<html>
<head>
<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Method Verifier::visitAliaseeSubExpr stack overflows"
href="https://llvm.org/bugs/show_bug.cgi?id=24644">24644</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Method Verifier::visitAliaseeSubExpr stack overflows
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>kschimpf@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=14800" name="attach_14800" title="Assembly file">attachment 14800</a> <a href="attachment.cgi?id=14800&action=edit" title="Assembly file">[details]</a></span>
Assembly file
See attached for test case (<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Need to add product version numbers"
href="show_bug.cgi?id=1">bug1</a>.ll).
This bug was found using afl-fuzz.
To see error: build llvm-as using the following steps:
% cmake -GNinja -DLLVM_USE_SANITIZER=Address -DLLVM_USE_SANITIZE_COVERAGE=YES
-DCMAKE_BUILD_TYPE=Release /path/to/llvm
% ninja bin/llvm-as
Then run:
bin/llvm-as <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Need to add product version numbers"
href="show_bug.cgi?id=1">bug1</a>.ll -o /dev/null
The output is:
ASAN:DEADLYSIGNAL
=================================================================
==24746==ERROR: AddressSanitizer: stack-overflow on address 0x7ffef9709fa0 (pc
0x000000b0c4e5 bp 0x7ffef970a090 sp 0x7ffef9709fa0 T0)
#0 0xb0c4e4 in (anonymous
namespace)::Verifier::VerifyConstantExprBitcastType(llvm::ConstantExpr const*)
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:1500
#1 0xb48d23 in (anonymous
namespace)::Verifier::visitAliaseeSubExpr(llvm::SmallPtrSetImpl<llvm::GlobalAlias
const*>&, llvm::GlobalAlias const&, llvm::Constant const&)
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:584:5
#2 0xb491df in (anonymous
namespace)::Verifier::visitAliaseeSubExpr(llvm::SmallPtrSetImpl<llvm::GlobalAlias
const*>&, llvm::GlobalAlias const&, llvm::Constant const&)
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:591:7
...
#249 0xb491df in (anonymous
namespace)::Verifier::visitAliaseeSubExpr(llvm::SmallPtrSetImpl<llvm::GlobalAlias
const*>&, llvm::GlobalAlias const&, llvm::Constant const&)
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:591:7
#250 0xb491df in (anonymous
namespace)::Verifier::visitAliaseeSubExpr(llvm::SmallPtrSetImpl<llvm::GlobalAlias
const*>&, llvm::GlobalAlias const&, llvm::Constant const&)
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:591:7
#251 0xb491df in (anonymous
namespace)::Verifier::visitAliaseeSubExpr(llvm::SmallPtrSetImpl<llvm::GlobalAlias
const*>&, llvm::GlobalAlias const&, llvm::Constant const&)
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:591:7
SUMMARY: AddressSanitizer: stack-overflow
/workspace/llvm-dev/llvm/lib/IR/Verifier.cpp:1500 in (anonymous
namespace)::Verifier::VerifyConstantExprBitcastType(llvm::ConstantExpr const*)
==24746==ABORTING</pre>
</div>
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