SIGSEGV Segmentation Fault after connectToHostEncrypted

SGaist

Can you show your .pro file ?

Which Linux distribution are you using ?
Which version of GDB ?

KapitanF

Debugger is:
GNU gdb (GDB) Fedora 8.0-20.fc26

OS:
Fedora 26 (last update kernel 4.11.11-300)

Here is .pro file:
[0_1502664502899_QtSslReceiver.pro](Uploading 100%)

KapitanF

Some other ideas?

mrjj

@KapitanF

Hi
All we see it
[0_1502664502899_QtSslReceiver.pro](Uploading 100%)

Do you see real images?

KapitanF

No ,i see only [0_1502664502899_QtSslReceiver.pro](Uploading 100%), i not see real images.

karlheinzreichel

To localize the problem it could be a good idea to use the qt-libraries with symbols (debug version of qt-build)

KapitanF

Hi Karl, thanks for Reply, where i find the debug version of qt-build?

KapitanF

All needed QT files installed on my OS. I know, Debug not work only on my application! Is it SIGNAL from kernel OS, which raise exception SIGSEGV, or is it application compile/dynamic linker error. Is problem in QMAKE, GCC, GDB or CMAKE?

KapitanF

Any ideas?

mrjj

@KapitanF
since none of the images or code is shown, it hard to guess at anything. :)

KapitanF

Ok i understand. I have not permissions to Drag and Drop! Ho i enable it?

KapitanF

main.cpp : https://pastebin.com/cPjTKygq
qtsslreceiver.cpp : https://pastebin.com/dEtj6E7n
qtsslreceiver.h : https://pastebin.com/TzcktAay
qtsslreceiver.pro : https://pastebin.com/KujH0e8k
qtsslreceiver.ui : https://pastebin.com/kLxVkFxE

I dont know, how enable Drag and Drop for this forum.

mrjj

Hi
One thing that i noted.
you define
QSslSocket *msocket;
but do not set to nullptr
and then use it later


void QtSslReceiver::OnConnect(const QString &hostname,unsigned short port)
{
    if (!msocket) <<<< Might not be null, might be random value here
    {
        msocket = new QSslSocket(this);
    xx
    }

    msocket->ignoreSslErrors(); <<< Might crash here

To check if that
just try
msocket=nullptr; ( or set it to null in .h)
OnConnect("kapitanf.ddns.net", 5000);

Thats stops it crashing here when i run it.

KapitanF

Hi mrjj, thank you for Solution. Now application work right. THANK you very much.

mrjj

Oh super . it was only that. the revenge of the uninitialized variable. ;)