[jira] [Commented] (SOLR-13198) NullPointerException in org.apache.solr.search.QParser.getParser

["Munendra S N (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-13198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16781795#comment-16781795 ] 

Munendra S N commented on SOLR-13198:
-------------------------------------

This duplicates SOLR-13187

> NullPointerException in org.apache.solr.search.QParser.getParser
> ----------------------------------------------------------------
>
>                 Key: SOLR-13198
>                 URL: https://issues.apache.org/jira/browse/SOLR-13198
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>    Affects Versions: master (9.0)
>         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
> 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]. The attached file ({{home.zip}}) gives the contents of folder {{/tmp/home}} that you will obtain by following the steps below:
> {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
> {noformat}
>            Reporter: Cesar Rodriguez
>            Priority: Major
>              Labels: diffblue, newdev
>         Attachments: home.zip
>
>
> Requesting the following URL causes Solr to return an HTTP 500 error response:
> {noformat}
> http://localhost:8983/solr/films/select?defType=xxx
> {noformat}
> The error response seems to be caused by the following uncaught exception:
> {noformat}
> java.lang.NullPointerException
> 	at org.apache.solr.search.QParser.getParser(QParser.java:367)
> 	at org.apache.solr.search.QParser.getParser(QParser.java:319)
> 	at org.apache.solr.handler.component.QueryComponent.prepare(QueryComponent.java:157)
> 	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 problem seems to be related to the input validation of parameter {{defType}}. Method {{org.apache.solr.search.QParser.getParser()}} retrieves a {{QParserPlugin}} at line 366, but the {{parserName}} is {{xxx}} and the returned plugin is {{null}}. Immediately after (line 367) this plugin is used, thus triggering the NPE. The {{null}} pointer should probably be checked before it's used.
> I think this is the example bug we described in the video attached to [this blog post|https://www.diffblue.com/blog/2018/12/19/diffblue-microservice-testing-a-sneak-peek-at-our-early-product-and-results?utm_source=solr-br]. We found this bug and 70 more like this using [Diffblue Microservices Testing|https://www.diffblue.com/labs/?utm_source=solr-br]. Check the blog post to learn more about this fuzz testing campaign we are running.



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