[Bug 252534] net/libvncserver - 0.9.12_2 - SIGBUS in rfbClientDesKey with example program

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252534

            Bug ID: 252534
           Summary: net/libvncserver - 0.9.12_2 - SIGBUS in
                    rfbClientDesKey with example program
           Product: Ports & Packages
           Version: Latest
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: nc at FreeBSD.org
          Reporter: will.brokenbourgh2877 at gmail.com
             Flags: maintainer-feedback?(nc at FreeBSD.org)
          Assignee: nc at FreeBSD.org

- FreeBSD 12.2-RELEASE-p1 running on amd64 architecture
- libvncserver 0.9.12_2 - binary package installed from 'pkg install'

After building and running the SDLvncviewer.c example program at:

https://libvnc.github.io/doc/html/_s_d_lvncviewer_8c-example.html

I attempted to connect to any TightVNC server running on Windows 7 or 10 and
receive the following error (gdb output):

(gdb) r
Starting program: /usr/home/will/Projects/sdl-vnc-viewer/sdlvncviewer
192.168.0.128
08/01/2021 13:52:51 VNC server supports protocol version 3.8 (viewer 3.8)
08/01/2021 13:52:51 We have 2 security types to read
08/01/2021 13:52:51 0) Received security type 2
08/01/2021 13:52:51 Selecting security type 2 (0/2 in the list)
08/01/2021 13:52:51 1) Received security type 16
08/01/2021 13:52:51 Selected Security Scheme 2
Password: 

Program received signal SIGBUS, Bus error.
0x000000080026b3e5 in rfbClientDesKey () from /usr/local/lib/libvncclient.so.1
(gdb) bt     
#0  0x000000080026b3e5 in rfbClientDesKey () from
/usr/local/lib/libvncclient.so.1
#1  0x000000080026afba in rfbClientEncryptBytes () from
/usr/local/lib/libvncclient.so.1
#2  0x000000080025c9d9 in ?? () from /usr/local/lib/libvncclient.so.1
#3  0x000000080025b4e8 in InitialiseRFBConnection () from
/usr/local/lib/libvncclient.so.1
#4  0x0000000800272bee in rfbInitClient () from
/usr/local/lib/libvncclient.so.1
#5  0x0000000000202de1 in main (argc=2, argv=0x7fffffffda48) at
sdlvncviewer.c:446

This appears to be an issue only on FreeBSD as building and running this works
fine on Linux.

Build command line was:

$ cc -Wall -o sdlvncviewer sdlvncviewer.c -I/usr/local/include -I/usr/include
-I/usr/local/include/SDL2 -L/usr/local/lib -lvncclient -lSDL2 -O0 -g

$ cc --version
FreeBSD clang version 10.0.1 (git at github.com:llvm/llvm-project.git
llvmorg-10.0.1-0-gef32c611aa2)
Target: x86_64-unknown-freebsd12.2
Thread model: posix
InstalledDir: /usr/bin

Thank you! :-)

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