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Program exits with SIGABRT or SIGSEGV when using libnice #1299

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BlueCannonBall opened this issue Nov 28, 2024 · 3 comments · Fixed by #1300
Closed

Program exits with SIGABRT or SIGSEGV when using libnice #1299

BlueCannonBall opened this issue Nov 28, 2024 · 3 comments · Fixed by #1300

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@BlueCannonBall
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If a PeerConnection is created anywhere in the program, the program will die by SIGABRT as soon as it exits. This does not happen when using libjuice. See the example below:

#include "rtc/rtc.hpp"

int main() {
	rtc::InitLogger(rtc::LogLevel::Debug);
	auto pc = std::make_shared<rtc::PeerConnection>();
}

Output:

2024-11-28 15:05:08.392 DEBUG [178677] [rtc::impl::Init::doInit@113] Global initialization
2024-11-28 15:05:08.393 DEBUG [178677] [rtc::impl::Init::doInit@123] Spawning 8 threads
2024-11-28 15:05:08.393 DEBUG [178686] [rtc::impl::PollService::runLoop@164] Poll service started
2024-11-28 15:05:08.401 INFO  [178677] [rtc::impl::PeerConnection::changeIceState@1339] Changed ICE state to closed
2024-11-28 15:05:08.401 INFO  [178677] [rtc::impl::PeerConnection::changeState@1321] Changed state to closed
2024-11-28 15:05:08.401 DEBUG [178678] [rtc::impl::Certificate::Generate@445] Generating certificate (OpenSSL)
2024-11-28 15:05:08.401 WARN  [178678] [rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate@105] Unable to generate ECDSA P-256 key pair
terminate called without an active exception
fish: Job 1, './program' terminated by signal SIGABRT (Abort)
@paullouisageneau
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paullouisageneau commented Nov 29, 2024 •
edited
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The build looks broken, as the earlier warning "Unable to generate ECDSA P-256 key pair" indicates something is very wrong with OpenSSL. You should try running the program in a debugger, but this is probably not related to libdatachannel itself.

@BlueCannonBall
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BlueCannonBall commented Nov 29, 2024 •
edited
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The OpenSSL is from apt on Ubuntu 24.10. When I run it with gdb, it either segfaults or throws SIGABRT.

Backtrace when it segfaults:

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
2024-11-29 15:11:34.201 DEBUG [208028] [rtc::impl::Init::doInit@113] Global initialization
2024-11-29 15:11:34.201 DEBUG [208028] [rtc::impl::Init::doInit@123] Spawning 8 threads
[New Thread 0x7ffff36006c0 (LWP 208035)]
[New Thread 0x7ffff2c006c0 (LWP 208036)]
[New Thread 0x7ffff22006c0 (LWP 208037)]
[New Thread 0x7ffff18006c0 (LWP 208038)]
[New Thread 0x7ffff0e006c0 (LWP 208039)]
[New Thread 0x7ffff04006c0 (LWP 208040)]
[New Thread 0x7fffefa006c0 (LWP 208041)]
[New Thread 0x7fffef0006c0 (LWP 208042)]
[New Thread 0x7fffee6006c0 (LWP 208043)]
2024-11-29 15:11:34.203 DEBUG [208043] [rtc::impl::PollService::runLoop@164] Poll service started
[New Thread 0x7fffedc006c0 (LWP 208044)]
[New Thread 0x7fffed2006c0 (LWP 208045)]
[New Thread 0x7fffe7e006c0 (LWP 208046)]
2024-11-29 15:11:34.213 DEBUG [208035] [rtc::impl::Certificate::Generate@445] Generating certificate (OpenSSL)
2024-11-29 15:11:34.213 INFO  [208028] [rtc::impl::PeerConnection::changeIceState@1339] Changed ICE state to closed
2024-11-29 15:11:34.213 INFO  [208028] [rtc::impl::PeerConnection::changeState@1321] Changed state to closed
terminate called without an active exception

