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  1. Lucene - Core
  2. LUCENE-8075

Possible null pointer dereference in core/src/java/org/apache/lucene/codecs/blocktree/IntersectTermsEnum.java

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 7.1
    • Fix Version/s: 7.3, 8.0
    • Component/s: core/codecs
    • Labels:
    • Lucene Fields:
      New

      Description

      Possible null pointer dereference in core/src/java/org/apache/lucene/codecs/blocktree/IntersectTermsEnum.java.
      at line 119. The fr.index may be NULL. This result is based on static analysis tools and the details are shown below:
      *

      106: if (fr.index == null) {
      
      107:      fstReader = null;  // fr.index is Known NULL here.
          } else {
            fstReader = fr.index.getBytesReader();
          }
      
          // TODO: if the automaton is "smallish" we really
          // should use the terms index to seek at least to
          // the initial term and likely to subsequent terms
          // (or, maybe just fallback to ATE for such cases).
          // Else the seek cost of loading the frames will be
          // too costly.
      
      119:    final FST.Arc<BytesRef> arc = fr.index.getFirstArc(arcs[0]); 
      //  fr.index is dereferenced here and fr.index can be NULL if 107 is arrived.
      

      *
      It is not sure if fr.index can be NULL in runtime.
      We think it is reasonable to fix it by a test if fr.index is NULL and an error handling.

      --------------
      Please Refer to "Trusted Operating System and System Assurance Working Group, TCA, Institute of Software, Chinese Academy of Sciences" in the acknowledgement if applicable.

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              • Assignee:
                Unassigned
                Reporter:
                bingosxs Xiaoshan Sun
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