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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-44368] Client lock must protect OperationContext&apos;s LockState pointer</title>
                <link>https://jira.mongodb.org/browse/SERVER-44368</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The GlobalLockServerStatusSection assumes that it can lock a Client&apos;s mutex and then call &lt;a href=&quot;https://github.com/mongodb/mongo/blob/8010c51d3f1cc1020959f8b351f8242d141d42a3/src/mongo/db/stats/lock_server_status_section.cpp#L65&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;this&lt;/a&gt; function on that Client:&lt;br/&gt;
clientOpCtx-&amp;gt;lockState()-&amp;gt;getClientState()&lt;/p&gt;

&lt;p&gt;However, we routinely swap out or change the lock state pointer in an OperationContext without locking the mutex.  This can cause the server status section code to hit a null pointer, or read freed memory.  The fix should be to ensure that the Client mutex is locked before touching an OperationContext&apos;s _locker member.  Currently, there are two member functions that do this: setLockState() and swapLockState().&lt;/p&gt;</description>
                <environment></environment>
        <key id="987524">SERVER-44368</key>
            <summary>Client lock must protect OperationContext&apos;s LockState pointer</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="13201">Fixed</resolution>
                                        <assignee username="milkie@mongodb.com">Eric Milkie</assignee>
                                    <reporter username="milkie@mongodb.com">Eric Milkie</reporter>
                        <labels>
                    </labels>
                <created>Fri, 1 Nov 2019 17:44:14 +0000</created>
                <updated>Sun, 29 Oct 2023 22:15:28 +0000</updated>
                            <resolved>Mon, 4 Nov 2019 18:58:44 +0000</resolved>
                                                    <fixVersion>4.3.1</fixVersion>
                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="2516684" author="xgen-internal-githook" created="Mon, 4 Nov 2019 18:49:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;milkie&apos;, &apos;email&apos;: &apos;milkie@mongodb.com&apos;, &apos;name&apos;: &apos;Eric Milkie&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-44368&quot; title=&quot;Client lock must protect OperationContext&amp;#39;s LockState pointer&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-44368&quot;&gt;&lt;del&gt;SERVER-44368&lt;/del&gt;&lt;/a&gt; protect opCtx&apos;s Locker with Client lock&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ed610057b4a87cf96e3ba12bea8ae258a569906e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ed610057b4a87cf96e3ba12bea8ae258a569906e&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="856046">SERVER-42221</issuekey>
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