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https://issues.apache.org/jira/browse/GUACAMOLE-1902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17806126#comment-17806126
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Nick Couchman commented on GUACAMOLE-1902:
------------------------------------------
[~libor.svehlak]: A PR was just merged as part of GUACAMOLE-1900 - are you able
to check out the staging/1.5.5 branch and see if that resolves the issue you're
seeing?
> SIGSEGV in __guac_common_surface_touch_rect for telnet and SSH
> --------------------------------------------------------------
>
> Key: GUACAMOLE-1902
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-1902
> Project: Guacamole
> Issue Type: Bug
> Components: SSH, Telnet
> Affects Versions: 1.5.4
> Environment: OS: SLES 12.5
> Versions of libraries used during compilation of guacd:
> * libtelnet: 0.23
> * libssh2: 1.11.0
> * freerdp: 2.11.1
> * openssl: 1.1.1w
> * LibVNCServer: 0.9.14
> Reporter: Libor Svehlak
> Priority: Blocker
>
> After update from version 1.5.3 to 1.5.4 we are facing with core dumps when
> using Telnet or SSH:
> {noformat}
> Program terminated with signal SIGSEGV, Segmentation fault.
> {noformat}
> In both cases function {{__guac_common_surface_touch_rect}} is causing the
> SIGSEGV.
> Stack trace for telnet:
> {noformat}
> #0 0x00007f7988c5eef3 in __guac_common_surface_touch_rect () from
> /opt/guacd/lib/libguac-client-telnet.so
> #1 0x00007f7988c60268 in guac_common_surface_draw () from
> /opt/guacd/lib/libguac-client-telnet.so
> #2 0x00007f7988c35eda in __guac_terminal_set () from
> /opt/guacd/lib/libguac-terminal.so.0
> #3 0x00007f7988c36f77 in __guac_terminal_display_flush_set () from
> /opt/guacd/lib/libguac-terminal.so.0
> #4 0x00007f7988c36fdc in guac_terminal_display_flush () from
> /opt/guacd/lib/libguac-terminal.so.0
> #5 0x00007f7988c3b358 in guac_terminal_flush () from
> /opt/guacd/lib/libguac-terminal.so.0
> #6 0x00007f7988c39b07 in guac_terminal_render_frame () from
> /opt/guacd/lib/libguac-terminal.so.0
> #7 0x00007f7988c390dc in guac_terminal_thread () from
> /opt/guacd/lib/libguac-terminal.so.0
> #8 0x00007f798d44b71a in start_thread () from /lib64/libpthread.so.0
> #9 0x00007f798cffe21d in clone () from /lib64/libc.so.6
> {noformat}
> Stack trace for SSH:
> {noformat}
> #0 0x00007f4b5c9831f0 in __guac_common_surface_touch_rect () from
> /opt/guacd/lib/libguac-client-ssh.so
> #1 0x00007f4b5c984565 in guac_common_surface_draw () from
> /opt/guacd/lib/libguac-client-ssh.so
> #2 0x00007f4b5c913eda in __guac_terminal_set () from
> /opt/guacd/lib/libguac-terminal.so.0
> #3 0x00007f4b5c914f77 in __guac_terminal_display_flush_set () from
> /opt/guacd/lib/libguac-terminal.so.0
> #4 0x00007f4b5c914fdc in guac_terminal_display_flush () from
> /opt/guacd/lib/libguac-terminal.so.0
> #5 0x00007f4b5c919358 in guac_terminal_flush () from
> /opt/guacd/lib/libguac-terminal.so.0
> #6 0x00007f4b5c917b07 in guac_terminal_render_frame () from
> /opt/guacd/lib/libguac-terminal.so.0
> #7 0x00007f4b5c9170dc in guac_terminal_thread () from
> /opt/guacd/lib/libguac-terminal.so.0
> #8 0x00007f4b6117371a in start_thread () from /lib64/libpthread.so.0
> #9 0x00007f4b60d2621d in clone () from /lib64/libc.so.6
> {noformat}
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