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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-23896] Don&apos;t allow mod by 0 in ExpressionMod::evaluateInternal()</title>
                <link>https://jira.mongodb.org/browse/SERVER-23896</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Fix 2 potential mod by 0 cases in ExpressionMod::evaluateInternal() &lt;/p&gt;

&lt;p&gt;&lt;b&gt;Issue 1&lt;/b&gt;&lt;br/&gt;
Division or modulo by zero results in undefined behavior.&lt;/p&gt;

&lt;p&gt;Defect 98886 (STATIC_C)&lt;br/&gt;
  Checker DIVIDE_BY_ZERO (subcategory none)&lt;br/&gt;
  File:  &lt;tt&gt;/src/mongo/db/pipeline/expression.cpp&lt;/tt&gt;&lt;br/&gt;
  Function &lt;tt&gt;mongo::ExpressionMod::evaluateInternal(mongo::Variables *) const&lt;/tt&gt;&lt;br/&gt;
    /src/mongo/db/pipeline/expression.cpp, line: 1996&lt;br/&gt;
    &lt;font color=&quot;red&quot;&gt;Assigning: &quot;rightInt&quot; = &quot;rhs.coerceToInt()&quot;. The value of &quot;rightInt&quot; is now 0.&lt;/font&gt; &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;
		&lt;tbody &gt;
				&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-top: 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;            int rightInt = rhs.coerceToInt();&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;    /src/mongo/db/pipeline/expression.cpp, line: 1997&lt;br/&gt;
    &lt;font color=&quot;red&quot;&gt;In expression &quot;left % rightInt&quot;, modulo by expression &quot;rightInt&quot; which may be zero has undefined behavior.&lt;/font&gt; &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;
		&lt;tbody &gt;
				&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-top: 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;            return Value(left % rightInt);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;

&lt;p&gt;&lt;b&gt;Issue 2&lt;/b&gt; &lt;br/&gt;
Division or modulo by zero results in undefined behavior.&lt;/p&gt;

&lt;p&gt;Defect 98887 (STATIC_C)&lt;br/&gt;
  Checker DIVIDE_BY_ZERO (subcategory none)&lt;br/&gt;
  File:  &lt;tt&gt;/src/mongo/db/pipeline/expression.cpp&lt;/tt&gt;&lt;br/&gt;
  Function &lt;tt&gt;mongo::ExpressionMod::evaluateInternal(mongo::Variables *) const&lt;/tt&gt;&lt;br/&gt;
    /src/mongo/db/pipeline/expression.cpp, line: 1990&lt;br/&gt;
    &lt;font color=&quot;red&quot;&gt;Assigning: &quot;rightLong&quot; = &quot;rhs.coerceToLong()&quot;. The value of &quot;rightLong&quot; is now 0.&lt;/font&gt; &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;
		&lt;tbody &gt;
				&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-top: 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;                long long rightLong = rhs.coerceToLong();&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;    /src/mongo/db/pipeline/expression.cpp, line: 1991&lt;br/&gt;
    &lt;font color=&quot;red&quot;&gt;In expression &quot;left % rightLong&quot;, modulo by expression &quot;rightLong&quot; which may be zero has undefined behavior.&lt;/font&gt; &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;
		&lt;tbody &gt;
				&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-top: 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;                return Value(left % rightLong);&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;</description>
                <environment></environment>
        <key id="282117">SERVER-23896</key>
            <summary>Don&apos;t allow mod by 0 in ExpressionMod::evaluateInternal()</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="james.wahlin@mongodb.com">James Wahlin</assignee>
                                    <reporter username="xgen-internal-coverity">Coverity Collector User</reporter>
                        <labels>
                    </labels>
                <created>Mon, 25 Apr 2016 12:51:06 +0000</created>
                <updated>Mon, 16 May 2016 19:50:24 +0000</updated>
                            <resolved>Mon, 9 May 2016 19:07:07 +0000</resolved>
                                                    <fixVersion>3.3.6</fixVersion>
                                    <component>Aggregation Framework</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="1259183" author="xgen-internal-githook" created="Mon, 9 May 2016 13:10:41 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;jameswahlin&apos;, u&apos;name&apos;: u&apos;James Wahlin&apos;, u&apos;email&apos;: u&apos;james.wahlin@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23896&quot; title=&quot;Don&amp;#39;t allow mod by 0 in ExpressionMod::evaluateInternal()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23896&quot;&gt;&lt;del&gt;SERVER-23896&lt;/del&gt;&lt;/a&gt; Add ExpressionMod tests for infinite dividend&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/b31ca56158bb6bf70f5037e2d2a9403fb4558c04&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/b31ca56158bb6bf70f5037e2d2a9403fb4558c04&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1259172" author="xgen-internal-githook" created="Mon, 9 May 2016 13:00:32 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;jameswahlin&apos;, u&apos;name&apos;: u&apos;James Wahlin&apos;, u&apos;email&apos;: u&apos;james.wahlin@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-23896&quot; title=&quot;Don&amp;#39;t allow mod by 0 in ExpressionMod::evaluateInternal()&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-23896&quot;&gt;&lt;del&gt;SERVER-23896&lt;/del&gt;&lt;/a&gt; Additional tests for ExpressionMod&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/0ffad2b98d934a748ea23f70c3688a3d059f5a24&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/0ffad2b98d934a748ea23f70c3688a3d059f5a24&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="282118">SERVER-23897</issuekey>
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