Thread 2 "RTC worker" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff36006c0 (LWP 208035)]
0x00007ffff6b7a13c in OPENSSL_sk_insert () from /lib/x86_64-linux-gnu/libcrypto.so.3
(gdb) bt
#0  0x00007ffff6b7a13c in OPENSSL_sk_insert () at /lib/x86_64-linux-gnu/libcrypto.so.3
#1  0x00007ffff6b3198c in ??? () at /lib/x86_64-linux-gnu/libcrypto.so.3
#2  0x00007ffff69e8b5a in ??? () at /lib/x86_64-linux-gnu/libcrypto.so.3
#3  0x00007ffff6a4236e in ??? () at /lib/x86_64-linux-gnu/libcrypto.so.3
#4  0x00007ffff6a420b4 in ??? () at /lib/x86_64-linux-gnu/libcrypto.so.3
#5  0x00007ffff6a582f7 in ??? () at /lib/x86_64-linux-gnu/libcrypto.so.3
#6  0x00007ffff6a42213 in ??? () at /lib/x86_64-linux-gnu/libcrypto.so.3
#7  0x00007ffff6a42577 in ??? () at /lib/x86_64-linux-gnu/libcrypto.so.3
#8  0x00007ffff69e8ee2 in ??? () at /lib/x86_64-linux-gnu/libcrypto.so.3
#9  0x00007ffff69e9940 in OSSL_ENCODER_do_all_provided () at /lib/x86_64-linux-gnu/libcrypto.so.3
#10 0x00007ffff69ea324 in OSSL_ENCODER_CTX_new_for_pkey () at /lib/x86_64-linux-gnu/libcrypto.so.3
#11 0x00007ffff6bbbbcc in X509_PUBKEY_set () at /lib/x86_64-linux-gnu/libcrypto.so.3
#12 0x00007ffff6bacd0e in X509_set_pubkey () at /lib/x86_64-linux-gnu/libcrypto.so.3
#13 0x00007ffff7bc5ba2 in rtc::impl::Certificate::Generate (type=rtc::CertificateType::Default, commonName="libdatachannel")
    at /home/optimal/Desktop/mm_files/cpp/libdatachannel-test/src/impl/certificate.cpp:513
#14 0x00007ffff7bc6823 in operator() (__closure=0x5555555b0698)
    at /home/optimal/Desktop/mm_files/cpp/libdatachannel-test/src/impl/certificate.cpp:594
#15 0x00007ffff7bc75a1 in std::__invoke_impl<std::shared_ptr<rtc::impl::Certificate>, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&>(std::__invoke_other, struct {...} &) (__f=...) at /usr/include/c++/14/bits/invoke.h:61
#16 0x00007ffff7bc7361 in std::__invoke<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&>(struct {...} &) (__fn=...)
    at /usr/include/c++/14/bits/invoke.h:97
#17 0x00007ffff7bc71bc in std::_Bind<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>()>::__call<std::shared_ptr<rtc::impl::Certificate> >(std::tuple<> &&, std::_Index_tuple<>) (this=0x5555555b0698, __args=...) at /usr/include/c++/14/functional:515
#18 0x00007ffff7bc702d in std::_Bind<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>()>::operator()<>(void) (this=0x5555555b0698)
    at /usr/include/c++/14/functional:600
#19 0x00007ffff7bc6bb0 in operator() (__closure=0x5555555b0698)
    at /home/optimal/Desktop/mm_files/cpp/libdatachannel-test/src/impl/threadpool.hpp:103
#20 0x00007ffff7bc8d16 in std::__invoke_impl<std::shared_ptr<rtc::impl::Certificate>, rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()> >(std::chrono::_V2::steady_clock::time_point, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&&)::<lam--Type <RET> for more, q to quit, c to continue without paging--c
bda()>&>(std::__invoke_other, struct {...} &) (__f=...) at /usr/include/c++/14/bits/invoke.h:61
#21 0x00007ffff7bc8af3 in std::__invoke_r<std::shared_ptr<rtc::impl::Certificate>, rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()> >(std::chrono::_V2::steady_clock::time_point, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&&)::<lambda()>&>(struct {...} &) (__fn=...) at /usr/include/c++/14/bits/invoke.h:116
#22 0x00007ffff7bc87e9 in operator() (__closure=0x7ffff35fd0b8) at /usr/include/c++/14/future:1499
#23 0x00007ffff7bc94dd in std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<std::shared_ptr<rtc::impl::Certificate> >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()> >(std::chrono::_V2::steady_clock::time_point, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&&)::<lambda()>, std::allocator<int>, std::shared_ptr<rtc::impl::Certificate>()>::_M_run()::<lambda()>, std::shared_ptr<rtc::impl::Certificate> >::operator()(void) const (this=0x7ffff35fd0d0) at /usr/include/c++/14/future:1416
#24 0x00007ffff7bc9353 in std::__invoke_impl<std::unique_ptr<std::__future_base::_Result<std::shared_ptr<rtc::impl::Certificate> >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<std::shared_ptr<rtc::impl::Certificate> >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()> >(std::chrono::_V2::steady_clock::time_point, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&&)::<lambda()>, std::allocator<int>, std::shared_ptr<rtc::impl::Certificate>()>::_M_run()::<lambda()>, std::shared_ptr<rtc::impl::Certificate> >&>(std::__invoke_other, std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<std::shared_ptr<rtc::impl::Certificate> >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()> >(std::chrono::_V2::steady_clock::time_point, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&&)::<lambda()>, std::allocator<int>, std::shared_ptr<rtc::impl::Certificate>()>::_M_run()::<lambda()>, std::shared_ptr<rtc::impl::Certificate> > &) (__f=...)
    at /usr/include/c++/14/bits/invoke.h:61
#25 0x00007ffff7bc9035 in std::__invoke_r<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<std::shared_ptr<rtc::impl::Certificate> >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()> >(std::chrono::_V2::steady_clock::time_point, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&&)::<lambda()>, std::allocator<int>, std::shared_ptr<rtc::impl::Certificate>()>::_M_run()::<lambda()>, std::shared_ptr<rtc::impl::Certificate> >&>(std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<std::shared_ptr<rtc::impl::Certificate> >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()> >(std::chrono::_V2::steady_clock::time_point, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&&)::<lambda()>, std::allocator<int>, std::shared_ptr<rtc::impl::Certificate>()>::_M_run()::<lambda()>, std::shared_ptr<rtc::impl::Certificate> > &) (__fn=...) at /usr/include/c++/14/bits/invoke.h:114
#26 0x00007ffff7bc8dbf in std::_Function_handler<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>(), std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<std::shared_ptr<rtc::impl::Certificate> >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()> >(std::chrono::_V2::steady_clock::time_point, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&&)::<lambda()>, std::allocator<int>, std::shared_ptr<rtc::impl::Certificate>()>::_M_run()::<lambda()>, std::shared_ptr<rtc::impl::Certificate> > >::_M_invoke(const std::_Any_data &)
    (__functor=...) at /usr/include/c++/14/bits/std_function.h:291
#27 0x00007ffff7bbee60 in std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>()>::operator() (this=0x7ffff35fd0d0) at /usr/include/c++/14/bits/std_function.h:591
#28 0x00007ffff7bbe4c2 in std::__future_base::_State_baseV2::_M_do_set (this=0x5555555b0670, __f=0x7ffff35fd0d0, __did_set=0x7ffff35fd01f)
    at /usr/include/c++/14/future:596
#29 0x00007ffff7bc028d in std::__invoke_impl<void, void (std::__future_base::_State_baseV2::*)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>()>*, bool*), std::__future_base::_State_baseV2*, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>()>*, bool*>
    (__f=@0x7ffff35fd060: (void (std::__future_base::_State_baseV2::*)(std::__future_base::_State_baseV2 * const, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>()> *, bool *)) 0x7ffff7bbe488 <std::__future_base::_State_baseV2::_M_do_set(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*)>, __t=@0x7ffff35fd030: 0x5555555b0670) at /usr/include/c++/14/bits/invoke.h:74
#30 0x00007ffff7bbf767 in std::__invoke<void (std::__future_base::_State_baseV2::*)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>()>*, bool*), std::__future_base::_State_baseV2*, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>()>*, bool*>
    (__fn=@0x7ffff35fd060: (void (std::__future_base::_State_baseV2::*)(std::__future_base::_State_baseV2 * const, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>()> *, bool *)) 0x7ffff7bbe488 <std::__future_base::_State_baseV2::_M_do_set(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*)>)
    at /usr/include/c++/14/bits/invoke.h:96
#31 0x00007ffff7bbea08 in std::call_once<void (std::__future_base::_State_baseV2::*)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*), std::__future_base::_State_baseV2*, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*>(std::once_flag&, void (std::__future_base::_State_baseV2::*&&)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*), std::__future_base::_State_baseV2*&&, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*&&, bool*&&)::{lambda()#1}::operator()() const (__closure=0x7ffff35fcfa0) at /usr/include/c++/14/mutex:909
#32 0x00007ffff7bbf79f in std::once_flag::_Prepare_execution::_Prepare_execution<std::call_once<void (std::__future_base::_State_baseV2::*)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*), std::__future_base::_State_baseV2*, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*>(std::once_flag&, void (std::__future_base::_State_baseV2::*&&)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*), std::__future_base::_State_baseV2*&&, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*&&, bool*&&)::{lambda()#1}>(void (std::__future_base::_State_baseV2::*&)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*))::{lambda()#1}::operator()() const (__closure=0x0) at /usr/include/c++/14/mutex:845
#33 0x00007ffff7bbf7b4 in std::once_flag::_Prepare_execution::_Prepare_execution<std::call_once<void (std::__future_base::_State_baseV2::*)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*), std::__future_base::_State_baseV2*, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*>(std::once_flag&, void (std::__future_base::_State_baseV2::*&&)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*), std::__future_base::_State_baseV2*&&, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*&&, bool*&&)::{lambda()#1}>(void (std::__future_base::_State_baseV2::*&)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*))::{lambda()#1}::_FUN() () at /usr/include/c++/14/mutex:845
#34 0x00007ffff6ea73cb in __pthread_once_slow (once_control=0x5555555b0688, init_routine=0x7ffff72eb420 <__once_proxy>)
    at ./nptl/pthread_once.c:116
#35 0x00007ffff6ea7439 in ___pthread_once (once_control=<optimized out>, init_routine=<optimized out>) at ./nptl/pthread_once.c:143
#36 0x00007ffff7bbd908 in __gthread_once (__once=0x5555555b0688, __func=0x7ffff72eb420 <__once_proxy>)
    at /usr/include/x86_64-linux-gnu/c++/14/bits/gthr-default.h:713
#37 0x00007ffff7bbea8d in std::call_once<void (std::__future_base::_State_baseV2::*)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>()>*, bool*), std::__future_base::_State_baseV2*, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>()>*, bool*>
    (__once=..., __f=@0x7ffff35fd060: (void (std::__future_base::_State_baseV2::*)(std::__future_base::_State_baseV2 * const, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>()> *, bool *)) 0x7ffff7bbe488 <std::__future_base::_State_baseV2::_M_do_set(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*)>)
    at /usr/include/c++/14/mutex:916
#38 0x00007ffff7bbe03a in std::__future_base::_State_baseV2::_M_set_result (this=0x5555555b0670, __res=..., __ignore_failure=false)
    at /usr/include/c++/14/future:435
#39 0x00007ffff7bc8876 in std::__future_base::_Task_state<rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()> >(std::chrono::_V2::steady_clock::time_point, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&&)::<lambda()>, std::allocator<int>, std::shared_ptr<rtc::impl::Certificate>()>::_M_run(void) (this=0x5555555b0670) at /usr/include/c++/14/future:1501
#40 0x00007ffff7bcbc35 in std::packaged_task<std::shared_ptr<rtc::impl::Certificate>()>::operator() (this=0x5555555e8e00)
    at /usr/include/c++/14/future:1635
#41 0x00007ffff7bc6ddc in operator() (__closure=0x7fffd8000b70)
    at /home/optimal/Desktop/mm_files/cpp/libdatachannel-test/src/impl/threadpool.hpp:111
#42 0x00007ffff7bc7770 in std::__invoke_impl<void, rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()> >(std::chrono::_V2::steady_clock::time_point, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&&)::<lambda()>&>(std::__invoke_other, struct {...} &) (__f=...) at /usr/include/c++/14/bits/invoke.h:61
#43 0x00007ffff7bc7492 in std::__invoke_r<void, rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()> >(std::chrono::_V2::steady_clock::time_point, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&&)::<lambda()>&>(struct {...} &) (__fn=...)
    at /usr/include/c++/14/bits/invoke.h:111
#44 0x00007ffff7bc7294 in std::_Function_handler<void(), rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate(rtc::CertificateType)::<lambda()> >(std::chrono::_V2::steady_clock::time_point, rtc::impl::make_certificate(rtc::CertificateType)::<lambda()>&&)::<lambda()> >::_M_invoke(const std::_Any_data &) (__functor=...) at /usr/include/c++/14/bits/std_function.h:290
#45 0x00007ffff7ad1aee in std::function<void()>::operator() (this=0x7ffff35fd1f0) at /usr/include/c++/14/bits/std_function.h:591
#46 0x00007ffff7c6659f in rtc::impl::ThreadPool::runOne (this=0x55555559a8b0)
    at /home/optimal/Desktop/mm_files/cpp/libdatachannel-test/src/impl/threadpool.cpp:67
#47 0x00007ffff7c664a4 in rtc::impl::ThreadPool::run (this=0x55555559a8b0)
    at /home/optimal/Desktop/mm_files/cpp/libdatachannel-test/src/impl/threadpool.cpp:61
#48 0x00007ffff7c69c73 in std::__invoke_impl<void, void (rtc::impl::ThreadPool::*&)(), rtc::impl::ThreadPool*&>
    (__f=@0x55555559a818: (void (rtc::impl::ThreadPool::*)(rtc::impl::ThreadPool * const)) 0x7ffff7c663e4 <rtc::impl::ThreadPool::run()>, __t=@0x55555559a828: 0x55555559a8b0) at /usr/include/c++/14/bits/invoke.h:74
#49 0x00007ffff7c69bef in std::__invoke<void (rtc::impl::ThreadPool::*&)(), rtc::impl::ThreadPool*&>
    (__fn=@0x55555559a818: (void (rtc::impl::ThreadPool::*)(rtc::impl::ThreadPool * const)) 0x7ffff7c663e4 <rtc::impl::ThreadPool::run()>)
    at /usr/include/c++/14/bits/invoke.h:96
#50 0x00007ffff7c69b59 in std::_Bind<void (rtc::impl::ThreadPool::*(rtc::impl::ThreadPool*))()>::__call<void, , 0ul>(std::tuple<>&&, std::_Index_tuple<0ul>) (this=0x55555559a818, __args=...) at /usr/include/c++/14/functional:513
#51 0x00007ffff7c69ad5 in std::_Bind<void (rtc::impl::ThreadPool::*(rtc::impl::ThreadPool*))()>::operator()<, void>() (this=0x55555559a818)
    at /usr/include/c++/14/functional:598
#52 0x00007ffff7c69a7c in std::__invoke_impl<void, std::_Bind<void (rtc::impl::ThreadPool::*(rtc::impl::ThreadPool*))()>>(std::__invoke_other, std::_Bind<void (rtc::impl::ThreadPool::*(rtc::impl::ThreadPool*))()>&&) (__f=...) at /usr/include/c++/14/bits/invoke.h:61
#53 0x00007ffff7c69a37 in std::__invoke<std::_Bind<void (rtc::impl::ThreadPool::*(rtc::impl::ThreadPool*))()>>(std::_Bind<void (rtc::impl::ThreadPool::*(rtc::impl::ThreadPool*))()>&&) (__fn=...) at /usr/include/c++/14/bits/invoke.h:96
#54 0x00007ffff7c699d8 in std::thread::_Invoker<std::tuple<std::_Bind<void (rtc::impl::ThreadPool::*(rtc::impl::ThreadPool*))()> > >::_M_invoke<0ul>(std::_Index_tuple<0ul>) (this=0x55555559a818) at /usr/include/c++/14/bits/std_thread.h:301
#55 0x00007ffff7c699a8 in std::thread::_Invoker<std::tuple<std::_Bind<void (rtc::impl::ThreadPool::*(rtc::impl::ThreadPool*))()> > >::operator()()
    (this=0x55555559a818) at /usr/include/c++/14/bits/std_thread.h:308
#56 0x00007ffff7c69988 in std::thread::_State_impl<std::thread::_Invoker<std::tuple<std::_Bind<void (rtc::impl::ThreadPool::*(rtc::impl::ThreadPool*))()> > > >::_M_run() (this=0x55555559a810) at /usr/include/c++/14/bits/std_thread.h:253
#57 0x00007ffff72ecdb4 in ??? () at /lib/x86_64-linux-gnu/libstdc++.so.6
#58 0x00007ffff6ea1e2e in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:447
#59 0x00007ffff6f33a4c in __GI___clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Backtrace when it throws SIGABRT:

