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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Warn if comparison result is passed as last argument to memcmp and friends (or when it's passed as size_t more generally?)"
href="http://llvm.org/bugs/show_bug.cgi?id=18297">18297</a>
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<th>Summary</th>
<td>Warn if comparison result is passed as last argument to memcmp and friends (or when it's passed as size_t more generally?)
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Frontend
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>nicolasweber@gmx.de
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>The motivation is to find bugs like
<a href="https://codereview.chromium.org/99423002/diff/1/net/third_party/nss/ssl/ssl3con.c">https://codereview.chromium.org/99423002/diff/1/net/third_party/nss/ssl/ssl3con.c</a>
at compile time:
- memcmp(spki->data, P256_SPKI_PREFIX, sizeof(P256_SPKI_PREFIX) != 0)) {
+ memcmp(spki->data, P256_SPKI_PREFIX, sizeof(P256_SPKI_PREFIX)) != 0) {
rnk suggested: " warn when passing comparison results to functions that expect
sizes (memset et al)?". Give that a try.</pre>
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