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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-17226] &apos;top&apos; command with 64MB result document can terminate server</title>
                <link>https://jira.mongodb.org/browse/SERVER-17226</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;A top command that produces a document that is ~64MB can terminate the server. See top.cpp below (and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-7459&quot; title=&quot;BSONObjBuilder and BSONArrayBuilder may throw (msgasserted) in destructor&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-7459&quot;&gt;&lt;del&gt;SERVER-7459&lt;/del&gt;&lt;/a&gt; and &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17224&quot; title=&quot;Aggregation pipeline with 64MB document can terminate server&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17224&quot;&gt;&lt;del&gt;SERVER-17224&lt;/del&gt;&lt;/a&gt;)&lt;/p&gt;

&lt;p&gt;db/stats/top.cpp&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;197    virtual bool run(OperationContext* txn, const string&amp;amp;, BSONObj&amp;amp; cmdObj, int, string&amp;amp; errmsg, BSONObjBuilder&amp;amp; result, bool fromRepl) {&lt;/span&gt;&lt;/pre&gt;
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						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;198    {&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;199        BSONObjBuilder b( result.subobjStart( &quot;totals&quot; ) );&lt;/span&gt;&lt;/pre&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;200        b.append( &quot;note&quot;, &quot;all times in microseconds&quot; );&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;If b.append throws, the destructor for b will call BSONObjBuilder::_done.  _done will throw an exception if result is 64MB because it will attempt to grow to accommodate EOO, which pushes it past the internal 64MB limit.&lt;/p&gt;</description>
                <environment></environment>
        <key id="183231">SERVER-17226</key>
            <summary>&apos;top&apos; command with 64MB result document can terminate server</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="9">Done</resolution>
                                        <assignee username="mathias@mongodb.com">Mathias Stearn</assignee>
                                    <reporter username="kamran.khan">Kamran K.</reporter>
                        <labels>
                            <label>28qa</label>
                    </labels>
                <created>Mon, 9 Feb 2015 02:23:49 +0000</created>
                <updated>Fri, 18 Sep 2015 22:40:07 +0000</updated>
                            <resolved>Fri, 13 Mar 2015 17:39:48 +0000</resolved>
                                    <version>3.0.0-rc8</version>
                                    <fixVersion>2.6.9</fixVersion>
                    <fixVersion>3.0.1</fixVersion>
                    <fixVersion>3.1.0</fixVersion>
                                    <component>Diagnostics</component>
                                        <votes>0</votes>
                                    <watches>4</watches>
                                                                                                                <comments>
                            <comment id="844480" author="xgen-internal-githook" created="Fri, 6 Mar 2015 01:28:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17224&quot; title=&quot;Aggregation pipeline with 64MB document can terminate server&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17224&quot;&gt;&lt;del&gt;SERVER-17224&lt;/del&gt;&lt;/a&gt; Reserve room for EOO byte when starting BSONObj building&lt;/p&gt;

&lt;p&gt;Since _done() is called from ~BSONObjBuilder we need to ensure that it cannot&lt;br/&gt;
fail. This prevents a double exception leading to a std::terminate call.&lt;/p&gt;

&lt;p&gt;This also resolves &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17226&quot; title=&quot;&amp;#39;top&amp;#39; command with 64MB result document can terminate server&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17226&quot;&gt;&lt;del&gt;SERVER-17226&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit a0db9321139e8da657638ddbe7e86d8bac9ea3cc)&lt;br/&gt;
Branch: v2.6&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b6a66a0c3494687c8b059d5f39de072a22e650a4&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b6a66a0c3494687c8b059d5f39de072a22e650a4&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="844381" author="xgen-internal-githook" created="Thu, 5 Mar 2015 22:58:16 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17224&quot; title=&quot;Aggregation pipeline with 64MB document can terminate server&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17224&quot;&gt;&lt;del&gt;SERVER-17224&lt;/del&gt;&lt;/a&gt; Reserve room for EOO byte when starting BSONObj building&lt;/p&gt;

&lt;p&gt;Since _done() is called from ~BSONObjBuilder we need to ensure that it cannot&lt;br/&gt;
fail. This prevents a double exception leading to a std::terminate call.&lt;/p&gt;

&lt;p&gt;This also resolves &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17226&quot; title=&quot;&amp;#39;top&amp;#39; command with 64MB result document can terminate server&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17226&quot;&gt;&lt;del&gt;SERVER-17226&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;(cherry picked from commit a0db9321139e8da657638ddbe7e86d8bac9ea3cc)&lt;br/&gt;
Branch: v3.0&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0cbcdfd5b4cd4961b448f1a35fd0d4ea19629b93&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0cbcdfd5b4cd4961b448f1a35fd0d4ea19629b93&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="844055" author="xgen-internal-githook" created="Thu, 5 Mar 2015 19:04:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;RedBeard0531&apos;, u&apos;name&apos;: u&apos;Mathias Stearn&apos;, u&apos;email&apos;: u&apos;mathias@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17224&quot; title=&quot;Aggregation pipeline with 64MB document can terminate server&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17224&quot;&gt;&lt;del&gt;SERVER-17224&lt;/del&gt;&lt;/a&gt; Reserve room for EOO byte when starting BSONObj building&lt;/p&gt;

&lt;p&gt;Since _done() is called from ~BSONObjBuilder we need to ensure that it cannot&lt;br/&gt;
fail. This prevents a double exception leading to a std::terminate call.&lt;/p&gt;

&lt;p&gt;This also resolves &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-17226&quot; title=&quot;&amp;#39;top&amp;#39; command with 64MB result document can terminate server&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-17226&quot;&gt;&lt;del&gt;SERVER-17226&lt;/del&gt;&lt;/a&gt;.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/a0db9321139e8da657638ddbe7e86d8bac9ea3cc&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/a0db9321139e8da657638ddbe7e86d8bac9ea3cc&lt;/a&gt;&lt;/p&gt;</comment>
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