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    <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-11475] Recursion through role graph with user-defined roles causes seg faults</title>
                <link>https://jira.mongodb.org/browse/SERVER-11475</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;&lt;ins&gt;Try to create large chain of linked roles:&lt;/ins&gt;&lt;/p&gt;

&lt;p&gt;Role0 -&amp;gt; Role1 -&amp;gt; Role2 -&amp;gt; Role3 -&amp;gt; ..... -&amp;gt; RoleN&lt;/p&gt;

&lt;p&gt;At some value of N (depending on machine) seg fault will occur.  It seems stack is blown, from many recursive calls to RoleGraph::_recomputePrivilegeDataHelper.&lt;/p&gt;

&lt;p&gt;&lt;ins&gt;Try to create a cycle of linked roles:&lt;/ins&gt;&lt;/p&gt;

&lt;p&gt;Role0 -&amp;gt; Role1 -&amp;gt; Role2 -&amp;gt; Role3 -&amp;gt; ..... -&amp;gt; RoleN -&amp;gt; Role0&lt;/p&gt;

&lt;p&gt;Trying to create a large cycle (1600 roles) causes a segmentation fault.  We think that the stack blew up (too many recursive calls to search through the role graph?).  From the stack trace, it seems that 1396 calls to the RoleGraph::_recomputePrivilegeDataHelper went through before it blew the top.  &lt;/p&gt;

&lt;p&gt;Test that produced bugs is attached.&lt;/p&gt;</description>
                <environment></environment>
        <key id="96411">SERVER-11475</key>
            <summary>Recursion through role graph with user-defined roles causes seg faults</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="spencer@mongodb.com">Spencer Brody</assignee>
                                    <reporter username="samantha.ritter@mongodb.com">Samantha Ritter</reporter>
                        <labels>
                            <label>26qa</label>
                    </labels>
                <created>Wed, 30 Oct 2013 16:04:53 +0000</created>
                <updated>Fri, 27 Jan 2017 15:55:14 +0000</updated>
                            <resolved>Thu, 14 Nov 2013 04:03:24 +0000</resolved>
                                    <version>2.5.3</version>
                                    <fixVersion>2.5.4</fixVersion>
                                    <component>Security</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="456021" author="xgen-internal-githook" created="Thu, 14 Nov 2013 04:00:59 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;stbrody&apos;, u&apos;name&apos;: u&apos;Spencer T Brody&apos;, u&apos;email&apos;: u&apos;spencer@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-11475&quot; title=&quot;Recursion through role graph with user-defined roles causes seg faults&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-11475&quot;&gt;&lt;del&gt;SERVER-11475&lt;/del&gt;&lt;/a&gt; Change recomputePrivilegeData from recursive to iterative to avoid exhausting the stack&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b88b6e6c6e783d10bf3f73f4778f45cbe848cff6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b88b6e6c6e783d10bf3f73f4778f45cbe848cff6&lt;/a&gt;&lt;/p&gt;</comment>
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                                            <outwardlinks description="related to">
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            <issuekey id="349436">SERVER-27821</issuekey>
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                <attachments>
                            <attachment id="33214" name="actions.js" size="3020" author="samantha.ritter@mongodb.com" created="Wed, 30 Oct 2013 16:04:53 +0000"/>
                            <attachment id="33215" name="qa_341_chain_roles.js" size="2975" author="samantha.ritter@mongodb.com" created="Wed, 30 Oct 2013 16:04:54 +0000"/>
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