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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-19040] WhereMatchExpression::shallowClone can leak memory during interruption</title>
                <link>https://jira.mongodb.org/browse/SERVER-19040</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;WhereMatchExpression::shallowClone allocates a new javascript scope object and re-parses the javascript from the original WhereMatchExpression.  Because the parsing involves entering the javascript engine, it may throw an exception to indicate that the operation has been interrupted. When this happens, the new match expression is leaked.&lt;/p&gt;

&lt;p&gt;It is not sufficient to delete the new expression and propagate the exception, because if the where expression object is a subexpression (say of an &quot;or&quot; expression), the bubbling exception will cause the parent to be leaked.  That is to say, shallowClone on match expressions is not exception safe.&lt;/p&gt;</description>
                <environment></environment>
        <key id="211667">SERVER-19040</key>
            <summary>WhereMatchExpression::shallowClone can leak memory during interruption</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="schwerin@mongodb.com">Andy Schwerin</assignee>
                                    <reporter username="schwerin@mongodb.com">Andy Schwerin</reporter>
                        <labels>
                            <label>UT</label>
                    </labels>
                <created>Thu, 18 Jun 2015 20:03:07 +0000</created>
                <updated>Wed, 25 Jan 2017 22:00:44 +0000</updated>
                            <resolved>Fri, 19 Jun 2015 12:36:26 +0000</resolved>
                                    <version>3.1.4</version>
                                    <fixVersion>3.1.5</fixVersion>
                                    <component>Querying</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="945391" author="xgen-internal-githook" created="Fri, 19 Jun 2015 12:59:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;andy10gen&apos;, u&apos;name&apos;: u&apos;Andy Schwerin&apos;, u&apos;email&apos;: u&apos;schwerin@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19040&quot; title=&quot;WhereMatchExpression::shallowClone can leak memory during interruption&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19040&quot;&gt;&lt;del&gt;SERVER-19040&lt;/del&gt;&lt;/a&gt; Fix uassert code&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0825bb2c83936d76d927bef681805b6fc686105d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0825bb2c83936d76d927bef681805b6fc686105d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="945360" author="xgen-internal-githook" created="Fri, 19 Jun 2015 12:35:53 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;andy10gen&apos;, u&apos;name&apos;: u&apos;Andy Schwerin&apos;, u&apos;email&apos;: u&apos;schwerin@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19040&quot; title=&quot;WhereMatchExpression::shallowClone can leak memory during interruption&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19040&quot;&gt;&lt;del&gt;SERVER-19040&lt;/del&gt;&lt;/a&gt; Do not let exceptions leak out of WhereMatchExpression::init.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/f1f528db6bbf170bd915c421ec93a66716234587&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/f1f528db6bbf170bd915c421ec93a66716234587&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="944750" author="schwerin" created="Thu, 18 Jun 2015 20:04:27 +0000"  >&lt;p&gt;This could hypothetically be a memory leak on the 3.0 branch, but it is likely to be rare and slow, given that it requires operations to be interrupted during the query parsing phase as opposed to the much longer query execution phase.&lt;/p&gt;</comment>
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            <issuekey id="167992">SERVER-16035</issuekey>
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