[Linux-gpib-general] Segfault in python bindings

[Matthias G. <m_g...@wi...>]

Hi,
I came across a segfault in the python bindings for GPIB.
This is with the bitbang kernel module on a Raspberry Pi 4 running 
raspbian trixie and the python3-gpib package installed from Debian unstable.
This can be reproduced like this:
<http://intraserv.common.wiwa.loc/gitlab/><http://intraserv.common.wiwa.loc/gitlab/><http://intraserv.common.wiwa.loc/gitlab/><http://intraserv.common.wiwa.loc/gitlab/>
<http://intraserv.common.wiwa.loc/gitlab/>

sudo modprobe gpib_bitbang
sudo /sbin/gpib_config
export DEBUGINFOD_URLS="https://debuginfod.debian.net"
gdb --args python3 -i
(gdb) run
(gdb) >>> import gpib
(gdb) >>> dev = gpib.dev(0, 9)
(gdb) >>> gpib.write(dev, ":ID?")
(gdb) 8448
(gdb) >>> gpib.read(dev, 9999)
(gdb) b'HP3488A\r\n
(gdb) >>> gpib.read(9999, dev)
libgpib: invalid descriptor
Segmentation fault
(gdb) bt

Trying to read the wrong way should result in type error from python. I 
attached the backtrace; let me know if you need any additional info.

-- 
Freundliche Grüsse / Best regards

Matthias Geiger
__________________________________________________________________
Matthias Geiger
Werkstudent
Forschung & Entwicklung/Research & Development

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