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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Miscompilation leads to system out to memory"
href="https://bugs.llvm.org/show_bug.cgi?id=46262">46262</a>
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<th>Summary</th>
<td>Miscompilation leads to system out to memory
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>release blocker
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>changochen1@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>We found a bug that can exhaust the memory of the os.
POC:
---
int a;
int b() {
int c;
short d, *e = b();
switch (c)
do {
case 3:
if (a)
e = &d;
case 6:
e++;
} while (e);
return 1;
}
---
Cmdline:
---
clang-11 -cc1 -emit-obj -O3 -o /dev/null -x c poc.c
---
Clang-version:
---
clang version 11.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
641d5ac4d1965990fcf981f153369b038816cd16)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/xxxx/llvm-project/build_clean/bin
---
The compilation exhausts the 256G on my system. Tested on the latest
update-to-date master branch of clang.</pre>
</div>
</p>
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