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    <title>MongoDB Jira</title>
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    <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-54832] [SBE] Coverity analysis defect 117733: Dereference null return value</title>
                <link>https://jira.mongodb.org/browse/SERVER-54832</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;
/src/mongo/db/query/sbe_stage_builder_index_scan.cpp:691: NULL_RETURNS 117733 Assigning: &quot;descriptor&quot; = &quot;nullptr&quot; return value from &quot;findIndexByName&quot;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1634934">SERVER-54832</key>
            <summary>[SBE] Coverity analysis defect 117733: Dereference null return value</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="xgen-internal-coverity">Coverity Collector User</reporter>
                        <labels>
                            <label>coverity</label>
                            <label>neweng</label>
                    </labels>
                <created>Fri, 26 Feb 2021 19:33:13 +0000</created>
                <updated>Sun, 29 Oct 2023 21:56:57 +0000</updated>
                            <resolved>Fri, 5 Mar 2021 22:01:27 +0000</resolved>
                                                    <fixVersion>4.9.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3650305" author="xgen-internal-githook" created="Fri, 5 Mar 2021 21:40:28 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;David Storch&apos;, &apos;email&apos;: &apos;david.storch@mongodb.com&apos;, &apos;username&apos;: &apos;dstorch&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54832&quot; title=&quot;[SBE] Coverity analysis defect 117733: Dereference null return value&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54832&quot;&gt;&lt;del&gt;SERVER-54832&lt;/del&gt;&lt;/a&gt; make SBE stage builder tassert() that index exists in catalog&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a6b5cdc3fa1722ea241a3d1ff9575a82e4a46081&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a6b5cdc3fa1722ea241a3d1ff9575a82e4a46081&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="3649632" author="david.storch" created="Fri, 5 Mar 2021 17:19:05 +0000"  >&lt;p&gt;I think the SBE stage builder can safely assume that &lt;tt&gt;findIndexByName()&lt;/tt&gt; should return a non-null descriptor. I will propose an improvement for this ticket which checks this explicitly with a &lt;tt&gt;tassert()&lt;/tt&gt; as Kyle suggests.&lt;/p&gt;</comment>
                            <comment id="3637713" author="kyle.suarez" created="Fri, 26 Feb 2021 19:36:00 +0000"  >&lt;p&gt;The actual implementation of &lt;tt&gt;findIndexByName()&lt;/tt&gt; can legitimately return &lt;tt&gt;nullptr&lt;/tt&gt;. Even if we think that case &quot;shouldn&apos;t happen&quot;, we should make that explicit with an invariant that &lt;tt&gt;descriptor&lt;/tt&gt; is non-null.&lt;/p&gt;</comment>
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