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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[CDRIVER-1043] bson_strnlen is off by one</title>
                <link>https://jira.mongodb.org/browse/CDRIVER-1043</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;bson_strnlen returns strnlen if available, otherwise a custom implementation of strnlen. Ever since it was first written, bson_strnlen&apos;s custom implementation has returned a value 1 greater than strnlen.&lt;/p&gt;

&lt;p&gt;Furthermore, due to a misspelled ifdef (&lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-1041&quot; title=&quot;Build 1.3.0 failure on sparc: strnlen undefined&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-1041&quot;&gt;&lt;del&gt;CDRIVER-1041&lt;/del&gt;&lt;/a&gt;), bson_strnlen &lt;b&gt;always&lt;/b&gt; uses its custom implementation instead of using strnlen when available.&lt;/p&gt;

&lt;p&gt;This was undetected because:&lt;/p&gt;

&lt;p&gt;1. bson_strnlen is not directly tested&lt;br/&gt;
2. It was only used in _mongoc_ssl_check_cert to check if a hostname has internal nils: &lt;tt&gt;bson_strnlen (name, name_length)&lt;/tt&gt;. Since the max length was already calculated, the off-by-one error had no effect.&lt;br/&gt;
3. I mistakenly used standard strnlen instead of bson_strnlen in new cursor code (also reported in &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-1041&quot; title=&quot;Build 1.3.0 failure on sparc: strnlen undefined&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-1041&quot;&gt;&lt;del&gt;CDRIVER-1041&lt;/del&gt;&lt;/a&gt;).&lt;/p&gt;</description>
                <environment></environment>
        <key id="242953">CDRIVER-1043</key>
            <summary>bson_strnlen is off by one</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="jesse@mongodb.com">A. Jesse Jiryu Davis</assignee>
                                    <reporter username="jesse@mongodb.com">A. Jesse Jiryu Davis</reporter>
                        <labels>
                    </labels>
                <created>Wed, 9 Dec 2015 13:37:32 +0000</created>
                <updated>Mon, 18 Jan 2016 16:59:23 +0000</updated>
                            <resolved>Wed, 9 Dec 2015 13:43:43 +0000</resolved>
                                                    <fixVersion>1.3.1</fixVersion>
                                    <component>libbson</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1109302" author="xgen-internal-githook" created="Wed, 9 Dec 2015 13:43:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;ajdavis&apos;, u&apos;name&apos;: u&apos;A. Jesse Jiryu Davis&apos;, u&apos;email&apos;: u&apos;jesse@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-1043&quot; title=&quot;bson_strnlen is off by one&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-1043&quot;&gt;&lt;del&gt;CDRIVER-1043&lt;/del&gt;&lt;/a&gt; bson_strnlen is off by one&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/libbson/commit/12750146601dff97493675e4d4b85a7d5c03d6e1&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/libbson/commit/12750146601dff97493675e4d4b85a7d5c03d6e1&lt;/a&gt;&lt;/p&gt;</comment>
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