#544 Access violatoin attempting to connect using SSL

[Anonymous]

Originally created by: varbanse... (code.google.com)@gmail.com

What steps will reproduce the problem?
1.Open transgui
2.Attempt to connect
3.

What is the expected output? What do you see instead?
I see an access violation popup.
This shows in the shell:

TApplication.HandleException Access violation
  Stack trace:
  $00007F23203D26F1

What version of the product are you using? On what operating system?
Latest build from trunk using lazarus 0.9.30.4 and fpc-2.6.0

Please provide any additional information below.
This was working fine until I upgraded my debian sid instace today, here is a list of packages included in this update and their old/new versions:

acpid:amd64 (2.0.15-2, 2.0.16-1),
acpi-support-base:amd64 (0.140-1, 0.140-3),
aptdaemon:amd64 (0.43+bzr769-1, 0.43+bzr790-1),
aptdaemon-data:amd64 (0.43+bzr769-1, 0.43+bzr790-1),
bash:amd64 (4.2-1, 4.2-2),
cpp-4.6:amd64 (4.6.3-1, 4.6.3-2),
cpp:amd64 (4.6.3-3, 4.6.3-4),
cups-filters:amd64 (1.0.11-1, 1.0.12-1),
cups-pdf:amd64 (2.6.1-5, 2.6.1-6),
dos2unix:amd64 (5.3.3-1, 5.3.3-2),
fonts-opensymbol:amd64 (102.2+LibO3.5.2~rc2-1, 102.2+LibO3.5.2-1),
g++-4.6:amd64 (4.6.3-1, 4.6.3-2),
g++:amd64 (4.6.3-3, 4.6.3-4),
gcc-4.6:amd64 (4.6.3-1, 4.6.3-2),
gcc-4.6-base:amd64 (4.6.3-1, 4.6.3-2),
gcc-4.7-base:amd64 (4.7.0-1, 4.7.0-2),
gcc:amd64 (4.6.3-3, 4.6.3-4),
geoip-database:amd64 (20120308-1, 20120404-1),
gir1.2-atk-1.0:amd64 (2.4.0-1, 2.4.0-2),
gir1.2-vte-2.90:amd64 (0.30.1-4, 0.32.0-2),
gnome-icon-theme:amd64 (3.2.1.2-1, 3.4.0-2),
groff-base:amd64 (1.21-6, 1.21-7),
grub2-common:amd64 (1.99-18, 1.99-21),
grub-common:amd64 (1.99-18, 1.99-21),
grub-pc:amd64 (1.99-18, 1.99-21),
grub-pc-bin:amd64 (1.99-18, 1.99-21),
gvfs:amd64 (1.10.1-3, 1.12.0-1),
gvfs-backends:amd64 (1.10.1-3, 1.12.0-1),
gvfs-common:amd64 (1.10.1-3, 1.12.0-1),
gvfs-daemons:amd64 (1.10.1-3, 1.12.0-1),
gvfs-libs:amd64 (1.10.1-3, 1.12.0-1),
imagemagick:amd64 (6.6.9.7-7, 6.7.4.0-3),
imagemagick-common:amd64 (6.6.9.7-7, 6.7.4.0-3),
inkscape:amd64 (0.48.3.1-1, 0.48.3.1-1+b1),
iso-codes:amd64 (3.33-1, 3.34-1),
kid3:amd64 (2.0.1-3, 2.0.1-4),
lib32gcc1:amd64 (4.7.0-1, 4.7.0-2),
lib32stdc++6:amd64 (4.7.0-1, 4.7.0-2),
libatk1.0-0:amd64 (2.4.0-1, 2.4.0-2),
libatk1.0-data:amd64 (2.4.0-1, 2.4.0-2),
libcanberra0:amd64 (0.28-3, 0.28-4),
libcanberra-gtk3-0:amd64 (0.28-3, 0.28-4),
libcanberra-gtk3-module:amd64 (0.28-3, 0.28-4),
libcln6:amd64 (1.3.2-1.1, 1.3.2-1.2),
libcupsfilters1:amd64 (1.0.11-1, 1.0.12-1),
libdjvulibre21:amd64 (3.5.25.2-1, 3.5.25.2-2),
libdjvulibre-text:amd64 (3.5.25.2-1, 3.5.25.2-2),
libdmtx0a:amd64 (0.7.2-2, 0.7.2-2+b1)
libdrm2:amd64 (2.4.32-1, 2.4.33-1),
libdrm-intel1:amd64 (2.4.32-1, 2.4.33-1),
libdrm-nouveau1a:amd64 (2.4.32-1, 2.4.33-1),
libdrm-radeon1:amd64 (2.4.32-1, 2.4.33-1),
libexpat1:amd64 (2.1.0~beta3-2, 2.1.0-1),
