<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Stack-overflow in demangler (1)"
href="https://bugs.llvm.org/show_bug.cgi?id=32878">32878</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Stack-overflow in demangler (1)
</td>
</tr>
<tr>
<th>Product</th>
<td>libc++abi
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</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>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dungnguy@comp.nus.edu.sg
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>Dear All,
This bug was found with AFLGo, a directed version of AFL/AFLFast. Thanks also
to Marcel Böhme and Van-Thuan Pham.
First, you need to build the project
(<a href="https://github.com/llvm-mirror/libcxxabi/blob/master/fuzz/cxa_demangle_fuzzer.cpp">https://github.com/llvm-mirror/libcxxabi/blob/master/fuzz/cxa_demangle_fuzzer.cpp</a>)
to obtain the binary file.
To reproduce:
$ for C in $(seq 1 15000); do printf "C"; done > test; echo "" >> test; cat
test | ./cxa_demangle_fuzzer
ASAN says:
==27409==ERROR: AddressSanitizer: stack-overflow on address 0x7ffdf06a8b80 (pc
0x00000084f33b bp 0x7ffdf06a9550 sp 0x7ffdf06a8b80 T0)
#0 0x84f33a in char const* __cxxabiv1::(anonymous
namespace)::parse_builtin_type<__cxxabiv1::(anonymous namespace)::Db>(char
const*, char const*, __cxxabiv1::(anonymous namespace)::Db&)
/src/llvm_libcxxabi/src/cxa_demangle.cpp:379
#1 0x5328ee in char const* __cxxabiv1::(anonymous
namespace)::parse_type<__cxxabiv1::(anonymous namespace)::Db>(char const*, char
const*, __cxxabiv1::(anonymous namespace)::Db&)
/src/llvm_libcxxabi/src/cxa_demangle.cpp:1967:33
#2 0x53393a in char const* __cxxabiv1::(anonymous
namespace)::parse_type<__cxxabiv1::(anonymous namespace)::Db>(char const*, char
const*, __cxxabiv1::(anonymous namespace)::Db&)
/src/llvm_libcxxabi/src/cxa_demangle.cpp:1987:29
#3 0x53393a in char const* __cxxabiv1::(anonymous
namespace)::parse_type<__cxxabiv1::(anonymous namespace)::Db>(char const*, char
const*, __cxxabiv1::(anonymous namespace)::Db&)
/src/llvm_libcxxabi/src/cxa_demangle.cpp:1987:29
...
Cheers,
Manh-Dung Nguyen</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>