[Pkg-utopia-maintainers] Bug#1122088: [ sudo NetworkManager --no-daemon ] Segmentation fault

[Jean-Marc LACROIX]

Package:   network-manager
Version:   1.52.1-1
Severity:  grave

Dear maintainers,

I am trying to run Network-manager on a Debian Trixie 13.2 installation 
on one amd64 target (MacBook Pro 2011 13-inch).

My configuration is ...

ansible at hn-macbookpro-440:~$ uname -a
Linux hn-macbookpro-440 6.12.57+deb13-amd64 #1 SMP PREEMPT_DYNAMIC 
Debian 6.12.57-1 (2025-11-05) x86_64 GNU/Linux


ansible at hn-macbookpro-440:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 13 (trixie)
Release:        13
Codename:       trixie
ansible at hn-macbookpro-440:~$

ansible at hn-macbookpro-440:~$ dpkg -l |grep -v ii
Desired=Unknown/Install/Remove/Purge/Hold
| 
Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                                         Version 
              Architecture Description
+++-============================================-
ansible at hn-macbookpro-440:~$

ansible at hn-macbookpro-440:~$ apt policy network-manager
network-manager:
   Installed: 1.52.1-1
   Candidate: 1.52.1-1
   Version table:
      1.54.1-1 80
          80 http://ftp.de.debian.org/debian forky/main amd64 Packages
  *** 1.52.1-1 500
         500 http://ftp.de.debian.org/debian trixie/main amd64 Packages
         100 /var/lib/dpkg/status
      1.42.4-1+deb12u1 90
          90 http://ftp.de.debian.org/debian bookworm/main amd64 Packages
ansible at hn-macbookpro-440:~$


My target has one physical Ethernet on RJ45 (if-lan) with dedicated 
VLANs in respect of my network infrastructure.

All logical network interfaces connected to the physical if-lan 
interface are managed by ifup/fdown, so only the roadwarrior interface 
(if-sta0) is used to manage the external connection when this laptop is 
out of the office.

As a result, Network-manager is configure as follow :

ansible at hn-macbookpro-440:~$ cat /etc/NetworkManager/NetworkManager.conf 
  |grep -v "#" |grep -v ^$
[main]
plugins=ifupdown,keyfile
dhcp=dhclient
no-auto-default=if-lan
no-auto-default=if-lan.6
no-auto-default=if-service
no-auto-default=if-lan.7
no-auto-default=if-lan.9
no-auto-default=if-admin
no-auto-default=if-lan.8
no-auto-default=if-user
no-auto-default=if-pixel-8
no-auto-default=if-lan
wifi-wext-only=false
[ifupdown]
managed=false
[logging]
level=DEBUG
domains=ETHER,WIFI,DHCP4,WIFI_SCAN,IP4


I hope this will ensure that Network-manager always ignores the state of 
this physical interface (if-lan), but i a m not sure (?)

Before launching NM, i make some tests....

ansible at hn-macbookpro-440:~$ sudo NetworkManager --no-daemon 
--print-config
# NetworkManager configuration: /etc/NetworkManager/NetworkManager.conf, 
/usr/lib/NetworkManager/conf.d/{20-connectivity-debian.conf,no-mac-addr-change.conf}

[main]
# rc-manager=auto
# migrate-ifcfg-rh=false
# auth-polkit=true
# iwd-config-path=
plugins=ifupdown,keyfile
dhcp=dhclient
no-auto-default=if-lan
wifi-wext-only=true
configure-and-quit=no

[connectivity]
uri=http://network-test.debian.org/nm

[ifupdown]
managed=true

[logging]
# backend=journal
# audit=true
level=DEBUG
domains=ETHER,WIFI,DHCP4,WIFI_SCAN,IP4

[device]
# wifi.backend=wpa_supplicant

[device-31-mac-addr-change]
match-device=driver:eagle_sdio,driver:wl
wifi.scan-rand-mac-address=no

# no-auto-default file "/var/lib/NetworkManager/no-auto-default.state"

# WARNING: unknown key 'wifi-wext-only' in section [main] of file 
'/etc/NetworkManager/NetworkManager.conf'
ansible at hn-macbookpro-440:~$


My first question is about warning on wifi-wext-only ??. This keys is 
defined into man, why this warning ?

My second question is more boring....

ansible at hn-macbookpro-440:~$ time sudo NetworkManager --no-daemon
Segmentation fault

real    0m0.059s
user    0m0.010s
sys     0m0.008s



Best regards.
-- 
   -- Jean-Marc LACROIX  () --
     -- mailto : jeanmarc.lacroix at free.fr   --