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<a href="https://gitlab.com/rockdaboot">Tim Rühsen</a> created an issue:
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<p dir="auto">The following call sequence eats up memory while running in an (endless) loop:</p>
<pre class="code highlight js-syntax-highlight plaintext" lang="plaintext" v-pre="true"><code><span id="LC1" class="line" lang="plaintext">if (asn1_parser2tree("infile", &definitions, errorDescription) == ASN1_SUCCESS)</span>
<span id="LC2" class="line" lang="plaintext"> asn1_create_element(definitions, "TEST_TREE.Koko", &asn1_element);</span></code></pre>
<p dir="auto">with <code>infile</code> being</p>
<pre class="code highlight js-syntax-highlight plaintext" lang="plaintext" v-pre="true"><code><span id="LC1" class="line" lang="plaintext">TEST_TREE { }</span>
<span id="LC2" class="line" lang="plaintext">DEFINITIONS IMPLICIT TAGS ::=</span>
<span id="LC3" class="line" lang="plaintext">BEGIN</span>
<span id="LC4" class="line" lang="plaintext">Koko ::= SEQUENCE {</span>
<span id="LC5" class="line" lang="plaintext"> x ?L</span>
<span id="LC6" class="line" lang="plaintext">}</span>
<span id="LC7" class="line" lang="plaintext">END</span></code></pre>
<p dir="auto">Easiest way to reproduce:</p>
<ul dir="auto">
<li>git checkout tmp-fuzzing</li>
<li>./bootstrap && ./configure && make && cd fuzz</li>
<li>make check TESTS=libtasn1_encoding_fuzzer</li>
</ul>
<p dir="auto">You have to CTRL-C to stop it. It hangs in <code>_asn1_expand_identifier()</code>, each loop iteration running through the code block of <code>if (type_field (p->type) == ASN1_ETYPE_IDENTIFIER)</code>.</p>
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