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    <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-71913] nullptr dereference in CollectionImpl::initFromExisting</title>
                <link>https://jira.mongodb.org/browse/SERVER-71913</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We use &lt;tt&gt;collection&lt;/tt&gt; &lt;a href=&quot;https://github.com/mongodb/mongo/blob/667dd077e5644c6c09a2cf4733dbb29a19f1ed04/src/mongo/db/catalog/collection_impl.cpp#L371-L372&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt; without checking if it&apos;s nullptr. But in &lt;tt&gt;CollectionCatalog::_createNewPITCollection&lt;/tt&gt; we &lt;a href=&quot;https://github.com/mongodb/mongo/blob/a76507d369a9f3ff7db64896763151b025072897/src/mongo/db/catalog/collection_catalog.cpp#L982&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;call initFromExisting with nullptr&lt;/a&gt;. This causes a segmentation fault. &lt;/p&gt;

&lt;p&gt;At the very least we should avoid dereferencing &lt;tt&gt;collection&lt;/tt&gt; if it&apos;s nullptr. &lt;/p&gt;

&lt;p&gt;But I think we probably actually shouldn&apos;t be calling a function &lt;tt&gt;initFromExisting&lt;/tt&gt; with something that&apos;s not existing. I was actually confused the first time I came across the call site because of that. So we could also instead have an `CollectionImpl::init` function that takes a read timestamp, and use that.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2204254">SERVER-71913</key>
            <summary>nullptr dereference in CollectionImpl::initFromExisting</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="gregory.wlodarek@mongodb.com">Gregory Wlodarek</assignee>
                                    <reporter username="matthew.saltz@mongodb.com">Matthew Saltz</reporter>
                        <labels>
                    </labels>
                <created>Tue, 6 Dec 2022 22:30:29 +0000</created>
                <updated>Sun, 29 Oct 2023 21:29:36 +0000</updated>
                            <resolved>Tue, 13 Dec 2022 22:57:29 +0000</resolved>
                                                    <fixVersion>6.3.0-rc0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5052573" author="xgen-internal-githook" created="Tue, 13 Dec 2022 21:02:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Gregory Wlodarek&apos;, &apos;email&apos;: &apos;gregory.wlodarek@mongodb.com&apos;, &apos;username&apos;: &apos;GWlodarek&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-71913&quot; title=&quot;nullptr dereference in CollectionImpl::initFromExisting&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-71913&quot;&gt;&lt;del&gt;SERVER-71913&lt;/del&gt;&lt;/a&gt; Fix nullptr dereference in CollectionImpl::initFromExisting()&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/50e6eef76ebb58672e0e23c3ac824491d3cb5a35&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/50e6eef76ebb58672e0e23c3ac824491d3cb5a35&lt;/a&gt;&lt;/p&gt;</comment>
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