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  1. Qt
  2. QTBUG-56134

Potential null pointer dereference in MFStream

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2: Important
    • Resolution: Done
    • Affects Version/s: 5.6.0, 5.7.0, 5.8.0 Alpha
    • Fix Version/s: 5.6.3, 5.7.2, 5.8.0
    • Component/s: Multimedia
    • Labels:
      None
    • Commits:
      c6462eed99827154823e8e9ee07b8cf9311b518d

      Description

      There is a bug in MFStream::Seek regarding the parameter pqwCurrentPosition.
      Instead of checking against NULL, the function dereferences the pointer:

          if (*pqwCurrentPosition)
              *pqwCurrentPosition = pos;
      

      https://github.com/qt/qtmultimedia/blob/dev/src/plugins/wmf/mfstream.cpp#L239

      This will crash if NULL is passed, or fail to return the new position if the given pointer points to a zero-initialized value.

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            People

            Assignee:
            ylopes Yoann Lopes
            Reporter:
            jspohr jspohr
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              Dates

              Created:
              Updated:
              Resolved:

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