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Bug#499868: marked as done (udev: multiple mac80211 interfaces created on the same physical device are incorrectly renamed)



Your message dated Mon, 29 Sep 2025 18:19:22 +0200
with message-id <799561cf0fcd265b07f9def0c8c0fd9ae918c75e.camel@decadent.org.uk>
and subject line Re: udev: multiple mac80211 interfaces created on the same physical device are incorrectly renamed
has caused the Debian Bug report #499868,
regarding udev: multiple mac80211 interfaces created on the same physical device are incorrectly renamed
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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-- 
499868: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=499868
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
Package: udev
Version: 0.125-6
Severity: normal

mac80211 drivers allow multiple interfaces to be created on the same physical
device, so the underlying wmaster0 device can have eth0, eth1 and eth2.  When
the driver is first loaded, a udev rule like this is written:

# PCI device 0x14e4:0x4318 (b43)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="xx:xx:xx:xx:xx:xx", ATTR{type}=="1", KERNEL=="wlan*", NAME="eth0"

(originally 'NAME="wlan0"', I changed it to eth0)

When I subsequently add an interface with

iw dev wmaster0 interface add eth1 type station

a udev rule like this is added:

# PCI device 0x14e4:0x4318 (b43)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="xx:xx:xx:xx:xx:xx", ATTR{type}=="1", KERNEL=="eth**", NAME="eth1"

Then, if I add another interface with

iw dev wmaster0 interface add eth2 type station

it gets caught by the existing rule and I get the infamous 'eth2_rename'
instead of 'eth2'.

I have seen this behavior with both b43 and ath5k.  Perhaps creating multiple
ethX interfaces is a corner case, but the documentation should at least warn
about it.



-- Package-specific info:
-- /etc/udev/rules.d/:
/etc/udev/rules.d/:
total 133
-rw-r--r-- 1 root root  1547 2008-07-16 18:38 024_hpmud.rules
lrwxrwxrwx 1 root root    19 2007-04-19 15:03 025_libgphoto2.rules -> ../libgphoto2.rules
-rw-r--r-- 1 root root   115 2008-07-16 18:38 45-hplip.rules
-rw-r--r-- 1 root root   210 2007-11-22 03:03 45-hplip.rules.dpkg-old
-rw-r--r-- 1 root root  3586 2008-08-06 19:48 50-udev.rules
-rw-r--r-- 1 root root   115 2008-07-16 18:38 55-hpmud.rules
-rw-r--r-- 1 root root  1543 2008-07-07 07:04 60-persistent-input.rules
-rw-r--r-- 1 root root  4554 2008-08-04 06:33 60-persistent-storage.rules
-rw-r--r-- 1 root root  1582 2008-07-11 09:40 60-persistent-storage-tape.rules
-rw-r--r-- 1 root root   523 2008-07-07 07:04 60-persistent-v4l.rules
-rw-r--r-- 1 root root  1083 2008-07-17 05:53 65_dmsetup.rules
-rw-r--r-- 1 root root   603 2007-02-04 12:37 70-persistent-cd.rules
-rw-r--r-- 1 root root   884 2008-09-23 01:26 70-persistent-net.rules
-rw-r--r-- 1 root root   452 2008-07-07 07:04 75-cd-aliases-generator.rules
-rw-r--r-- 1 root root  3081 2008-09-23 01:16 75-persistent-net-generator.rules
-rw-r--r-- 1 root root  2282 2008-07-20 13:08 80-drivers.rules
lrwxrwxrwx 1 root root    15 2007-02-04 12:42 85-pcmcia.rules -> ../pcmcia.rules
-rw-r--r-- 1 root root    82 2008-08-17 14:15 90-hal.rules
-rw-r--r-- 1 root root  4247 2008-07-20 13:08 91-permissions.rules
-rw-r--r-- 1 root root   593 2008-07-29 19:07 95-late.rules
-rwxr-xr-x 1 root root   221 2008-09-19 15:50 regulatory.rules
lrwxrwxrwx 1 root root    19 2007-02-09 13:59 z60_alsa-utils.rules -> ../alsa-utils.rules
lrwxrwxrwx 1 root root    15 2007-02-04 12:54 z60_hdparm.rules -> ../hdparm.rules
-rw-r--r-- 1 root root  1914 2008-02-08 10:08 z60_libccid.rules
-rw-r--r-- 1 root root  2656 2008-01-03 03:15 z60_libpisock9.rules
-rw-r--r-- 1 root root 14883 2008-03-01 10:19 z60_libsane-extras.rules
-rw-r--r-- 1 root root 72908 2008-09-10 10:49 z60_libsane.rules