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
2024-11-29 15:14:48.320 DEBUG [208457] [rtc::impl::Init::doInit@113] Global initialization
2024-11-29 15:14:48.320 DEBUG [208457] [rtc::impl::Init::doInit@123] Spawning 8 threads
[New Thread 0x7ffff36006c0 (LWP 208462)]
[New Thread 0x7ffff2c006c0 (LWP 208463)]
[New Thread 0x7ffff22006c0 (LWP 208464)]
[New Thread 0x7ffff18006c0 (LWP 208465)]
[New Thread 0x7ffff0e006c0 (LWP 208466)]
[New Thread 0x7ffff04006c0 (LWP 208467)]
[New Thread 0x7fffefa006c0 (LWP 208468)]
[New Thread 0x7fffef0006c0 (LWP 208469)]
[New Thread 0x7fffee6006c0 (LWP 208470)]
2024-11-29 15:14:48.323 DEBUG [208470] [rtc::impl::PollService::runLoop@164] Poll service started
[New Thread 0x7fffedc006c0 (LWP 208471)]
[New Thread 0x7fffed2006c0 (LWP 208472)]
[New Thread 0x7fffe7e006c0 (LWP 208473)]
2024-11-29 15:14:48.329 DEBUG [208462] [rtc::impl::Certificate::Generate@445] Generating certificate (OpenSSL)
2024-11-29 15:14:48.330 INFO  [208457] [rtc::impl::PeerConnection::changeIceState@1339] Changed ICE state to closed
2024-11-29 15:14:48.330 INFO  [208457] [rtc::impl::PeerConnection::changeState@1321] Changed state to closed
2024-11-29 15:14:48.330 WARN  [208462] [rtc::impl::ThreadPool::schedule<rtc::impl::make_certificate@105] Unable to generate ECDSA P-256 key pair
terminate called without an active exception

