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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - gets() not generating taint properly"
href="http://llvm.org/bugs/show_bug.cgi?id=16475">16475</a>
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<th>Summary</th>
<td>gets() not generating taint properly
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.2
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Static Analyzer
</td>
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<th>Assignee</th>
<td>kremenek@apple.com
</td>
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<th>Reporter</th>
<td>kmowery@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=10789" name="attach_10789" title="Patch for this bug, plus a regression test case">attachment 10789</a> <a href="attachment.cgi?id=10789&action=edit" title="Patch for this bug, plus a regression test case">[details]</a></span>
Patch for this bug, plus a regression test case
The llvm-3.2 taint engine does not properly taint the results of a gets() call.
Since none of the function arguments are tainted, ProgramStateRef
GenericTaintChecker::TaintPropagationRule::process() bails out early. gets() is
a special case, wherein stdin is implied.
The attached patch includes a fix for this issue and a regression test case.
This fix does slightly change the semantics of TaintPropagationRule, but I
think it maintains correctness.</pre>
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