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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-22577] mmapv1 should not allow creation of database names containing $</title>
                <link>https://jira.mongodb.org/browse/SERVER-22577</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This was first discovered by &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=jonathan.abrahams&quot; class=&quot;user-hover&quot; rel=&quot;jonathan.abrahams&quot;&gt;jonathan.abrahams&lt;/a&gt; in the linked ticket.&lt;/p&gt;

&lt;p&gt;When we do an insert, a DatabaseCatalogEntry is created implicitly before validating the namespace string (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/c827c55f02b3a97f001f9935ffc5ddef0520b07a/src/mongo/db/commands/write_commands/batch_executor.cpp#L963&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;batch_executor.cpp&lt;/a&gt;). The insert would fail after the DatbaseCatalogEntry is created.&lt;/p&gt;

&lt;p&gt;For KVEngines, creating a DatabaseCatalogEntry is basically a noop (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/c827c55f02b3a97f001f9935ffc5ddef0520b07a/src/mongo/db/storage/kv/kv_storage_engine.cpp#L197&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;kv_storage_engine.cpp&lt;/a&gt;), so no harm is done.&lt;/p&gt;

&lt;p&gt;For mmapv1, a data file with an invalid name would be created in (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/c827c55f02b3a97f001f9935ffc5ddef0520b07a/src/mongo/db/storage/mmap_v1/mmap_v1_database_catalog_entry.cpp#L171&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;mmap_v1_database_catalog_entry.cpp&lt;/a&gt;). Subsequent calls to &lt;tt&gt;show dbs&lt;/tt&gt; would require getting the list of data files and this invalid one will show up.&lt;/p&gt;</description>
                <environment></environment>
        <key id="264757">SERVER-22577</key>
            <summary>mmapv1 should not allow creation of database names containing $</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="robert.guo@mongodb.com">Robert Guo</assignee>
                                    <reporter username="robert.guo@mongodb.com">Robert Guo</reporter>
                        <labels>
                    </labels>
                <created>Thu, 11 Feb 2016 16:31:34 +0000</created>
                <updated>Mon, 5 Dec 2016 13:22:58 +0000</updated>
                            <resolved>Tue, 29 Mar 2016 17:20:36 +0000</resolved>
                                    <version>3.3.1</version>
                                    <fixVersion>3.3.4</fixVersion>
                                    <component>Storage</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1218425" author="robert.guo" created="Tue, 29 Mar 2016 17:20:36 +0000"  >&lt;p&gt;Users will need to drop any databases containing a &quot;$&quot; in the database name before upgrading to 3.3.4 or above.&lt;/p&gt;</comment>
                            <comment id="1218420" author="xgen-internal-githook" created="Tue, 29 Mar 2016 17:18:29 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;guoyr&apos;, u&apos;name&apos;: u&apos;Robert Guo&apos;, u&apos;email&apos;: u&apos;robert.guo@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-22577&quot; title=&quot;mmapv1 should not allow creation of database names containing $&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-22577&quot;&gt;&lt;del&gt;SERVER-22577&lt;/del&gt;&lt;/a&gt; disallow creation of databases containing $ on mmapv1&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/e242b49373f0a9ee39f2b02f1a766a84c2c869b6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/e242b49373f0a9ee39f2b02f1a766a84c2c869b6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1211429" author="rassi@10gen.com" created="Tue, 22 Mar 2016 16:45:05 +0000"  >&lt;p&gt;Setting &quot;minor change&quot; for backwards compatibility, as databases created in this way will have to be dropped before the 3.2=&amp;gt;3.4 upgrade process can be started.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10320">
                    <name>Documented</name>
                                                                <inwardlinks description="is documented by">
                                        <issuelink>
            <issuekey id="336314">DOCS-9518</issuekey>
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                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="241439">SERVER-21696</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="91709">SERVER-10926</issuekey>
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