double free or corruption

[513198868]

double free or corruption (out)

Thread 3 "agent_server" received signal SIGABRT, Aborted.
[Switching to Thread 0x7ff734e1c0 (LWP 2797432)]
0x0000007ff7b83eac in raise () from /lib/aarch64-linux-gnu/libc.so.6
(gdb) bt
#0 0x0000007ff7b83eac in raise () from /lib/aarch64-linux-gnu/libc.so.6
#1 0x0000007ff7b70aa0 in abort () from /lib/aarch64-linux-gnu/libc.so.6
#2 0x0000007ff7bbde80 in ?? () from /lib/aarch64-linux-gnu/libc.so.6
#3 0x0000007ff7bc53dc in ?? () from /lib/aarch64-linux-gnu/libc.so.6
#4 0x0000007ff7bc6820 in ?? () from /lib/aarch64-linux-gnu/libc.so.6
#5 0x000000000040dd28 in std::default_deletehttplib::Response::operator() (this=, __ptr=0x7fec001bb0) at /root/gccLib/aarch64-linux-gnu/include/c++/7.5.0/bits/unique_ptr.h:78
#6 std::unique_ptr<httplib::Response, std::default_deletehttplib::Response >::~unique_ptr (this=0x7ff734c5c0, __in_chrg=) at /root/gccLib/aarch64-linux-gnu/include/c++/7.5.0/bits/unique_ptr.h:263
#7 httplib::Result::~Result (this=0x7ff734c5c0, in_chrg=) at httplib.h:795
#8 VirtualMeal::registerHostMachine (hostMachineInfo=...,
ip="\200\000\000\264\363\v@\371\375{¨\300\003\326\001\337\377\227`\000\000\264\000\000?\326\367\377\377\027\000\001\200?\341\377\227\203\t\000?\t\000Ё\t\000\260c<B\371B\364F\371c@\000\221!TG\371\003\000\000\371\343\377\227\037 \003\325\037 \003\325\375{\277\251\375\003\000\221j\335\377\227", port=port@entry=58110) at VirtualMeal.cpp:1256
#9 0x000000000041224c in VirtualMeal::<lambda(const httplib::Request&, httplib::Response&, const httplib::ContentReader&)>::operator()(httplib::Response &, const httplib::ContentReader &, const httplib::Request &) (res=...,
content_reader=..., req=..., __closure=) at VirtualMeal.cpp:195
#10 0x000000000043b624 in std::function<void (httplib::Request const&, httplib::Response&, httplib::ContentReader const&)>::operator()(httplib::Request const&, httplib::Response&, httplib::ContentReader const&) const (__args#2=...,
__args#1=..., __args#0=..., this=0x496300) at /root/gccLib/aarch64-linux-gnu/include/c++/7.5.0/bits/std_function.h:706
#11 httplib::Server::dispatch_request_for_content_reader(httplib::Request&, httplib::Response&, httplib::ContentReader, std::vector<std::pair<std::__cxx11::basic_regex<char, std::__cxx11::regex_traits >, std::function<void (httplib::Request const&, httplib::Response&, httplib::ContentReader const&)> >, std::allocator<std::pair<std::__cxx11::basic_regex<char, std::__cxx11::regex_traits >, std::function<void (httplib::Request const&, httplib::Response&, httplib::ContentReader const&)> > > > const&) (req=..., res=..., content_reader=..., handlers=std::vector of length 11, capacity 16 = {...}, this=0x7ffffff2f0) at httplib.h:5006
#12 0x000000000044a330 in httplib::Server::routing (this=this@entry=0x7ffffff2f0, req=..., res=..., strm=...) at httplib.h:4825
#13 0x000000000044c328 in httplib::Server::process_request(httplib::Stream&, bool, bool&, std::function<void (httplib::Request&)> const&) (this=0x7ffffff2f0, this@entry=0x0, strm=..., close_connection=close_connection@entry=false,
connection_closed=connection_closed@entry=@0x7ff734d8df: false, setup_request=...) at httplib.h:5099
#14 0x000000000044c7b4 in httplib::Server::process_and_close_socket(int)::{lambda(httplib::Stream&, bool, bool&)#1}::operator()(httplib::Stream&, bool, bool&) const (connection_closed=@0x7ff734d8df: false, close_connection=false,
strm=..., __closure=) at httplib.h:5131
#15 httplib::detail::process_server_socket<httplib::Server::process_and_close_socket(int)::{lambda(httplib::Stream&, bool, bool&)#1}>(int, unsigned long, long, long, long, long, long, httplib::Server::process_and_close_socket(int)::{lambda(httplib::Stream&, bool, bool&)#1})::{lambda(bool, bool&)#1}::operator()(bool, bool&) const (connection_closed=@0x7ff734d8df: false, close_connection=false, __closure=) at httplib.h:2012
#16 httplib::detail::process_server_socket_core<httplib::detail::process_server_socket<httplib::Server::process_and_close_socket(int)::{lambda(httplib::Stream&, bool, bool&)#1}>(int, unsigned long, long, long, long, long, long, httplib::Server::process_and_close_socket(int)::{lambda(httplib::Stream&, bool, bool&)#1})::{lambda(bool, bool&)#1}>(int, unsigned long, long, httplib::detail::process_server_socket<httplib::Server::process_and_close_socket(int)::{lambda(httplib::Stream&, bool, bool&)#1}>(int, unsigned long, long, long, long, long, long, httplib::Server::process_and_close_socket(int)::{lambda(httplib::Stream&, bool, bool&)#1})::{lambda(bool, bool&)#1}) (callback=...,
keep_alive_timeout_sec=, keep_alive_max_count=, sock=) at httplib.h:1994
#17 httplib::detail::process_server_socket<httplib::Server::process_and_close_socket(int)::{lambda(httplib::Stream&, bool, bool&)#1}>(int, unsigned long, long, long, long, long, long, httplib::Server::process_and_close_socket(int)::{lambda(httplib::Stream&, bool, bool&)#1}) (callback=..., write_timeout_usec=, write_timeout_sec=, read_timeout_usec=, read_timeout_sec=, keep_alive_timeout_sec=,
keep_alive_max_count=, sock=) at httplib.h:2013
#18 httplib::Server::process_and_close_socket (this=0x0, sock=0) at httplib.h:5131
#19 0x0000000000428518 in std::function<void ()>::operator()() const (this=0x7ff734d970) at /root/gccLib/aarch64-linux-gnu/include/c++/7.5.0/bits/std_function.h:706
#20 httplib::ThreadPool::worker::operator() (this=0x497818) at httplib.h:558
#21 std::__invoke_impl<void, httplib::ThreadPool::worker> (__f=...) at /root/gccLib/aarch64-linux-gnu/include/c++/7.5.0/bits/invoke.h:60
#22 std::__invokehttplib::ThreadPool::worker (__fn=...) at /root/gccLib/aarch64-linux-gnu/include/c++/7.5.0/bits/invoke.h:95
#23 std::thread::_Invoker<std::tuplehttplib::ThreadPool::worker >::_M_invoke<0ul> (this=0x497818) at /root/gccLib/aarch64-linux-gnu/include/c++/7.5.0/thread:234
#24 std::thread::_Invoker<std::tuplehttplib::ThreadPool::worker >::operator() (this=0x497818) at /root/gccLib/aarch64-linux-gnu/include/c++/7.5.0/thread:243
#25 std::thread::_State_impl<std::thread::_Invoker<std::tuplehttplib::ThreadPool::worker > >::_M_run (this=0x497810) at /root/gccLib/aarch64-linux-gnu/include/c++/7.5.0/thread:186
#26 0x0000007ff7e5dcac in ?? () from /lib/aarch64-linux-gnu/libstdc++.so.6
#27 0x0000007ff7f73648 in start_thread () from /lib/aarch64-linux-gnu/libpthread.so.0
#28 0x0000007ff7c22c1c in ?? () from /lib/aarch64-linux-gnu/libc.so.6
(gdb) quit
A debugging session is active.

