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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CFI] integer to pointer casts are unchecked"
href="https://bugs.llvm.org/show_bug.cgi?id=39966">39966</a>
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<th>Summary</th>
<td>[CFI] integer to pointer casts are unchecked
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>LLVM Codegen
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>eugeni.stepanov@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>struct A {
virtual void f();
};
void A::f() {}
int main() {
A *a = reinterpret_cast<A*>(0x1234);
A *b = reinterpret_cast<A*>(reinterpret_cast<void *>(0x1234));
(void)a;
(void)b;
}
The first cast, integer-to-A* does not generate a CFI check.
The second, through void*, does.
Built with
bin/clang++ -fsanitize=cfi -flto -fvisibility=hidden -fuse-ld=lld -S -emit-llvm</pre>
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