libfribidi0:amd64 (0.19.2-2, 0.19.2-3),
libgcc1:amd64 (4.7.0-1, 4.7.0-2),
libgfortran3:amd64 (4.7.0-1, 4.7.0-2),
libgomp1:amd64 (4.7.0-1, 4.7.0-2),
libhtml-form-perl:amd64 (6.02-1, 6.03-1),
libhtml-parser-perl:amd64 (3.69-1+b1, 3.69-2),
libilmbase6:amd64 (1.0.1-3, 1.0.1-4),
libjavascriptcoregtk-1.0-0:amd64 (1.6.3-2, 1.8.0-2),
liblua5.1-0:amd64 (5.1.4-12, 5.1.5-1),
libmp3lame0:amd64 (3.99.5-0.0, 3.99.5-0.1),
libmpg123-0:amd64 (1.13.7-5, 1.13.7-6),
libmtp9:amd64 (1.1.2-3, 1.1.3-1),
libmtp-common:amd64 (1.1.2-3, 1.1.3-1),
libmtp-runtime:amd64 (1.1.2-3, 1.1.3-1),
libmusicbrainz3-6:amd64 (3.0.2-2, 3.0.2-2.1),
libneon27-gnutls:amd64 (0.29.6-1, 0.29.6-2),
libnm-glib4:amd64 (0.9.4.0-1, 0.9.4.0-3),
libnm-glib-vpn1:amd64 (0.9.4.0-1, 0.9.4.0-3),
libnm-util2:amd64 (0.9.4.0-1, 0.9.4.0-3),
libopenal1:amd64 (1.13-6, 1.14-1),
libopenal-data:amd64 (1.13-6, 1.14-1),
libopenexr6:amd64 (1.6.1-4.1, 1.6.1-5),
libparted0debian1:amd64 (2.3-8, 2.3-9),
libpci3:amd64 (3.1.8-2, 3.1.9-1),
libpcsclite1:amd64 (1.8.3-1, 1.8.3-2),
libpstoedit0c2a:amd64 (3.60-2, 3.60-2+b1),
libpython2.7:amd64 (2.7.3~rc2-1, 2.7.3~rc2-2),
libqrencode3:amd64 (3.2.0-2, 3.3.0-2),
libqtruby4shared2:amd64 (4.7.1-1+b1, 4.7.4-1),
libquadmath0:amd64 (4.7.0-1, 4.7.0-2),
libreoffice-base-core:amd64 (3.5.2~rc2-1, 3.5.2-1),
libreoffice-calc:amd64 (3.5.2~rc2-1, 3.5.2-1),
libreoffice-common:amd64 (3.5.2~rc2-1, 3.5.2-1),
libreoffice-core:amd64 (3.5.2~rc2-1, 3.5.2-1),
libreoffice-draw:amd64 (3.5.2~rc2-1, 3.5.2-1),
libreoffice-impress:amd64 (3.5.2~rc2-1, 3.5.2-1),
libreoffice-java-common:amd64 (3.5.2~rc2-1, 3.5.2-1),
libreoffice-math:amd64 (3.5.2~rc2-1, 3.5.2-1),
libreoffice-style-galaxy:amd64 (3.5.2~rc2-1, 3.5.2-1),
libreoffice-writer:amd64 (3.5.2~rc2-1, 3.5.2-1),
librsvg2-2:amd64 (2.36.0-2, 2.36.0-5),
librsvg2-common:amd64 (2.36.0-2, 2.36.0-5),
libsane:amd64 (1.0.22-7, 1.0.22-7.1),
libsane-common:amd64 (1.0.22-7, 1.0.22-7.1),
libsepol1:amd64 (2.1.4-2, 2.1.4-3),
libsmokebase3:amd64 (4.7.1-1, 4.7.4-1),
libsmokekdecore4-3:amd64 (4.7.1-1, 4.7.4-1),
libsmokekdeui4-3:amd64 (4.7.1-1, 4.7.4-1),
libsmokekfile3:amd64 (4.7.1-1, 4.7.4-1),
libsmokekhtml3:amd64 (4.7.1-1, 4.7.4-1),
libsmokekio3:amd64 (4.7.1-1, 4.7.4-1),
libsmokeknewstuff2-3:amd64 (4.7.1-1, 4.7.4-1),
libsmokeknewstuff3-3:amd64 (4.7.1-1, 4.7.4-1),
libsmokekparts3:amd64 (4.7.1-1, 4.7.4-1),
libsmokektexteditor3:amd64 (4.7.1-1, 4.7.4-1),
libsmokekutils3:amd64 (4.7.1-1, 4.7.4-1),
libsmokenepomuk3:amd64 (4.7.1-1, 4.7.4-1),
libsmokeplasma3:amd64 (4.7.1-1, 4.7.4-1),
libsmokeqtcore4-3:amd64 (4.7.1-1+b1, 4.7.4-1),
libsmokeqtdbus4-3:amd64 (4.7.1-1+b1, 4.7.4-1),
libsmokeqtgui4-3:amd64 (4.7.1-1+b1, 4.7.4-1),
libsmokeqtnetwork4-3:amd64 (4.7.1-1+b1, 4.7.4-1),
libsmokeqtopengl4-3:amd64 (4.7.1-1+b1, 4.7.4-1),
libsmokeqtsql4-3:amd64 (4.7.1-1+b1, 4.7.4-1),
libsmokeqtsvg4-3:amd64 (4.7.1-1+b1, 4.7.4-1),
