Bug#961345: cups: daemon crashes with invalid free()

[Bernhard Übelacker <bernhardu@mailbox.org>]

Hello Ronny,


Am 24.08.20 um 13:12 schrieb Ronny Adsetts:

> The "bt full" on a recent crash:

Unfortunately I cannot find something striking.



>> Otherwise running cupsd within valgrind could also give some hints.
> 
> I'll see if I can do this. I'll have to schedule some down time so it won't be immediate (or possibly even quick).

I tried to run it in a VM and tested with some virtual PDF and PS printer.
Following were the configuration changes to have it run under valgrind.

    nano /lib/systemd/system/cups.service

        -ExecStart=/usr/sbin/cupsd -l
        +# ExecStart=/usr/sbin/cupsd -l
        +ExecStart=/usr/bin/valgrind --trace-children=no /usr/sbin/cupsd -l

    systemctl daemon-reload
    systemctl stop cups.service
    systemctl start cups.service


But I don't know if that might create a problem perfomance wise.


I have tried to build with AddressSanitizer, but the build itself makes
trouble and the resulting binary is not able to print...


Kind regards,
Bernhard