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  1. Qt
  2. QTBUG-29194

QImage crash when reading some bmp files

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P1: Critical
    • Resolution: Done
    • Affects Version/s: 4.8.4, 5.0.0
    • Fix Version/s: None
    • Component/s: Image formats
    • Labels:
      None
    • Environment:
      win7 64bits
      mingw32 4.6.2
    • Commits:
      af84313c622af880e95d461ea8b7dbca58d2dffa (5.0.2) 56b5acb2a858d0eb276ecc06d63caa7275f44dd7 (4.8.5)

      Description

      The QImage will crash when reading the images of the attachment bmp files.

      This link of useful debug message
      http://www.flickr.com/photos/92283971@N04/8386650746/in/photostream

      According to the guess from DerManu, may be some very unlikely coincidence
      where "red_mask >> red_shift" is -1, so that line divides by zero.

      codes :

      #include <QtCore>
      #include <QtGui>
       
      int main(int argc, char *argv[])
      {
          QApplication a(argc, argv);
      
          QString const prefix   = "C:/Qt/crash_pictures/";
          QStringList name;
          name << "rgb32-111110.bmp" << "rgb32bf.bmp" << "rgba32.bmp"for(int i = 0; i != name.size(); ++i){
              qDebug() << name[i];
              QImage read(prefix + name[i]); //crash at here
              qDebug() << read.isNull(); //can't reach this line
              qDebug() << read.format();
          }
      
          QLabel label;
          label.show();
         
          return a.exex();
      }
      

      I post the question on this forum too
      http://qt-project.org/forums/viewthread/23551/#110665

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            People

            • Assignee:
              rodal Samuel Rødal
              Reporter:
              stereomatching stereoMatching
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              Dates

              • Created:
                Updated:
                Resolved:

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