smbspool segmentation fault

[mannheim]

The version of smbspool in the package smbclient-3.0.22-1ubuntu1 (dapper) fails with a segmentation fault. To reproduce the bug, in the terminal:

$ DEVICE_URI="smb://user:secret@GROUP/MYPC/Canon"
$ export DEVICE_URI
$ echo something | smbspool 99 me test 1 ""
Segmentation fault

This is 100% reproducible on my two machines. Reverting to the older copy of smbspool from the older package smbclient-3.0.21b-1ubuntu1 fixed the problem.

This bug shows up as a failure of printing from dapper via cups and samba to shared printers. This bug was previously reported as Bug #39484, attributed to the package "cups". Since the user interface of launchpad doesn't let me change the attribution to "smbclient", I am filing this duplicate bug.

[Eli Goshorn (techeli)]

Confirmed on AMD64, so it most probably is a problem upstream. Set severity to major because _many_ people need to print to printers hooked up to Windows machines.

[casualprogrammer (casualprogrammer)]

I get the same problem after having installed Ubuntu 6.06 flight 6 on another PC ( i386 ). I created a network printer to connect to a Windows XP workstation ( Canon PIXMA iP4000 ) and it worked fine.

After applying all actual updates, the printer fails to work.

The cups error log shows:

E [17/Apr/2006:06:44:17 +0200] cupsdAuthorize: Local authentication certificate not found!
E [17/Apr/2006:06:44:17 +0200] cupsdAuthorize: Local authentication certificate not found!
E [17/Apr/2006:06:44:21 +0200] cupsdAuthorize: Local authentication certificate not found!
E [17/Apr/2006:06:44:21 +0200] Resume-Printer: Unauthorized
E [17/Apr/2006:06:44:21 +0200] PID 6113 crashed on signal 11!

I am not using certificates,so why cups would ask for them is over my head.

[Bazon (bazonbloch)]

Is it usefull to edit a bug which has been marked as a duplicate?
Maybe you should write comments/change status in the other entry:

https://launchpad.net/distros/ubuntu/+source/samba/+bug/39484
(that one has still status "normal" eg. ...)

Anyway, if you want a quick solution look here:
http://ubuntuforums.org/showthread.php?p=922871#post922871
(replace /usr/bin/smbspool by an older version...)

[Soren Hansen (soren)]

I've located the error. It's due to the ubuntu-setlocale.patch that was applied in version 3.0.22-1ubuntu1. That patch uses a table which is filled in at initialisation time to look up the uppercase version of all unicode letters. If this table is not yet initialised, it will result in a segfault.

I think the proper way to fix this is to always check if a certain initialisation function has been called before allowing anything at all to happen, but I suppose that decision is up to the samba developers. For now this patch which just adds a call to load_case_tables() in the beginning of smbspool.c, will probably do just fine. This approach is also used by smbclient and smbmount.

The attached file replaces the current ubuntu-setlocale.patch currently present in debian/patches in the samba source package.

[brettatoms (brettatoms)]

Has this patch made it into the samba packages? I'm still getting crashes.

[brettatoms (brettatoms)]

Sorry for the spam. I just read the answer in #39484.