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  1. Qt
  2. QTBUG-102274

QBuffer silent data corruption on seek() past INT_MAX (32-bit only)

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    • 5
    • 4bc85b9850 (qt/qtbase/dev) 4bc85b9850 (qt/tqtc-qtbase/dev) ceb236954a (qt/qtbase/6.2) 2a6bd54cfa (qt/qtbase/6.3) ceb236954a (qt/tqtc-qtbase/6.2) 2a6bd54cfa (qt/tqtc-qtbase/6.3) da52a120dc (qt/tqtc-qtbase/5.15)
    • Team B Foundation Sprint 55

    Description

      When {{seek()}}ing a QBuffer to more than INT_MAX, the seek() call duly fails, but will have changed the underlying QByteArray:

      QBuffer buffer;
buffer.open(QIODevice::WriteOnly);
assert(buffer.buffer().size() == 0);
assert(!buffer.seek(qint64(INT_MAX) + 1)); // SUCCEEDS
assert(buffer.buffer().size() == 0); // FAILS

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            mmutz Marc Mutz
            mmutz Marc Mutz
            Vladimir Minenko Vladimir Minenko
            Alex Blasche Alex Blasche
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            Dates

              Created:
              Updated:
              Resolved: