Description of problem: x2go allows creating and displaying a terminal on a remote system. It uses ssh and xauth to set up an x connection. This fails when the user's homedir on the remote system contains a directory named like the hostname. For example: remote host is "myhost.mynet" homedir of remote user contains subdir myhost => xauth crashes (not sure how it is actually invoked): dmesg -T reports xauth[14378]: segfault at 1 ip 00007f5aabbc6365 sp 00007ffc61339498 error 4 in libc-2.30.so[7f5aabb46000+14f000] [Wed Aug 19 15:57:40 2020] Code: bc d1 f3 0f 7f 27 f3 0f 7f 6f 10 f3 0f 7f 77 20 f3 0f 7f 7f 30 49 83 c0 0f 49 29 d0 48 8d 7c 17 31 e9 9f 0b 00 00 66 0f ef c0 <f3> 0f 6f 0e f3 0f 6f 56 10 66 0f 74 c1 66 0f d7 d0 49 83 f8 11 0f Also two lock files are left: .Xauthority-l and .Xauthority-c making any future xauth call timeout. Version-Release number of selected component (if applicable): rpm -q -f /usr/bin/xauth xorg-x11-xauth-1.1-2.fc31.x86_64 rpm -q -a|grep x2go x2goserver-4.1.0.3-5.fc31.x86_64 x2goclient-4.1.2.1-5.fc31.x86_64 x2goserver-common-4.1.0.3-5.fc31.noarch x2goagent-4.1.0.3-5.fc31.x86_64 x2goserver-xsession-4.1.0.3-5.fc31.noarch How reproducible: Always Steps to Reproduce: 1. test that x2go actually works on 2. stop x2go session and on the remote system mkdir ~/remotehost 3. try the test in 1 again. x2go reports a problem Error: Aborting session with 'Unable to open display 'nx/nx,options=/tmp/.x2go-xxx/C-xxx-50-1597844645_stRterminator_dp24/options:50''. Session: Aborting session at 'Wed Aug 19 15:44:21 2020'. Session: Session aborted at 'Wed Aug 19 15:44:21 2020'. Loop: WARNING! Signals were not blocked in process with pid '105256'. Warning: Signals were not blocked in process with pid '105256'. Info: Your session has died before reaching an usable state. Info: This can be due to the remote X server refusing access to the client. Info: Please check the authorization provided by your X application. Info: Waiting the cleanup timeout to complete. Lock files remain: .Xauthority-c .Xauthority-l Actual results: x2go not working; xauth stops working until lock files are removed Expected results: No weird behaviour. Additional info: After removing the empty directory and the lock files all works fine again.
Thanks for the detailed bug description. I was able to reproduce the bug and I will now start investigating the root cause.
Fixed. Please take a look at https://koji.fedoraproject.org/koji/taskinfo?taskID=49730330 and let me know, if its works. The patch will be sent upstream, as this is a bug in xauth.
I installed the new rpm and tested. Problem is now solved. Thanks for the quick response.
Merged upstream: https://gitlab.freedesktop.org/xorg/app/xauth/-/commit/18a3c3a7672ff5d65bf0b79b89464eac7540b95b
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