libsmokeqtwebkit4-3:amd64 (4.7.1-1+b1, 4.7.4-1),
libsmokeqtxml4-3:amd64 (4.7.1-1+b1, 4.7.4-1),
libsmokesolid3:amd64 (4.7.1-1, 4.7.4-1),
libssl1.0.0:amd64 (1.0.1-2, 1.0.1-4),
libssl-dev:amd64 (1.0.1-2, 1.0.1-4),
libssl-doc:amd64 (1.0.1-2, 1.0.1-4),
libstdc++6-4.6-dev:amd64 (4.6.3-1, 4.6.3-2),
libstdc++6:amd64 (4.7.0-1, 4.7.0-2),
libsystemd-login0:amd64 (37-1.1, 44-1),
libupower-glib1:amd64 (0.9.15-2, 0.9.15-3),
libusb-0.1-4:amd64 (0.1.12-20, 0.1.12-21),
libusb-1.0-0:amd64 (1.0.9~rc3-3, 1.0.9~rc3-4),
libusb-dev:amd64 (0.1.12-20, 0.1.12-21),
libvirtodbc0:amd64 (6.1.3+dfsg1-2.1, 6.1.3+dfsg1-2.1+b1),
libvte-2.90-9:amd64 (0.30.1-4, 0.32.0-2),
libvte-2.90-common:amd64 (0.30.1-4, 0.32.0-2),
libwavpack1:amd64 (4.60.1-2, 4.60.1-3),
libwebkitgtk-1.0-0:amd64 (1.6.3-2, 1.8.0-2),
libwebkitgtk-1.0-common:amd64 (1.6.3-2, 1.8.0-2),
libx264-122:amd64 (0.122.2184+git5c85e0a-0.0, 0.122.2184+git5c85e0a-0.1),
libxvidcore4:amd64 (1.3.2-0.4, 1.3.2-0.6),
libzbar0:amd64 (0.10+doc-7+b1, 0.10+doc-7+b2),
mobile-broadband-provider-info:amd64 (20120307-1, 20120402-1),
mtp-tools:amd64 (1.1.2-3, 1.1.3-1),
network-manager:amd64 (0.9.4.0-1, 0.9.4.0-3),
obex-data-server:amd64 (0.4.5-1+b2, 0.4.5-1+b3),
openconnect:amd64 (3.02-2, 3.15-2),
openssh-client:amd64 (5.9p1-4, 5.9p1-5),
openssh-server:amd64 (5.9p1-4, 5.9p1-5),
openssl:amd64 (1.0.1-2, 1.0.1-4),
pciutils:amd64 (3.1.8-2, 3.1.9-1),
perlmagick:amd64 (6.6.9.7-7, 6.7.4.0-3),
pstoedit:amd64 (3.60-2, 3.60-2+b1),
python2.7:amd64 (2.7.3~rc2-1, 2.7.3~rc2-2),
python2.7-minimal:amd64 (2.7.3~rc2-1, 2.7.3~rc2-2),
python-aptdaemon:amd64 (0.43+bzr769-1, 0.43+bzr790-1),
python-aptdaemon.gtk3widgets:amd64 (0.43+bzr769-1, 0.43+bzr790-1),
python-gi:amd64 (3.1.0-2, 3.2.0-2),
python-gobject:amd64 (3.1.0-2, 3.2.0-2),
rsyslog:amd64 (5.8.9-1, 5.8.10-1),
ruby-kde4:amd64 (4.7.1-1, 4.7.4-1),
ruby-plasma:amd64 (4.7.1-1, 4.7.4-1),
ruby-qt4:amd64 (4.7.1-1+b1, 4.7.4-1),
ruby-qt4-webkit:amd64 (4.7.1-1+b1, 4.7.4-1),
sane-utils:amd64 (1.0.22-7, 1.0.22-7.1),
synaptic:amd64 (0.75.7, 0.75.9),
ttf-opensymbol:amd64 (102.2+LibO3.5.2~rc2-1, 102.2+LibO3.5.2-1),
udisks:amd64 (1.0.4-4, 1.0.4-5),
uno-libs3:amd64 (3.5.2~rc2-1, 3.5.2-1),
unzip:amd64 (6.0-5, 6.0-6),
upower:amd64 (0.9.15-2, 0.9.15-3),
ure:amd64 (3.5.2~rc2-1, 3.5.2-1),
virtuoso-opensource-6.1-bin:amd64 (6.1.3+dfsg1-2.1, 6.1.3+dfsg1-2.1+b1),
virtuoso-opensource-6.1-common:amd64 (6.1.3+dfsg1-2.1, 6.1.3+dfsg1-2.1+b1),
xserver-xorg-input-synaptics:amd64 (1.5.99.901-1, 1.5.99.902-1),
xserver-xorg-video-cirrus:amd64 (1.3.2-4+b2, 1.4.0-1),
xserver-xorg-video-i128:amd64 (1.3.4-2+b2, 1.3.5-1),
xserver-xorg-video-intel:amd64 (2.18.0-1, 2.18.0-2),
xserver-xorg-video-mach64:amd64 (6.9.0-1+b1, 6.9.1-1),
xserver-xorg-video-radeon:amd64 (6.14.3-2, 6.14.4-1),
xserver-xorg-video-vesa:amd64 (2.3.0-7+b1, 2.3.1-1),
xserver-xorg-video-vmware:amd64 (12.0.1-1, 12.0.2-1),

