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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Asan heap-use-after-free broken since svn r177634"
href="http://llvm.org/bugs/show_bug.cgi?id=16003">16003</a>
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<th>Summary</th>
<td>Asan heap-use-after-free broken since svn r177634
</td>
</tr>
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<th>Product</th>
<td>compiler-rt
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>awg@embtoolkit.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
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<pre>git bisect result says that asan heap-use-after-free is broken since (svn
r177634)
def1be9b7ef4091ce465c0fbfb26cdb52128ade8 is the first bad commit
commit def1be9b7ef4091ce465c0fbfb26cdb52128ade8
Author: Alexey Samsonov <<a href="mailto:samsonov@google.com">samsonov@google.com</a>>
Date: Thu Mar 21 11:23:41 2013 +0000
[ASan] Switch ASan to generic ThreadRegistry from sanitizer_common. Delete
ASan-specific AsanThreadRegistry.
git-svn-id: <a href="https://llvm.org/svn/llvm-project/compiler-rt/trunk@177634">https://llvm.org/svn/llvm-project/compiler-rt/trunk@177634</a>
91177308-0d34-0410-b5e6-96231b3b80d8
For the following test code (on ARM linux), leads to ASAN:SIGSEGV and never
returns
#include <stdlib.h>
int main()
{
char *x = malloc(10 * sizeof(char*));
free(x);
return x[5];
}
here is the gdb backtrace:
#0 0x010001e0 in ?? ()
#1 0x00024d2c in __sanitizer::ThreadRegistry::CreateThread (
this=0x60931 <__asan::thread_registry_placeholder>, user_id=0,
detached=<optimized out>, parent_tid=0, arg=0xbeaafd50)
at
/home/walsimou/projects/llvm/compiler-rt.git/lib/sanitizer_common/sanitizer_thread_registry.cc:130
#2 0x0001d7b0 in __asan_init_v3 ()
at /home/walsimou/projects/llvm/compiler-rt.git/lib/asan/asan_rtl.cc:524
#3 0xb6f0fcd4 in _dl_init (main_map=0xb6f25958, argc=1, argv=0xbeaafda4,
env=0xbeaafdac) at dl-init.c:119
#4 0xb6f02b04 in _dl_start_user () from /lib/ld-linux.so.3
#5 0xb6f02b04 in _dl_start_user () from /lib/ld-linux.so.3
Backtrace stopped: previous frame identical to this frame (corrupt stack?)</pre>
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