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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-75021] Coverity analysis defect 135525: Dereference null return value</title>
                <link>https://jira.mongodb.org/browse/SERVER-75021</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Dereference null return value&lt;/p&gt;

&lt;p&gt; If the function actually returns a null value, a null pointer dereference will occur. Return value of function which returns null is dereferenced without checking&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/blob/6938e93030a13d16822510a404f3b06aabd70e38/src/mongo/db/s/shardsvr_check_metadata_consistency_participant_command.cpp#L100&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;/src/mongo/db/s/shardsvr_check_metadata_consistency_participant_command.cpp:100&lt;/a&gt;: NULL_RETURNS 135525 Dereferencing a pointer that might be &quot;nullptr&quot; &quot;*it&quot; when calling &quot;ns&quot;. (The dereference happens because this is a virtual function call.)&lt;/p&gt;</description>
                <environment></environment>
        <key id="2292004">SERVER-75021</key>
            <summary>Coverity analysis defect 135525: Dereference null return value</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="antonio.fuschetto@mongodb.com">Antonio Fuschetto</assignee>
                                    <reporter username="xgen-internal-coverity">Coverity Collector User</reporter>
                        <labels>
                            <label>coverity</label>
                    </labels>
                <created>Sun, 19 Mar 2023 13:04:11 +0000</created>
                <updated>Sun, 29 Oct 2023 21:24:40 +0000</updated>
                            <resolved>Wed, 29 Mar 2023 21:41:04 +0000</resolved>
                                                    <fixVersion>7.0.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5310640" author="xgen-internal-githook" created="Wed, 29 Mar 2023 21:40:25 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Antonio Fuschetto&apos;, &apos;email&apos;: &apos;antonio.fuschetto@mongodb.com&apos;, &apos;username&apos;: &apos;afuschetto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-75021&quot; title=&quot;Coverity analysis defect 135525: Dereference null return value&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-75021&quot;&gt;&lt;del&gt;SERVER-75021&lt;/del&gt;&lt;/a&gt; Coverity analysis defect 135525: Dereference null return value&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/cd6a60a933265227d24381543e8de79a3220e757&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/cd6a60a933265227d24381543e8de79a3220e757&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5309216" author="JIRAUSER1259062" created="Wed, 29 Mar 2023 14:46:28 +0000"  >&lt;p&gt;The defect raised by Coverity is based on the fact that the &lt;tt&gt;CollectionCatalog&lt;/tt&gt; iterator could refer to &lt;tt&gt;nullptr&lt;/tt&gt; when &lt;a href=&quot;https://github.com/10gen/mongo/blob/58a69ba924e2ca557bf1c208fed59fc948107bd0/src/mongo/db/catalog/collection_catalog.cpp#L423-L430&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;the end of the catalog is reached or the database doesn&apos;t match&lt;/a&gt;. It is therefore a case that should never occur in an usual iteration from the first to the last element.&lt;/p&gt;

&lt;p&gt;I noticed that in other cases there it has been implemented a check (e.g., &lt;a href=&quot;https://github.com/10gen/mongo/blob/58a69ba924e2ca557bf1c208fed59fc948107bd0/src/mongo/db/startup_recovery.cpp#L215-L219&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; and &lt;a href=&quot;https://github.com/10gen/mongo/blob/58a69ba924e2ca557bf1c208fed59fc948107bd0/src/mongo/db/catalog/catalog_control.cpp#L168-L172&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;) to keep Coverity happy.&lt;/p&gt;</comment>
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