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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-15921] Segfault trying to take a resource locking in the kv catalog</title>
                <link>https://jira.mongodb.org/browse/SERVER-15921</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;In KVCatalog::_findEntry we have:&lt;/p&gt;

&lt;p&gt;boost::scoped_ptr&amp;lt;Lock::ResourceLock&amp;gt; rLk;&lt;br/&gt;
if (!_isRsThreadSafe)&lt;br/&gt;
       rLk.reset(new Lock::ResourceLock(opCtx-&amp;gt;lockState(), catalogRID));&lt;/p&gt;

&lt;p&gt;But during KVStorageEngine::finishInit(), opCtx-&amp;gt;lockState() is null, so we crash.&lt;/p&gt;

&lt;p&gt;I think the right thing to do is not take a lock at all in this case because if we don&apos;t have a lock state we&apos;re probably in startup (or other inherently single-threaded block)&lt;/p&gt;</description>
                <environment></environment>
        <key id="167018">SERVER-15921</key>
            <summary>Segfault trying to take a resource locking in the kv catalog</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="john.esmet@gmail.com">John Esmet</reporter>
                        <labels>
                    </labels>
                <created>Mon, 3 Nov 2014 16:57:35 +0000</created>
                <updated>Wed, 19 Nov 2014 16:26:50 +0000</updated>
                            <resolved>Tue, 4 Nov 2014 18:00:18 +0000</resolved>
                                    <version>2.7.8</version>
                                    <fixVersion>2.8.0-rc0</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="755830" author="xgen-internal-githook" created="Tue, 4 Nov 2014 17:59:33 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;esmet&apos;, u&apos;name&apos;: u&apos;John Esmet&apos;, u&apos;email&apos;: u&apos;john.esmet@gmail.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-15921&quot; title=&quot;Segfault trying to take a resource locking in the kv catalog&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-15921&quot;&gt;&lt;del&gt;SERVER-15921&lt;/del&gt;&lt;/a&gt; Check for lock state in kv catalog&lt;/p&gt;

&lt;p&gt;Check if we have a lock state before taking any locks in the kv catalog.&lt;br/&gt;
The assumption is that no lock state means we are in an inherently&lt;br/&gt;
single-threaded code block (like startup).&lt;/p&gt;

&lt;p&gt;Signed-off-by: Matt Kangas &amp;lt;matt.kangas@mongodb.com&amp;gt;&lt;br/&gt;
Closes #855&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/8f1f165734da24f5b44ae468a59b0cb9746dfec7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/8f1f165734da24f5b44ae468a59b0cb9746dfec7&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="755116" author="john.esmet@gmail.com" created="Mon, 3 Nov 2014 21:49:24 +0000"  >&lt;p&gt;Here&apos;s the associated PR - &lt;a href=&quot;https://github.com/mongodb/mongo/pull/855&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/pull/855&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;I think it&apos;s possible this fix is short sighted (maybe the caller should just have a lock state instead of assuming that no lock state means no locks are necessary?)&lt;/p&gt;

&lt;p&gt;I&apos;ll let you be the judge&lt;/p&gt;</comment>
                            <comment id="755093" author="eliot" created="Mon, 3 Nov 2014 21:32:02 +0000"  >&lt;p&gt;if you have a patch could help &lt;img class=&quot;emoticon&quot; src=&quot;https://jira.mongodb.org/images/icons/emoticons/smile.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
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