[Anonymous]

Originally posted by: j...@cp-lab.com

Please build a debug version of the latest trunk using the following command:
make clean debug

Then provide the error call stack of this debug version.

Status: Feedback

[Anonymous]

Originally posted by: varbanse... (code.google.com)@gmail.com

There is nothing more, the popup says:

Access violation
---
The error details has been copied to the clipboard.
---
$00007F258058D6F1

But all that's in the clipboard is

Access violation
$00007F258058D6F1

and this is what's in the shell:

TApplication.HandleException Access violation
  Stack trace:
  $00007FB26B8A26F1
Access violation
$00007FB26B8A26F1

Is there something I need to pass to the transgui executable to get it to dump a stack trace?
Thanks!

[Anonymous]

Originally posted by: j...@cp-lab.com

The error occurs in some external lib, that's why the call stack is not available. transgui uses GTK2 widgetset, double check the gtk2 libs.
Also check if other gtk2 apps works.

[Anonymous]

Originally posted by: varbanse... (code.google.com)@gmail.com

This works fine: http://www.peazip.org/download-linux-gtk2-portable.html

What libraries are part of the gtk2 widgetset? Here are the gtk packages installed on my system

i A fp-units-gtk-2.6.0             
i A fp-units-gtk2-2.6.0            
i A gir1.2-gtk-3.0                 
i   gtk-theme-switch               
i   gtk2-engines                   
i   gtk2-engines-oxygen            
i   gtk2-engines-qtcurve           
i   ia32-libs-gtk                  
i   kde-config-gtk-style           
i A lazarus-ide-gtk2-0.9.30.2      
i A lcl-gtk2-0.9.30.2              
i   libcanberra-gtk3-0             
i   libcanberra-gtk3-module        
i   libdbusmenu-gtk3-4             
i   libdbusmenu-gtk4               
i   libgpod4-nogtk                 
i   libgtk-3-0                     
i A libgtk-3-bin                   
i A libgtk-3-common                
i   libgtk2-perl                   
i   libgtk2.0-0                    
i   libgtk2.0-0-dbg                
i   libgtk2.0-bin                  
i   libgtk2.0-common               
i A libgtk2.0-dev                  
i A libgtkmm-2.4-1c2a              
i A libgtkspell0                   
i   libjavascriptcoregtk-1.0-0     
i   libnm-gtk-common               
i   libnm-gtk0                     
i   libwebkitgtk-1.0-0             
i   libwebkitgtk-1.0-common        
i   libwxgtk2.8-0                  
i A python-aptdaemon.gtk3widgets   
i   python-gtk2                    
i A python-wxgtk2.8                
i   software-properties-gtk        

[Anonymous]

Originally posted by: varbanse... (code.google.com)@gmail.com

It looks like the issue is from the use ssl option for a connection, if I tunnel trough and disable the option I can connect to the transmission instance without a problem.
What libraries are used for the ssl functionality?

