[Boost-bugs] [Boost C++ Libraries] #11945: Segmentation fault on using boost syslog and cpp-netlib

Subject: [Boost-bugs] [Boost C++ Libraries] #11945: Segmentation fault on using boost syslog and cpp-netlib
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-01-28 09:57:04

#11945: Segmentation fault on using boost syslog and cpp-netlib
----------------------------------+---------------------
 Reporter:  c.dovgal@…            |      Owner:  andysem
     Type:  Bugs                  |     Status:  new
Milestone:  To Be Determined      |  Component:  log
  Version:  Boost Release Branch  |   Severity:  Problem
 Keywords:                        |
----------------------------------+---------------------
 After adding boost syslog into source code, segmentation fault appears
 inside cpp-netlib library. I was able to prepare minimum working code
 snippet to reproduce the problem.

 {{{
 #!c++
 #include <boost/network/protocol/http/client.hpp>
 #include <boost/log/utility/setup/file.hpp>
 #include <boost/log/sinks/syslog_backend.hpp>

 #include <iostream>

 using namespace boost::network;
 using namespace boost::network::http;

 namespace sinks = boost::log::sinks;

 int main()
 {
     client::request request_("http://www.boost.org/");
     client client_;
     client::response response_ = client_.get(request_);
     std::string body_ = body(response_);
     std::cout << "body: " << body_;
     using syslog_sinkT = sinks::synchronous_sink <sinks::syslog_backend>;
     boost::shared_ptr <sinks::syslog_backend> backend = boost::make_shared
 <sinks::syslog_backend> ();
     boost::shared_ptr<syslog_sinkT> sink = boost::make_shared
 <syslog_sinkT> (backend);
 }
 }}}

 When last 2 lines are commented, segmentation fault disappears and
 everything works fine.

 gdb stack trace (approximately, may vary):

 {{{
 Program received signal SIGSEGV, Segmentation fault.
 [Switching to Thread 0xf7c29b40 (LWP 19874)]
 0x00000000 in ?? ()
 (gdb) where
 #0  0x00000000 in ?? ()
 #1  0x083c376c in boost::asio::detail::task_io_service_operation::complete
 (bytes_transferred=260, ec=..., owner=...,
     this=0xf6900710)
     at /home/kostidov/prj/third_party-
 master/boost/boost_1_60_0/__public__/v0/Linux-
 libc6/include/boost/asio/detail/task_io_service_o$
 eration.hpp:38
 #2  boost::asio::detail::task_io_service::do_run_one (ec=...,
 this_thread=..., lock=..., this=<optimized out>)
     at /home/kostidov/prj/third_party-
 master/boost/boost_1_60_0/__public__/v0/Linux-
 libc6/include/boost/asio/detail/impl/task_io_serv$
 ce.ipp:372
 #3  boost::asio::detail::task_io_service::run (ec=..., this=0x84ea280)
     at /home/kostidov/prj/third_party-
 master/boost/boost_1_60_0/__public__/v0/Linux-
 libc6/include/boost/asio/detail/impl/task_io_serv$
 ce.ipp:149
 #4  boost::asio::io_service::run (this=0x84e9a94)
     at /home/kostidov/prj/third_party-
 master/boost/boost_1_60_0/__public__/v0/Linux-
 libc6/include/boost/asio/impl/io_service.ipp:59
 #5  0x083b5766 in boost::_mfi::mf0<unsigned int,
 boost::asio::io_service>::operator() (p=<optimized out>, this=<optimized
 out>)
     at /home/kostidov/prj/third_party-
 master/boost/boost_1_60_0/__public__/v0/Linux-
 libc6/include/boost/bind/mem_fn_template.hpp:49
 #6  boost::_bi::list1<boost::_bi::value<boost::asio::io_service*>
 >::operator()<unsigned int, boost::_mfi::mf0<unsigned int, boost::a$
 io::io_service>, boost::_bi::list0> (a=<synthetic pointer>, f=...,
 this=0x84ea94c)
     at /home/kostidov/prj/third_party-
 master/boost/boost_1_60_0/__public__/v0/Linux-
 libc6/include/boost/bind/bind.hpp:249
 #7  boost::_bi::bind_t<unsigned int, boost::_mfi::mf0<unsigned int,
 boost::asio::io_service>, boost::_bi::list1<boost::_bi::value<boo$
 t::asio::io_service*> > >::operator() (this=0x84ea944)
     at /home/kostidov/prj/third_party-
 master/boost/boost_1_60_0/__public__/v0/Linux-
 libc6/include/boost/bind/bind.hpp:1222
 #8  boost::detail::thread_data<boost::_bi::bind_t<unsigned int,
 boost::_mfi::mf0<unsigned int, boost::asio::io_service>, boost::_bi::$
 ist1<boost::_bi::value<boost::asio::io_service*> > > >::run
 (this=0x84ea828)
     at /home/kostidov/prj/third_party-
 master/boost/boost_1_60_0/__public__/v0/Linux-
 libc6/include/boost/thread/detail/thread.hpp:116
 #9  0x0840a4f8 in boost::(anonymous namespace)::thread_proxy
 (param=0x84ea828) at libs/thread/src/pthread/thread.cpp:167
 #10 0xf7de1f70 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
 #11 0xf7d18bee in clone () from /lib/i386-linux-gnu/libc.so.6
 }}}

 Problem exists on Ubuntu 14.04 with cpp-netlib 0.11.2 and both boost
 versions 1_58_0 and 1_60_0. Boost, cpp-netlib and my application are
 compiled with -std=c++11. GCC versions which were used: 4.8.4, 5.2.0.

 Note 1. Segmentation fault appears inside cpp-netlib before reaching
 syslog_backend creation. Only presence of last 2 lines guarantees SIGSEGV
 reproduction.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11945>
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