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Check integer overflow in resolveObjectsInStream

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Fixes a crash found by fuzzing.
This commit is contained in:
Dean Scarff 2020-07-02 13:56:09 +10:00 committed by Jay Berkenbilt
parent 9a3791c53b
commit 153060a0c5
1 changed files with 2 additions and 2 deletions
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4
libqpdf/QPDF.cc
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@ -2151,8 +2151,8 @@ QPDF::resolveObjectsInStream(int obj_stream_number)
}
int num = QUtil::string_to_int(tnum.getValue().c_str());
int offset = QUtil::string_to_int(toffset.getValue().c_str());
offsets[num] = offset + first;
long long offset = QUtil::string_to_int(toffset.getValue().c_str());
offsets[num] = QIntC::to_int(offset + first);
}
// To avoid having to read the object stream multiple times, store