Thread 1 "media-sender" received signal SIGABRT, Aborted.
__pthread_kill_implementation (threadid=<optimized out>, signo=6, no_tid=0) at ./nptl/pthread_kill.c:44
warning: 44     ./nptl/pthread_kill.c: No such file or directory
(gdb) bt
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=6, no_tid=0) at ./nptl/pthread_kill.c:44
#1  __pthread_kill_internal (threadid=<optimized out>, signo=6) at ./nptl/pthread_kill.c:78
#2  __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ./nptl/pthread_kill.c:89
#3  0x00007ffff6e4519e in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#4  0x00007ffff6e28902 in __GI_abort () at ./stdlib/abort.c:79
#5  0x00007ffff72a5ff5 in ??? () at /lib/x86_64-linux-gnu/libstdc++.so.6
#6  0x00007ffff72bb0da in ??? () at /lib/x86_64-linux-gnu/libstdc++.so.6
#7  0x00007ffff72a5a55 in std::terminate() () at /lib/x86_64-linux-gnu/libstdc++.so.6
#8  0x00007ffff7bed16d in std::__terminate () at /usr/include/x86_64-linux-gnu/c++/14/bits/c++config.h:324
#9  std::thread::~thread (this=0x7ffff7eaabf0 <rtc::impl::IceTransport::MainLoopThread>, __in_chrg=<optimized out>)
    at /usr/include/c++/14/bits/std_thread.h:182
#10 0x00007ffff6e47482 in __cxa_finalize (d=0x7ffff7ea8ee0) at ./stdlib/cxa_finalize.c:97
#11 0x00007ffff7ac5d17 in __do_global_dtors_aux () at /home/optimal/Desktop/mm_files/cpp/libdatachannel-test/build/libdatachannel.so.0.22
#12 0x00007fffffffdd70 in ??? ()
#13 0x00007ffff7fc40f2 in _dl_call_fini (closure_map=0x7ffff7fbb2b0) at ./elf/dl-call_fini.c:43

EDIT: It also segfaults sometimes when I run it without gdb.

@BlueCannonBall BlueCannonBall changed the title Program exits with SIGABRT when using libnice Program exits with SIGABRT or SIGSEGV when using libnice Nov 29, 2024
@paullouisageneau paullouisageneau mentioned this issue Dec 2, 2024
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@paullouisageneau
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OK, this is unrelated to libnice and actually a problem with OpenSSL. The issue is that your test program creates a peer connection then immediately exits. It appears OpenSSL registers an atexit handler to cleanup everything as soon as the main thread exits. In this case, the certificate is created in a background thread during cleanup so it leads to a race condition in OpenSSL.

The issue will disappear if the program does not exit immediately, however it could happen in other scenarios at exit so I pushed a fix in #1300.

@paullouisageneau paullouisageneau linked a pull request Dec 4, 2024 that will close this issue
Fix possible race condition at exit with OpenSSL #1300
Merged
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Fix possible race condition at exit with OpenSSL paullouisageneau/libdatachannel
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@paullouisageneau @BlueCannonBall