[yhirose]

@513198868 thanks for the report, but it's too little information for me to take a look at. Could you provide the smallest possible code which reproduce the problem? Otherwise, I am not able to confirm if it's a bug in cpp-httplib or not. Thanks!

[513198868]

server.Post("/set", [&](const httplib::Request &req, httplib::Response &res, const httplib::ContentReader &content_reader)
{
std::string body;
content_reader([&](const char *data, size_t data_length)
{
body.append(data, data_length);
return true;
});
cJSON *root = cJSON_Parse(body.c_str());
if (root)
{
string ip = cJSON_GetObjectItem(root, "ip")->valuestring;
int port = cJSON_GetObjectItem(root, "port")->valueint;
if (port == 0)
{
port = atoi(cJSON_GetObjectItem(root, "port")->valuestring);
}
cJSON_Delete(root);
if (!ip.empty() && port != 0)
{
HostMachineInfo hostMachineInfo;
getHostMachineInfo(hostMachineInfo);
registerHostMachine(hostMachineInfo, ip, port);
}
writeHostConfig(ip, port);
res.set_content("{"status":"0","data":"","msg":"success"}", "application/json");
}
else
{
res.set_content("{"status":"1","msg":"fail"}", "application/json");
} });

void VirtualMeal::registerHostMachine(const HostMachineInfo &hostMachineInfo, const string &ip, int port)
{
httplib::Client client(ip, port);
cJSON *hostMachineJson = cJSON_CreateObject();
cJSON_AddStringToObject(hostMachineJson, "sn", hostMachineInfo.sn.c_str());
agentServerLog(FUNCTION, LINE, "hostMachineJson", cJSON_Print(hostMachineJson));
auto res = client.Post("/registerHostInfo", cJSON_Print(hostMachineJson), "application/json");
if (res)
{
agentServerLog(FUNCTION, LINE, "res->status", res->status);
agentServerLog(FUNCTION, LINE, "res->body", res->body);
}
}

Running in the Linux environment, some environments can run normally, and some do not

[yhirose]

It looks like cJSON *hostMachineJson = cJSON_CreateObject(); isn't freed.