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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Crash in __sanitizer::DTLS_on_tls_get_addr if alternate stack is regsitered"
href="https://bugs.llvm.org/show_bug.cgi?id=50225">50225</a>
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</tr>
<tr>
<th>Summary</th>
<td>Crash in __sanitizer::DTLS_on_tls_get_addr if alternate stack is regsitered
</td>
</tr>
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<th>Product</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Version</th>
<td>12.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<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>asan
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dominik.strasser@onespin.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=24827" name="attach_24827" title="Test source">attachment 24827</a> <a href="attachment.cgi?id=24827&action=edit" title="Test source">[details]</a></span>
Test source
Please see the attached C++ program which should run on any Linux system.
In this program, the signal stack is set to an mmaped region.
This makes ASAN crashlike this:
#0 0x4e5f85 in __sanitizer::DTLS_on_tls_get_addr(void*, void*, unsigned
long, unsigned long)
/local/software/llvm-12.0.0.src/projects/compiler-rt/lib/sanitizer_common/sanitizer_tls_get_addr.cpp:116:20
#1 0x43e60d in __interceptor___tls_get_addr
/local/software/llvm-12.0.0.src/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:5302:40
#2 0x43e60d in __tls_get_addr
/local/software/llvm-12.0.0.src/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:5296:1
#3 0x7f4b574a3d0f in __cxa_get_globals
/local/software/gcc-10.3.obj/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/../../../../gcc-10.3.0/libstdc++-v3/libsupc++/eh_globals.cc:62:21
#4 0x7f4b574a3bd8 in std::uncaught_exception()
/local/software/gcc-10.3.obj/x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/../../../../gcc-10.3.0/libstdc++-v3/libsupc++/eh_catch.cc:140:49
#5 0x50ba34 in
std::_V2::condition_variable_any::_Unlock<std::unique_lock<std::mutex>
<span class="quote">>::~_Unlock()</span >
/sw/local64/gcc-10.3/lib/gcc/x86_64-pc-linux-gnu/10.3.0/../../../../include/c++/10.3.0/condition_variable:273:8
#6 0x50b295 in std::cv_status
std::_V2::condition_variable_any::wait_until<std::unique_lock<std::mutex>,
std::chrono::_V2::system_clock, std::chrono::duration<long, std::ratio<1l,
1000000000l> > >(std::unique_lock<std::mutex>&,
std::chrono::time_point<std::chrono::_V2::system_clock,
std::chrono::duration<long, std::ratio<1l, 1000000000l> > > const&)
/sw/local64/gcc-10.3/lib/gcc/x86_64-pc-linux-gnu/10.3.0/../../../../include/c++/10.3.0/condition_variable:348:7
#7 0x505011 in bool
std::_V2::condition_variable_any::wait_until<std::unique_lock<std::mutex>,
std::chrono::_V2::system_clock, std::chrono::duration<long, std::ratio<1l,
1000000000l> >, main::$_2>(std::unique_lock<std::mutex>&,
std::chrono::time_point<std::chrono::_V2::system_clock,
std::chrono::duration<long, std::ratio<1l, 1000000000l> > > const&, main::$_2)
/sw/local64/gcc-10.3/lib/gcc/x86_64-pc-linux-gnu/10.3.0/../../../../include/c++/10.3.0/condition_variable:358:8
#8 0x502fa3 in bool
std::_V2::condition_variable_any::wait_for<std::unique_lock<std::mutex>, long,
std::ratio<1l, 1l>, main::$_2>(std::unique_lock<std::mutex>&,
std::chrono::duration<long, std::ratio<1l, 1l> > const&, main::$_2)
/sw/local64/gcc-10.3/lib/gcc/x86_64-pc-linux-gnu/10.3.0/../../../../include/c++/10.3.0/condition_variable:373:16
#9 0x50249e in main
/local/strasser/cve/src/libraries/systemlib/unittest/ConditionVariableTest.cpp:40:14
If the threads are not joined at the end of main(), a similar crash occurs is
std::thread::join called from the destructor.
The crash is not 100% reproducable, but ~50%.
Compiler call:
clang++ -fsanitize=address ConditionVariableTest.cpp -lpthread
This is a dupe to Bugzilla#45456, but this time with a test case.</pre>
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