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    <title>MongoDB Jira</title>
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    <language>en-us</language>    <build-info>
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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-27643] Stack locator can return invalid stack size when stack size ulimit is unlimited</title>
                <link>https://jira.mongodb.org/browse/SERVER-27643</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The stack locator calls pthread_getattr_np and then pthread_attr_getstack to determine how big the stack is. With glibc, that means that if the stack ulimit is set to &quot;unlimited&quot; it will try to determine the size of the stack as though it were UINT64_MAX which can cause the stack size to be reported as a negative number. This can cause the javascript engine to set its internal stack limit to a negative number which will prevent the creation of any new javascript scopes - although this only applies to main(), all our other threads either have an implicit stack size of 2MB or an explicit stack size of 1MB depending on how they were created.&lt;/p&gt;</description>
                <environment></environment>
        <key id="344578">SERVER-27643</key>
            <summary>Stack locator can return invalid stack size when stack size ulimit is unlimited</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="jonathan.reams@mongodb.com">Jonathan Reams</assignee>
                                    <reporter username="jonathan.reams@mongodb.com">Jonathan Reams</reporter>
                        <labels>
                    </labels>
                <created>Wed, 11 Jan 2017 21:40:42 +0000</created>
                <updated>Mon, 16 Apr 2018 16:00:21 +0000</updated>
                            <resolved>Thu, 2 Feb 2017 18:14:24 +0000</resolved>
                                                    <fixVersion>3.4.15</fixVersion>
                    <fixVersion>3.5.3</fixVersion>
                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1865274" author="xgen-internal-githook" created="Mon, 16 Apr 2018 15:58:38 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Jonathan Reams&apos;, &apos;email&apos;: &apos;jbreams@mongodb.com&apos;, &apos;username&apos;: &apos;jbreams&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27643&quot; title=&quot;Stack locator can return invalid stack size when stack size ulimit is unlimited&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27643&quot;&gt;&lt;del&gt;SERVER-27643&lt;/del&gt;&lt;/a&gt; Use correct types when setting javascript stack limit&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 611b493648e64678fccac94373707e12e3904e91)&lt;br/&gt;
Branch: v3.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/90ef0561dd788959e246321112942e78282fd87d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/90ef0561dd788959e246321112942e78282fd87d&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1491088" author="xgen-internal-githook" created="Thu, 2 Feb 2017 18:15:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;jbreams&apos;, u&apos;name&apos;: u&apos;Jonathan Reams&apos;, u&apos;email&apos;: u&apos;jbreams@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-27643&quot; title=&quot;Stack locator can return invalid stack size when stack size ulimit is unlimited&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-27643&quot;&gt;&lt;del&gt;SERVER-27643&lt;/del&gt;&lt;/a&gt; Use correct types when setting javascript stack limit&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/611b493648e64678fccac94373707e12e3904e91&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/611b493648e64678fccac94373707e12e3904e91&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1490037" author="jonathan.reams@10gen.com" created="Wed, 1 Feb 2017 17:18:18 +0000"  >&lt;p&gt;The fix for this is actually much simpler than I first thought. We just need to make sure we&apos;re using the right types when using the stack locator. If we make sure it&apos;s size_t all the way through, the very very large stack size returned by the StackLocator seems benign. There&apos;s a new code review to fix our use of the stacklocator in our javascript integration - which is where this bug first popped up.&lt;/p&gt;</comment>
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