SIGSEGV with Coroutine::getaddrinfo

[deba12]

Please answer these questions before submitting your issue.

1. What did you do? If possible, provide a simple script for reproducing the error.
   SIGSEGV with Coroutine::getaddrinfo

<?php
declare(strict_types=1);

use Swoole\Coroutine;

Coroutine::set(['hook_flags' => SWOOLE_HOOK_ALL]);

go(static function () {


    $res = Coroutine::getaddrinfo(
        domain: 'swoole-non-existent-domain',
        protocol: 0,
        service: '',
        timeout: 5,
    );

    var_dump($res);
});

2. What did you expect to see?

bool(false)

3. What did you see instead?

$ php cli/dns-bug.php
bool(false)
Segmentation fault

• backtrace from gdb

Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffee7016c0 (LWP 7705)]
[New Thread 0x7fffedf006c0 (LWP 7706)]
[New Thread 0x7fffed6ff6c0 (LWP 7707)]
[New Thread 0x7fffecefe6c0 (LWP 7708)]
[New Thread 0x7fffdffff6c0 (LWP 7709)]
[New Thread 0x7fffdf7fe6c0 (LWP 7710)]
[New Thread 0x7fffdeffd6c0 (LWP 7711)]
[New Thread 0x7fffde7fc6c0 (LWP 7712)]
[New Thread 0x7fffddffb6c0 (LWP 7713)]
[New Thread 0x7fffdd7fa6c0 (LWP 7714)]
[New Thread 0x7fffdcff96c0 (LWP 7715)]
[New Thread 0x7fffbbfff6c0 (LWP 7716)]
[New Thread 0x7fffbb7fe6c0 (LWP 7717)]
[New Thread 0x7fffbaffd6c0 (LWP 7718)]
[New Thread 0x7fffba7fc6c0 (LWP 7719)]
[New Thread 0x7fffb9ffb6c0 (LWP 7720)]
bool(false)

Thread 2 "php" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffee7016c0 (LWP 7705)]
swoole::network::getaddrinfo (req=req@entry=0x7fffee901980) at ./build-8.3/src/network/dns.cc:772
772     ./build-8.3/src/network/dns.cc: No such file or directory.
(gdb) bt full
#0  swoole::network::getaddrinfo (req=req@entry=0x7fffee901980) at ./build-8.3/src/network/dns.cc:772
        result = 0x0
        ptr = 0x0
        hints = {ai_flags = 0, ai_family = 2, ai_socktype = 1, ai_protocol = 0, ai_addrlen = 0, ai_addr = 0x0, ai_canonname = 0x0, ai_next = 0x0}
        ret = -3
        buffer = <optimized out>
        i = <optimized out>
        __PRETTY_FUNCTION__ = "int swoole::network::getaddrinfo(GetaddrinfoRequest*)"
#1  0x00007fffef04e0b5 in swoole::async::handler_getaddrinfo (event=0x555555ef26b0) at ./build-8.3/src/os/base.cc:108
        req = 0x7fffee901980
#2  0x00007fffef04bee5 in operator() (__closure=0x555555bca1b8) at ./build-8.3/src/os/async_thread.cc:251
        event = 0x555555ef26b0
        exit_flag = false
        ext_exitBlock_229 = {_fun = {<No data fields>}, _active = true}
        is_core_worker = true
        this = 0x555555f69ba0
        _send_event = <optimized out>
        is_core_worker = <optimized out>
        this = <optimized out>
        __PRETTY_FUNCTION__ = <optimized out>
        exit_flag = <optimized out>
        ext_exitBlock_229 = <optimized out>
        event = <optimized out>
        ret = <optimized out>
        _sw_error_len = <optimized out>
        lock = <optimized out>
#3  std::__invoke_impl<void, swoole::async::ThreadPool::create_thread(bool)::<lambda()> > (__f=...) at /usr/include/c++/12/bits/invoke.h:61
No locals.
#4  std::__invoke<swoole::async::ThreadPool::create_thread(bool)::<lambda()> > (__fn=...) at /usr/include/c++/12/bits/invoke.h:96
No locals.
#5  std::thread::_Invoker<std::tuple<swoole::async::ThreadPool::create_thread(bool)::<lambda()> > >::_M_invoke<0> (this=0x555555bca1b8) at /usr/include/c++/12/bits/std_thread.h:252
No locals.
#6  std::thread::_Invoker<std::tuple<swoole::async::ThreadPool::create_thread(bool)::<lambda()> > >::operator() (this=0x555555bca1b8) at /usr/include/c++/12/bits/std_thread.h:259
No locals.
#7  std::thread::_State_impl<std::thread::_Invoker<std::tuple<swoole::async::ThreadPool::create_thread(bool)::<lambda()> > > >::_M_run(void) (this=0x555555bca1b0) at /usr/include/c++/12/bits/std_thread.h:210
No locals.
#8  0x00007ffff53b64a3 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#9  0x00007ffff758b144 in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:442
        ret = <optimized out>
        pd = <optimized out>
        out = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737193711296, 2123964537826586669, -696, 0, 140737195808208, 140737185320960, -2123998498760282067, -2123947711764090835}, mask_was_saved = 0}}, priv = {
            pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#10 0x00007ffff760b7dc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
No locals.

4. What version of Swoole are you using (show your php --ri swoole)?

swoole

Swoole => enabled
Author => Swoole Team <[email protected]>
Version => 5.1.4
Built => Sep 21 2024 05:43:29
coroutine => enabled with boost asm context
epoll => enabled
eventfd => enabled
signalfd => enabled
cpu_affinity => enabled
spinlock => enabled
rwlock => enabled
sockets => enabled
openssl => OpenSSL 3.0.14 4 Jun 2024
dtls => enabled
http2 => enabled
json => enabled
curl-native => enabled
pcre => enabled
c-ares => 1.18.1
mutex_timedlock => enabled
pthread_barrier => enabled
futex => enabled
mysqlnd => enabled
async_redis => enabled
coroutine_pgsql => enabled
coroutine_sqlite => enabled

Directive => Local Value => Master Value
swoole.enable_coroutine => On => On
swoole.enable_library => On => On
swoole.enable_fiber_mock => Off => Off
swoole.enable_preemptive_scheduler => Off => Off
swoole.display_errors => On => On
swoole.use_shortname => On => On
swoole.unixsock_buffer_size => 8388608 => 8388608

5. What is your machine environment used (show your uname -a & php -v & gcc -v) ?

Linux e1 5.15.153.1-microsoft-standard-WSL2 #1 SMP Fri Mar 29 23:14:13 UTC 2024 x86_64 GNU/Linux

PHP 8.3.11 (cli) (built: Sep  2 2024 15:06:27) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.3.11, Copyright (c) Zend Technologies
    with Zend OPcache v8.3.11, Copyright (c), by Zend Technologies

Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/12/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 12.2.0-14' --with-bugurl=file:///usr/share/doc/gcc-12/README.Bugs --enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-12 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --enable-cet --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-12-bTRWOB/gcc-12-12.2.0/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-12-bTRWOB/gcc-12-12.2.0/debian/tmp-gcn/usr --enable-offload-defaulted --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.2.0 (Debian 12.2.0-14)

[matyhtf]

无法重现

出现这个问题，一般是主进程已退出了，但是 AIO 线程依然在运行。你提供的代码是否完整，或者是否安装了什么特殊的扩展。

建议使用 valgrind 跟踪内存错误

[deba12]

valgrind.txt

[deba12]

@matyhtf could you please make backport for 5.1.x ?

[matyhtf]

@deba12 This fix will be included in version 5.1.6.