-- /sys/:
/sys/block/hda/dev
/sys/block/hda/hda1/dev
/sys/block/hda/hda2/dev
/sys/block/hda/hda3/dev
/sys/block/hda/hda4/dev
/sys/block/hda/hda5/dev
/sys/block/hda/hda6/dev
/sys/block/hda/hda7/dev
/sys/block/hda/hda8/dev
/sys/block/hda/hda9/dev
/sys/block/hdb/dev
/sys/block/loop0/dev
/sys/block/loop1/dev
/sys/block/loop2/dev
/sys/block/loop3/dev
/sys/block/loop4/dev
/sys/block/loop5/dev
/sys/block/loop6/dev
/sys/block/loop7/dev
/sys/block/ram0/dev
/sys/block/ram10/dev
/sys/block/ram11/dev
/sys/block/ram12/dev
/sys/block/ram13/dev
/sys/block/ram14/dev
/sys/block/ram15/dev
/sys/block/ram1/dev
/sys/block/ram2/dev
/sys/block/ram3/dev
/sys/block/ram4/dev
/sys/block/ram5/dev
/sys/block/ram6/dev
/sys/block/ram7/dev
/sys/block/ram8/dev
/sys/block/ram9/dev
/sys/class/drm/card0/dev
/sys/class/input/input0/event0/dev
/sys/class/input/input13/event10/dev
/sys/class/input/input1/event1/dev
/sys/class/input/input2/event2/dev
/sys/class/input/input3/event3/dev
/sys/class/input/input4/event4/dev
/sys/class/input/input5/event5/dev
/sys/class/input/input5/mouse0/dev
/sys/class/input/input6/event6/dev
/sys/class/input/input7/event7/dev
/sys/class/input/input8/event8/dev
/sys/class/input/input9/event9/dev
/sys/class/input/input9/mouse1/dev
/sys/class/input/mice/dev
/sys/class/misc/agpgart/dev
/sys/class/misc/cpu_dma_latency/dev
/sys/class/misc/device-mapper/dev
/sys/class/misc/hpet/dev
/sys/class/misc/hw_random/dev
/sys/class/misc/network_latency/dev
/sys/class/misc/network_throughput/dev
/sys/class/misc/psaux/dev
/sys/class/misc/snapshot/dev
/sys/class/rtc/rtc0/dev
/sys/class/sound/audio/dev
/sys/class/sound/controlC0/dev
/sys/class/sound/dsp/dev
/sys/class/sound/mixer/dev
/sys/class/sound/pcmC0D0c/dev
/sys/class/sound/pcmC0D0p/dev
/sys/class/sound/pcmC0D4c/dev
/sys/class/sound/seq/dev
/sys/class/sound/sequencer2/dev
/sys/class/sound/sequencer/dev
/sys/class/sound/timer/dev
/sys/class/usb_endpoint/usbdev1.1_ep00/dev
/sys/class/usb_endpoint/usbdev1.1_ep81/dev
/sys/class/usb_endpoint/usbdev2.1_ep00/dev
/sys/class/usb_endpoint/usbdev2.1_ep81/dev
/sys/class/usb_endpoint/usbdev2.3_ep00/dev
/sys/class/usb_endpoint/usbdev2.3_ep81/dev
/sys/class/usb_endpoint/usbdev2.4_ep00/dev
/sys/class/usb_endpoint/usbdev2.4_ep81/dev
/sys/class/usb_endpoint/usbdev2.4_ep82/dev
/sys/class/usb_endpoint/usbdev3.1_ep00/dev
/sys/class/usb_endpoint/usbdev3.1_ep81/dev
/sys/class/usb_endpoint/usbdev3.2_ep00/dev
/sys/class/usb_endpoint/usbdev3.2_ep81/dev
/sys/class/usb_endpoint/usbdev4.1_ep00/dev
/sys/class/usb_endpoint/usbdev4.1_ep81/dev
/sys/class/usb_endpoint/usbdev5.1_ep00/dev
/sys/class/usb_endpoint/usbdev5.1_ep81/dev
/sys/dev
/sys/devices/pci0000:00/0000:00:1d.0/usb1/dev
/sys/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1.1/dev
/sys/devices/pci0000:00/0000:00:1d.1/usb2/2-1/dev
/sys/devices/pci0000:00/0000:00:1d.1/usb2/dev
/sys/devices/pci0000:00/0000:00:1d.2/usb3/3-1/dev
/sys/devices/pci0000:00/0000:00:1d.2/usb3/dev
/sys/devices/pci0000:00/0000:00:1d.3/usb4/dev
/sys/devices/pci0000:00/0000:00:1d.7/usb5/dev

-- Kernel configuration:
 isapnp_init not present.


-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.27-rc6-wl-lizzie
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages udev depends on:
ii  debconf [debconf-2.0]         1.5.23     Debian configuration management sy
ii  libc6                         2.7-13     GNU C Library: Shared libraries
ii  libselinux1                   2.0.65-5   SELinux shared libraries
ii  libvolume-id0                 0.125-6    libvolume_id shared library
ii  lsb-base                      3.2-20     Linux Standard Base 3.2 init scrip

udev recommends no packages.

udev suggests no packages.

-- debconf information:
  udev/new_kernel_needed: false
  udev/reboot_needed:



--- End Message ---
--- Begin Message ---
Version: 4.7-0.1

It looks like this was fixed in upstream version 4.0 by:

commit ced5522d199b7b1b5b10cf94b276b74314ca8da3
Author: Ben Greear <greearb@candelatech.com>
Date:   Fri Oct 24 08:35:42 2014 -0700
 
    iw: support setting vif MAC during creation
    
    This saves an extra call to change it later, and will
    also keep udev from potentially messing with a vif
    it should not be messing with.

Ben.

-- 
Ben Hutchings
Horngren's Observation:
              Among economists, the real world is often a special case.

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