Client: build 11250 crashing repeatingly on win7

[yasuoiwakura]

Expected behaviour

Owncloud client used to run days, weeks and months BEFORE client update

Actual behaviour

Client 2.5.3 (build 11250) crashes several times a day. The taskbar icon will stay until i move the mouse cursor over the icon

Steps to reproduce

• Crashes now and then without any noticable trigger
• Rescently, it crashes REPLICABLE when checking one directory share using the explorer context menu

last message in logfile (i would prefer not to share the WHOLE logfile to the world):
02-17 13:14:10:657 [ info gui.socketapi ]: Lost connection QLocalSocket(0xe765248) 02-17 13:14:10:657 [ info gui.socketapi ]: Received SocketAPI message <-- "SHARE:D:\\Daten\\cloud.blox.media\\Dir1\\Dir2\\Dir3" from QLocalSocket(0xe765248)

Server configuration

Operating system:
Ubuntu 16.04.5 LTS (GNU/Linux 4.4.0-042stab134.8 x86_64)
Web server:
ii apache2 2.4.18-2ubuntu3.9 amd64 Apache HTTP Server ii apache2-bin 2.4.18-2ubuntu3.9 amd64 Apache HTTP Server (modules and other binary files) ii apache2-data 2.4.18-2ubuntu3.9 all Apache HTTP Server (common files) ii apache2-utils 2.4.18-2ubuntu3.9 amd64 Apache HTTP Server (utility programs for web servers) ii libapache2-mod-php7.0 7.0.33-0ubuntu0.16.04.1 amd64 server-side, HTML-embedded scripting language (Apache 2 module)

Database:
ii mysql-server 5.7.25-0ubuntu0.16.04.2 all MySQL database server (metapackage depending on the latest version)

PHP version:
ii php7.0 7.0.33-0ubuntu0.16.04.1 all server-side, HTML-embedded scripting language (metapackage)

ownCloud version:
ii owncloud-files 10.0.9-1+1.1

Storage backend (external storage):

Client configuration

Client version:
2.5.3 (build 11250)
Operating system:
Win7 pro sp1

OS language:
german

Qt version used by client package (Linux only, see also Settings dialog):

Client package (From ownCloud or distro) (Linux only):

Installation path of client:
"C:\Program Files (x86)\ownCloud\"

Logs

1. Client logfile:
   02-17 13:14:10:657 [ info gui.socketapi ]: Lost connection QLocalSocket(0xe765248) 02-17 13:14:10:657 [ info gui.socketapi ]: Received SocketAPI message <-- "SHARE:D:\\Daten\\cloud.blox.media\\Dir1\\Dir2\\Dir3" from QLocalSocket(0xe765248)

2. Web server error log:
   nothing regarding OC

3. Server logfile: ownCloud log (data/owncloud.log):
   todays entries:
   {"reqId":"ICHANGEDTHIS","level":2,"time":"2019-02-17T05:07:52+00:00","remoteAddr":"104.131.137.66","user":"--","app":"core","method":"GET","url":"\/","message":"Trusted domain error. \"104.131.137.66\" tried to access using \"85.214.112.18\" as host."}

[yasuoiwakura]

p-de44f011-1e15-4bf8-96c4-292042190217 i

[ckamm]

Sentry link: https://sentry.io/owncloud/desktop-win-and-mac/issues/862016382/events/46576784640/ shows this crash appearing from 2.5.2 onwards.

Backtrace:

Crash: EXCEPTION_ACCESS_VIOLATION_READ at 0x13a40fe6
  Module "Qt5Core.dll", in operator<<(QDebug,QObject
  Module "owncloud.exe", in OCC::SocketListener::sendMessage(QString
  Module "owncloud.exe", in OCC::SocketApi::processShareRequest(QString
  Module "owncloud.exe", in OCC::SocketApi::command_SHARE(QString
  Module "owncloud.exe", in OCC::SocketApi::qt_static_metacall(QObject
  Module "Qt5Core.dll", in QMetaMethod::invoke(QObject
  File "socketapi.cpp", in OCC::SocketApi::slotReadSocket()
  Module "Qt5Core.dll", in QMetaObject::activate(QObject
  Module "Qt5Core.dll", in QMetaObject::activate(QObject
  Module "Qt5Core.dll", in QMetaObject::activate(QObject

The QObject being passed to qDebug here is the SocketListener's socket. There hasn't been a change to the relevant code recently so this is probably due to a Qt upgrade.

[ckamm]

On further reading: This is a consequence of 0bfe7ac250c54f5415c0a794c7b271428e83c3cf. It's possible to get a disconnected() and then a readyRead() from the socket. The disconnect will remove the listener and then the data will be read and the handler will be invoked with an empty listener.

[ckamm]

PR: https://github.com/owncloud/client/pull/7045

[guruz]

@yasuoiwakura We have a daily build with this fix here: https://download.owncloud.com/desktop/daily/ownCloud-2.5.4.11526.11353-daily20190220.msi
Would you try this one and report back if it fixes the issue? Thank you

[ingogoeppert]

I have the same problems since version 2.5.2. ownCloud-2.5.4.11526.11353-daily20190220.msi fixed the issue for me.

[yasuoiwakura]

@yasuoiwakura We have a daily build with this fix here: https://download.owncloud.com/desktop/daily/ownCloud-2.5.4.11526.11353-daily20190220.msi
Would you try this one and report back if it fixes the issue? Thank you

sorry the the late reply.

no more crashes so far - thanks for the quick fix!