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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>4.5. Sufficient resources</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="Linux-PAM_ADG.html" title="The Linux-PAM Application Developers' Guide"><link rel="up" href="adg-security.html" title="Chapter 4. Security issues of Linux-PAM"><link rel="prev" href="adg-security-user-identity.html" title="4.4. The identity of the user"><link rel="next" href="adg-libpam_misc.html" title="Chapter 5. A library of miscellaneous helper functions"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">4.5. Sufficient resources</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="adg-security-user-identity.html">Prev</a> </td><th width="60%" align="center">Chapter 4.
Security issues of <span class="emphasis"><em>Linux-PAM</em></span>
</th><td width="20%" align="right"> <a accesskey="n" href="adg-libpam_misc.html">Next</a></td></tr></table><hr></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="adg-security-resources"></a>4.5. Sufficient resources</h2></div></div></div><p>
Care should be taken to ensure that the proper execution of an
application is not compromised by a lack of system resources. If an
application is unable to open sufficient files to perform its service,
it should fail gracefully, or request additional resources.
Specifically, the quantities manipulated by the <span class="citerefentry"><span class="refentrytitle">setrlimit</span>(2)</span> family of commands should be taken into consideration.
</p><p>
This is also true of conversation prompts. The application should not
accept prompts of arbitrary length with out checking for resource
allocation failure and dealing with such extreme conditions gracefully
and in a manner that preserves the PAM API. Such tolerance may be
especially important when attempting to track a malicious adversary.
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