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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-62665] Ensure `TransportLayerASIO::TimerService` can safely end the session</title>
                <link>https://jira.mongodb.org/browse/SERVER-62665</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Attempting to close SSL sockets through &lt;tt&gt;ASIOSession::end()&lt;/tt&gt; is not multi-thread safe. Here is a possible scenario where we can have a read after write data-race:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;Thread 1 is running SSL handshake, and attempts to emplace the established SSL socket into &lt;tt&gt;_sslSocket&lt;/tt&gt; (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/9be40f5388022d58326339092f6bb83466d8073e/src/mongo/transport/session_asio.cpp#L299&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;see here&lt;/a&gt;). This is done while holding the session lock.&lt;/li&gt;
	&lt;li&gt;Thread 2 calls into &lt;tt&gt;ASIOSession::end()&lt;/tt&gt;, which will attempt to get the underlying socket object by inquiring &lt;tt&gt;_sslSocket&lt;/tt&gt; multiple times (&lt;a href=&quot;https://github.com/mongodb/mongo/blob/9be40f5388022d58326339092f6bb83466d8073e/src/mongo/transport/session_asio.cpp#L149-L160&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here&lt;/a&gt;). All these accesses are done without holding the lock.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;We can serialize accesses to &lt;tt&gt;_sslSocket&lt;/tt&gt; by threads calling into &lt;tt&gt;ASIOSession::end()&lt;/tt&gt; and &lt;tt&gt;ASIOSession::handshakeSSLForEgressWithLock()&lt;/tt&gt; using a mutex. This should ensure the socket is not altered while running &lt;tt&gt;ASIOSession::end()&lt;/tt&gt;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1964424">SERVER-62665</key>
            <summary>Ensure `TransportLayerASIO::TimerService` can safely end the session</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="amirsaman.memaripour@mongodb.com">Amirsaman Memaripour</assignee>
                                    <reporter username="amirsaman.memaripour@mongodb.com">Amirsaman Memaripour</reporter>
                        <labels>
                            <label>servicearch-wfbf-day</label>
                    </labels>
                <created>Fri, 14 Jan 2022 18:32:15 +0000</created>
                <updated>Sun, 29 Oct 2023 21:44:05 +0000</updated>
                            <resolved>Wed, 26 Jan 2022 22:08:13 +0000</resolved>
                                                    <fixVersion>5.3.0</fixVersion>
                    <fixVersion>5.0.16</fixVersion>
                                    <component>Internal Code</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="5209204" author="xgen-internal-githook" created="Fri, 17 Feb 2023 22:43:18 +0000"  >&lt;p&gt;Author: &lt;/p&gt;
{&apos;name&apos;: &apos;Amirsaman Memaripour&apos;, &apos;email&apos;: &apos;amirsaman.memaripour@mongodb.com&apos;, &apos;username&apos;: &apos;samanca&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-62665&quot; title=&quot;Ensure `TransportLayerASIO::TimerService` can safely end the session&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-62665&quot;&gt;&lt;del&gt;SERVER-62665&lt;/del&gt;&lt;/a&gt; Ensure `TimerService` can safely end the session&lt;/p&gt;

&lt;p&gt;(cherry picked from commit 3f92a7d72d4fe92a12aeb0f35bb6110fbce8ceb9)&lt;br/&gt;
Branch: v5.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/2b9bf831dafe30835643e6c7db9b2555c6023670&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/2b9bf831dafe30835643e6c7db9b2555c6023670&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="5207810" author="uladzimir.makouski" created="Fri, 17 Feb 2023 15:28:25 +0000"  >&lt;p&gt;Reoccurring on v5.0 branch: &lt;a href=&quot;https://buildbaron.corp.mongodb.com/ui/#/bfg/BFG-1815688&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;BFG-1815688&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4316897" author="xgen-internal-githook" created="Wed, 26 Jan 2022 22:06:52 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Amirsaman Memaripour&apos;, &apos;email&apos;: &apos;amirsaman.memaripour@mongodb.com&apos;, &apos;username&apos;: &apos;samanca&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-62665&quot; title=&quot;Ensure `TransportLayerASIO::TimerService` can safely end the session&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-62665&quot;&gt;&lt;del&gt;SERVER-62665&lt;/del&gt;&lt;/a&gt; Ensure `TimerService` can safely end the session&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/3f92a7d72d4fe92a12aeb0f35bb6110fbce8ceb9&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/3f92a7d72d4fe92a12aeb0f35bb6110fbce8ceb9&lt;/a&gt;&lt;/p&gt;</comment>
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