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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-26910] provide a global lock around process creation in shell_utils_launcher</title>
                <link>https://jira.mongodb.org/browse/SERVER-26910</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The shell process management functions fork()/exec() in a multi-threaded program without sufficient guards to avoid leaking fds into children.  This causes deadlocks around the program registry (as we rely on file descriptor closure to break us out of dedicated child threads which read child output).&lt;/p&gt;

&lt;p&gt;The fix is to use a global lock to guard us from before the call to pipe() until after we close write side of the pipe in the parent.&lt;/p&gt;</description>
                <environment></environment>
        <key id="329466">SERVER-26910</key>
            <summary>provide a global lock around process creation in shell_utils_launcher</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="mira.carey@mongodb.com">Mira Carey</assignee>
                                    <reporter username="mira.carey@mongodb.com">Mira Carey</reporter>
                        <labels>
                            <label>platforms-hocr</label>
                    </labels>
                <created>Fri, 4 Nov 2016 17:29:19 +0000</created>
                <updated>Mon, 28 Nov 2016 22:32:26 +0000</updated>
                            <resolved>Mon, 7 Nov 2016 16:10:53 +0000</resolved>
                                                    <fixVersion>3.4.0-rc3</fixVersion>
                                    <component>Shell</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1428013" author="xgen-internal-githook" created="Mon, 7 Nov 2016 16:09:57 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;hanumantmk&apos;, u&apos;name&apos;: u&apos;Jason Carey&apos;, u&apos;email&apos;: u&apos;jcarey@argv.me&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26910&quot; title=&quot;provide a global lock around process creation in shell_utils_launcher&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26910&quot;&gt;&lt;del&gt;SERVER-26910&lt;/del&gt;&lt;/a&gt; lock around fork() in shell launcher&lt;/p&gt;

&lt;p&gt;The shell process management functions fork()/exec() in a multi-threaded&lt;br/&gt;
program without sufficient guards to avoid leaking fds into children.&lt;br/&gt;
This causes deadlocks around the program registry (as we rely on file&lt;br/&gt;
descriptor closure to break us out of dedicated child threads which read&lt;br/&gt;
child output).&lt;/p&gt;

&lt;p&gt;The fix is to use a global lock to guard us from before the call to&lt;br/&gt;
pipe() until after we close write side of the pipe in the parent.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ac465d21d85dfde7d55764cb714d8e235c22383f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ac465d21d85dfde7d55764cb714d8e235c22383f&lt;/a&gt;&lt;/p&gt;</comment>
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