[jira] [Created] (GUACAMOLE-1902) SIGSEGV in __guac_common_surface_touch_rect for telnet and SSH

[Libor Svehlak (Jira)]

Libor Svehlak created GUACAMOLE-1902:
----------------------------------------

             Summary: 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


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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