4.dll!QNetworkReplyImplPrivate::completeCacheSave()  Line 459	C++
 	QtNetwork4.dll!QNetworkReplyImplPrivate::finished()  Line 656	C++
 	QtNetwork4.dll!QNetworkAccessHttpBackend::replyFinished()  Line 774	C++
 	QtNetwork4.dll!QNetworkReplyImplPrivate::handleNotifications()  Line 360	C++
 	QtNetwork4.dll!QNetworkReplyImpl::event(QEvent * e=0x1c4dcc20)  Line 867 + 0x8 bytes	C++
 	QtGui4.dll!QApplicationPrivate::notify_helper(QObject * receiver=0x165bede8, QEvent * e=0x1c4dcc20)  Line 4446	C++
 	QtGui4.dll!QApplication::notify(QObject * receiver=0x165bede8, QEvent * e=0x1c4dcc20)  Line 4410 + 0x9 bytes	C++
 	ntdll.dll!_RtlFreeHeap@12()  + 0x7a bytes

      the program crashes in QDebug operator<<(QDebug dbg, const QObject *o):
      line 3665

          dbg.nospace() << o->metaObject()->className() << '(' << (void *)o;

      o->metaObject() causes the crash.

      I guess the object "o" (device) no longer exists.

      (first thought)
      Is it possible that 2 files with the same url
      were downloaded at the same time ?
      and one of them ended downloading with an error ?
      so
      in the:

      void QNetworkReplyImplPrivate::completeCacheSave()

      it was deleted with:

         networkCache()->remove(url);

      and it deleted the second one ?

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-39533 QtWebKit crashes with Flash (YouTube) on version 5.3

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          For Gerrit Dashboard: QTBUG-17400
          # Subject Branch Project Status CR V
          87669,2 network internals: do not try to cache a deleted entry 4.8 qt/qt Status: MERGED +2 0
          88207,2 network internals: do not try to cache a deleted entry 5.3 qt/qtbase Status: MERGED +2 0

          Activity

            People

              peter-har Peter Hartmann
              stawel Pawel Stawicki
              Votes:
              0 Vote for this issue
              Watchers:
              3 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews

                  There are no open Gerrit changes