[Anonymous]

Originally posted by: varbanse... (code.google.com)@gmail.com

So it seems that libssl-1.0.0 moved the libraries from /usr/lib to /usr/lib/x86_64-linux-gnu for a 64 bit debian and that seems to break your code. I installed libssl-0.9.8 as well and it works fine now.
libssl-0.9.8 is no longer in sid so you might want to fix that or at least handle the exception better?

[Anonymous]

Originally posted by: j...@cp-lab.com

Thanks for the investigation.

transgui first tries to load libssl.so.0.9.8 and libcrypto.so.0.9.8 libs. If they not found then libssl.so and libcrypto.so are used.

Do you have libssl.so and libcrypto.so symlinks somewhere?

[Anonymous]

Originally posted by: varbanse... (code.google.com)@gmail.com

The only one I found is in /usr/lib/x86_64-linux-gnu/
It doesn't look like libssl-0.9.8 setup any generic libssl.so links.

[Anonymous]

Originally posted by: j...@cp-lab.com

transgui works with any openssl version. Do you have libssl.so and libcrypto.so symlinks by default with openssl 1.0?

[Anonymous]

Originally posted by: varbanse... (code.google.com)@gmail.com

Yes, and here is the output from ldconfig showing the libssl.so and libcrypto.so references are correct and exist (this is with libssl-0.9.8 removed)

ldconfig -p | grep libssl
        libssl3.so.1d (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libssl3.so.1d
        libssl3.so.1d (libc6) => /usr/lib32/libssl3.so.1d
        libssl3.so (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libssl3.so
        libssl3.so (libc6) => /usr/lib32/libssl3.so
        libssl.so.1.0.0 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0
        libssl.so.0.9.8 (libc6, hwcap: 0x0008000000008000) => /usr/lib32/i686/cmov/libssl.so.0.9.8
        libssl.so.0.9.8 (libc6, hwcap: 0x0004000000000000) => /usr/lib32/i586/libssl.so.0.9.8
        libssl.so.0.9.8 (libc6, hwcap: 0x0002000000000000) => /usr/lib32/i486/libssl.so.0.9.8
        libssl.so.0.9.8 (libc6) => /usr/lib32/libssl.so.0.9.8
        libssl.so (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libssl.so

ldconfig -p | grep libcrypto
        libcrypto.so.1.0.0 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0
        libcrypto.so.0.9.8 (libc6, hwcap: 0x0008000000008000) => /usr/lib32/i686/cmov/libcrypto.so.0.9.8
        libcrypto.so.0.9.8 (libc6, hwcap: 0x0004000000000000) => /usr/lib32/i586/libcrypto.so.0.9.8
        libcrypto.so.0.9.8 (libc6, hwcap: 0x0002000000000000) => /usr/lib32/i486/libcrypto.so.0.9.8
        libcrypto.so.0.9.8 (libc6) => /usr/lib32/libcrypto.so.0.9.8
        libcrypto.so (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libcrypto.so
        libcrypto++.so.9 (libc6,x86-64) => /usr/lib/libcrypto++.so.9

I wonder if the libssl.so.0.9.8 link to the 32bit libraries is causing the problem? Does your code check for arch compatibility?

[Anonymous]

Originally posted by: j...@cp-lab.com

Fixed in [r740]. Please test.

Summary: Access violatoin attempting to connect using SSL
Status: DevFixed

[Anonymous]

Originally posted by: varbanse... (code.google.com)@gmail.com

It works now, thanks!
Looking at the code you will have this issue again later when the libssl version changes.
Some google search results suggest that the 32bit libssl-0.9.8 provided by the ia32-libs package could be the cause of the error. Apparently the LoadLibrary call would either throw the Access Violation error when attempting to load the 32bit library or when you try to use it. In either case some error handling around the LoadLibrary call and when you try to use it might be a more permanent solution.
Thanks again for your work, it's a very helpful tool!

[Anonymous]

Originally posted by: j...@cp-lab.com

The error has been caused by passing NULL handle to the FreeLibrary(). It is not related to 32-bit libs. Now the code has been changed to avoid AV error. The proper error message about missing OpenSSL libs will be displayed.

[Anonymous]

Originally posted by: j...@cp-lab.com

(No comment was entered for this change.)

Status: Fixed