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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-70379] Coverity analysis defect 128813: Wrapper object use after free</title>
                <link>https://jira.mongodb.org/browse/SERVER-70379</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Wrapper object use after free&lt;/p&gt;

&lt;p&gt; A use after free bug would occur if the internal pointer is used. An internal pointer of a wrapper object remains available after the object is freed&lt;br/&gt;
/src/mongo/db/repl/tenant_file_importer_service.cpp:241: WRAPPER_ESCAPE 128813 Calling &quot;get&quot; which extracts wrapped state from local &quot;opCtx&quot;.&lt;br/&gt;
/src/mongo/db/repl/tenant_file_importer_service.cpp:241: WRAPPER_ESCAPE 128813 The internal representation of local &quot;opCtx&quot; escapes into &quot;this-&amp;gt;_opCtx&quot;, but is destroyed when it exits scope.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2154895">SERVER-70379</key>
            <summary>Coverity analysis defect 128813: Wrapper object use after free</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="christopher.caplinger@mongodb.com">Christopher Caplinger</assignee>
                                    <reporter username="xgen-internal-coverity">Coverity Collector User</reporter>
                        <labels>
                            <label>coverity</label>
                    </labels>
                <created>Sat, 8 Oct 2022 15:37:35 +0000</created>
                <updated>Sat, 8 Apr 2023 01:49:33 +0000</updated>
                            <resolved>Wed, 2 Nov 2022 18:52:32 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="4949482" author="christopher.caplinger" created="Wed, 2 Nov 2022 18:52:32 +0000"  >&lt;p&gt;false positive. as written, this can&apos;t actually cause a use after free.&lt;/p&gt;</comment>
                            <comment id="4891957" author="suganthi.mani" created="Mon, 10 Oct 2022 18:59:42 +0000"  >&lt;p&gt;yes, we conditionally reset. And, I still think it&apos;s false positive. We reset the _opCtx only if the _opCtx&apos;s getOpID() matches localOpCtx&apos;s getOpID()&lt;/p&gt;</comment>
                            <comment id="4891929" author="milkie" created="Mon, 10 Oct 2022 18:53:53 +0000"  >&lt;p&gt;I think the problem is that the ON_BLOCK_EXIT you linked does not &lt;b&gt;definitively&lt;/b&gt; reset the _opCtx pointer.  It conditionally does it.&lt;/p&gt;</comment>
                            <comment id="4891885" author="suganthi.mani" created="Mon, 10 Oct 2022 18:44:00 +0000"  >&lt;p&gt;This seems to be a false positive as we have this &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/repl/tenant_file_importer_service.cpp#L228&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;ON_BLOCK_EXIT() logic&lt;/a&gt; which resets the _opCtx before the local opCtx goes out of scope.&lt;/p&gt;</comment>
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