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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Incorrect taint of arrays / pointers"
href="https://llvm.org/bugs/show_bug.cgi?id=23551">23551</a>
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<th>Summary</th>
<td>Incorrect taint of arrays / pointers
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Static Analyzer
</td>
</tr>
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<th>Assignee</th>
<td>kremenek@apple.com
</td>
</tr>
<tr>
<th>Reporter</th>
<td>svadim94@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>There are problems in GenericTaintChecker.cpp checker:
#include <stdio.h>
int main()
{
char buf[256];
scanf("%s", buf);
FILE *f = fopen(buf, "r"); // buf is tainted but no warnings generate
}
However in other situation checker works properly:
#include <stdio.h>
int main()
{
char buf[256];
scanf("%s", buf);
FILE *f = fopen((char *)buf[0], "r"); // Warning: tainted!
}
Buuut:
#include <stdio.h>
int main()
{
char buf[256];
scanf("%s", buf);
FILE *f = fopen((char *)buf[1], "r"); // Not working again!
}
Any ideas, except for taint pointers itself? :)</pre>
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