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From "Johannes Kloos (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-13207) AIOOBE in calculateMinShouldMatch
Date Thu, 31 Jan 2019 14:23:00 GMT
Johannes Kloos created SOLR-13207:
-------------------------------------

             Summary: AIOOBE in calculateMinShouldMatch
                 Key: SOLR-13207
                 URL: https://issues.apache.org/jira/browse/SOLR-13207
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
         Environment: h1. Steps to reproduce

* Use a Linux machine.
* Build commit {{ea2c8ba}} of Solr as described in the section below.
* Build the films collection as described below.
* Start the server using the command {{./bin/solr start -f -p 8983 -s /tmp/home}}
* Request the URL given in the bug description.

h1. Compiling the server

{noformat}
git clone https://github.com/apache/lucene-solr
cd lucene-solr
git checkout ea2c8ba
ant compile
cd solr
ant server
{noformat}

h1. Building the collection and reproducing the bug

We followed [Exercise 2|http://lucene.apache.org/solr/guide/7_5/solr-tutorial.html#exercise-2]
from the [Solr Tutorial|http://lucene.apache.org/solr/guide/7_5/solr-tutorial.html].

{noformat}
mkdir -p /tmp/home
echo '<?xml version="1.0" encoding="UTF-8" ?><solr></solr>' > /tmp/home/solr.xml
{noformat}

In one terminal start a Solr instance in foreground:
{noformat}
./bin/solr start -f -p 8983 -s /tmp/home
{noformat}

In another terminal, create a collection of movies, with no shards and no replication, and
initialize it:

{noformat}
bin/solr create -c films
curl -X POST -H 'Content-type:application/json' --data-binary '{"add-field": {"name":"name",
"type":"text_general", "multiValued":false, "stored":true}}' http://localhost:8983/solr/films/schema
curl -X POST -H 'Content-type:application/json' --data-binary '{"add-copy-field" : {"source":"*","dest":"_text_"}}'
http://localhost:8983/solr/films/schema
./bin/post -c films example/films/films.json
curl -v “URL_BUG”
{noformat}

Please check the issue description below to find the “URL_BUG” that will allow you to
reproduce the issue reported.

            Reporter: Johannes Kloos


Requesting the following URL causes Solr to return an HTTP 500 error response:

{noformat}
http://localhost:8983/solr/films/select?mm=%3C&defType=edismax&q=fq=field(id,1)
{noformat}

The error response seems to be caused by the following uncaught exception:

{noformat}
java.lang.ArrayIndexOutOfBoundsException: 0
at org.apache.solr.util.SolrPluginUtils.calculateMinShouldMatch(SolrPluginUtils.java:683)
at org.apache.solr.util.SolrPluginUtils.setMinShouldMatch(SolrPluginUtils.java:641)
at org.apache.solr.util.SolrPluginUtils.setMinShouldMatch(SolrPluginUtils.java:660)
at org.apache.solr.search.ExtendedDismaxQParser.parseOriginalQuery(ExtendedDismaxQParser.java:415)
at org.apache.solr.search.ExtendedDismaxQParser.parse(ExtendedDismaxQParser.java:173)
at org.apache.solr.search.QParser.getQuery(QParser.java:173)
at org.apache.solr.handler.component.QueryComponent.prepare(QueryComponent.java:158)
at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:272)
at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:2559)

{noformat}

The mm parameter is given as ‘<’. It is (after some string mangling) split into sub-strings
separated by ‘<’, putattively giving the left-hand and right-hand argument of the operator.
In the example, there are no such arguments, so the resulting array “parts” is empty (cf.
String.split documentation). But we immediately try to access parts[0], leading to an AIOOBE.

To set up an environment to reproduce this bug, follow the description in the ‘Environment’
field.

We automatically found this issue and ~70 more like this using [Diffblue Microservices Testing|https://www.diffblue.com/labs/?utm_source=solr-br].
Find more information on this [fuzz testing campaign|https://www.diffblue.com/blog/2018/12/19/diffblue-microservice-testing-a-sneak-peek-at-our-early-product-and-results?utm_source=solr-br].




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