[
https://issues.apache.org/jira/browse/GUACAMOLE-816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16862979#comment-16862979
]
Lukas Krempler edited comment on GUACAMOLE-816 at 6/13/19 12:03 PM:
--------------------------------------------------------------------
*Are you using SSL/TLS with VNC?*
No, we use VNC without SSL/TLS (SecurityType None)
*Here ist the Stacktrace from gdb:*
(gdb) run
Starting program: /usr/sbin/guacd
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
guacd[7612]: INFO: Guacamole proxy daemon (guacd) version 0.9.9 started
guacd[7612]: DEBUG: Unable to bind socket to host ::1, port 4822: Address
family not supported by protocol
guacd[7612]: DEBUG: Successfully bound socket to host 127.0.0.1, port 4822
[New process 7616]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
guacd[7612]: DEBUG: Exiting and passing control to PID 7616
[New process 7617]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
guacd[7616]: DEBUG: Exiting and passing control to PID 7617
[New process 7618]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[tcsetpgrp failed in terminal_inferior: No such process]
[New Thread 0x7fffeeb3e700 (LWP 7621)]
[New Thread 0x7fffed311700 (LWP 7622)]
[New Thread 0x7fffecb10700 (LWP 7623)]
[New Thread 0x7fffe7fff700 (LWP 7626)]
[Thread 0x7fffe7fff700 (LWP 7626) exited]
[New Thread 0x7fffe7fff700 (LWP 7627)]
[Thread 0x7fffe7fff700 (LWP 7627) exited]
[New Thread 0x7fffe7fff700 (LWP 7628)]
[Thread 0x7fffe7fff700 (LWP 7628) exited]
[Thread 0x7fffecb10700 (LWP 7623) exited]
[Thread 0x7fffed311700 (LWP 7622) exited]
Thread 4.1 "guacd" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff7fe0880 (LWP 7618)]
0x00007ffff382ae99 in guac_common_ssh_destroy_sftp_filesystem () from
/usr/lib/x86_64-linux-gnu/libguac-client-vnc.so
(gdb) backtrace
#0 0x00007ffff382ae99 in guac_common_ssh_destroy_sftp_filesystem () from
/usr/lib/x86_64-linux-gnu/libguac-client-vnc.so
#1 0x00007ffff38266ea in vnc_guac_client_free_handler () from
/usr/lib/x86_64-linux-gnu/libguac-client-vnc.so
#2 0x00007ffff7bcdbf2 in guac_client_free () from
/usr/lib/x86_64-linux-gnu/libguac.so.11
#3 0x000055555555671e in ?? ()
#4 0x00007ffff73c02e1 in __libc_start_main (main=0x555555555e40, argc=1,
argv=0x7fffffffe678, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7fffffffe668) at ../csu/libc-start.c:291
#5 0x000055555555699a in ?? ()
was (Author: l.krempler):
*Are you using SSL/TLS with VNC?*
No, we use VNC without SSL/TLS (SecurityType None)
*Here ist the Stacktrace from gdb:*
(gdb) run
Starting program: /usr/sbin/guacd
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
guacd[7612]: INFO: Guacamole proxy daemon (guacd) version 0.9.9 started
guacd[7612]: DEBUG: Unable to bind socket to host ::1, port 4822: Address
family not supported by protocol
guacd[7612]: DEBUG: Successfully bound socket to host 127.0.0.1, port 4822
[New process 7616]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
guacd[7612]: DEBUG: Exiting and passing control to PID 7616
[New process 7617]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
guacd[7616]: DEBUG: Exiting and passing control to PID 7617
[New process 7618]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[tcsetpgrp failed in terminal_inferior: No such process]
[New Thread 0x7fffeeb3e700 (LWP 7621)]
[New Thread 0x7fffed311700 (LWP 7622)]
[New Thread 0x7fffecb10700 (LWP 7623)]
[New Thread 0x7fffe7fff700 (LWP 7626)]
[Thread 0x7fffe7fff700 (LWP 7626) exited]
[New Thread 0x7fffe7fff700 (LWP 7627)]
[Thread 0x7fffe7fff700 (LWP 7627) exited]
[New Thread 0x7fffe7fff700 (LWP 7628)]
[Thread 0x7fffe7fff700 (LWP 7628) exited]
[Thread 0x7fffecb10700 (LWP 7623) exited]
[Thread 0x7fffed311700 (LWP 7622) exited]
Thread 4.1 "guacd" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff7fe0880 (LWP 7618)]
0x00007ffff382ae99 in guac_common_ssh_destroy_sftp_filesystem () from
/usr/lib/x86_64-linux-gnu/libguac-client-vnc.so
> Segfaults in libguac-client-vnc
> -------------------------------
>
> Key: GUACAMOLE-816
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-816
> Project: Guacamole
> Issue Type: Bug
> Components: libguac, VNC
> Affects Versions: 1.0.0
> Environment: Debian 9.9 Stretch
> Reporter: Lukas Krempler
> Priority: Minor
>
> There are no troubles in the functions of guacamole. But there are some log
> entries in our syslog file:
> hostname kernel: [790049.145417] guacd[4661]: segfault at 78 ip
> 00007f70a34fee99 sp 00007ffe7fda2b50 error 4 in
> libguac-client-vnc.so.0.0.0[7f70a34f4000+f000]
> hostname guacd[4661]: Client disconnected
> The SSH and VNC connections are working without any problems.
> It seems that the segfault occurs on a client disconnect.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
