Debian Bug report logs - #836351
new mac address randomization breaks WiFi with various drivers

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Joey Hess <id@joeyh.name>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: new mac address randomization breaks r8723au

Date: Thu, 1 Sep 2016 22:33:49 -0400

[Message part 1 (text/plain, inline)]

Package: network-manager
Version: 1.4.0-3
Severity: normal

My Lenovo Yoga laptop uses the r8723au kernel driver. This driver is low
quality, and one of its bugs is that when asked to change the mac
address, the system call succeeds, but the address is not actually
changed (see #774898):

root@darkstar:~>macchanger -r wlan0 
Current MAC:   <omitted> (Liteon Technology Corporation)
Permanent MAC: <same^^^> (Liteon Technology Corporation)
New MAC:       2e:ba:07:b6:bd:3e (unknown)
Network driver didn't actually change to the new MAC!!

Apparently this behavior causes a bad interaction with network-manager's new
mac address randomization.

When wifi.scan-rand-mac-address=yes, network-manager fails to scan for wifi
networks. The UI has no indication of a problem, other than no networks are
listed. The log shows:

Sep 01 22:16:03 darkstar kernel: IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Sep 01 22:16:03 darkstar wpa_supplicant[5360]: wlan0: CTRL-EVENT-REGDOM-CHANGE init=CORE type=WORLD
Sep 01 22:16:03 darkstar NetworkManager[9700]: <info>  [1472782563.1695] device (wlan0): supplicant interface state: disabled -> disconnected
Sep 01 22:16:04 darkstar NetworkManager[9700]: <info>  [1472782564.4725] device (wlan0): supplicant interface state: disconnected -> inactive
Sep 01 22:16:04 darkstar NetworkManager[9700]: <warn>  [1472782564.4767] device (wlan0): set-hw-addr: new MAC address 56:61:92:36:E5:54 not successfully set to set (scanning)
Sep 01 22:16:04 darkstar kernel: IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Sep 01 22:16:04 darkstar wpa_supplicant[5360]: wlan0: CTRL-EVENT-REGDOM-CHANGE init=CORE type=WORLD

When wifi.scan-rand-mac-address=no, and wifi.cloned-mac-address=random, it
finds networks, but fails to connect, displaying a dialog box with a error
message that threatens to summon the dark elder gods of bad error messages:

	           Failed to add/activate connection
	(2) Active connection removed before it was initialized

Log:

Sep 01 22:17:50 darkstar NetworkManager[10288]: <info>  [1472782670.0328] manager: NetworkManager state is now CONNECTING
Sep 01 22:17:50 darkstar NetworkManager[10288]: <warn>  [1472782670.0338] device (wlan0): set-hw-addr: new MAC address E2:14:61:DC:AA:08 not successfully set to set-cloned (random)
Sep 01 22:17:50 darkstar NetworkManager[10288]: <info>  [1472782670.0340] device (wlan0): state change: prepare -> failed (reason 'none') [40 120 0]
Sep 01 22:17:50 darkstar NetworkManager[10288]: <info>  [1472782670.0343] manager: NetworkManager state is now DISCONNECTED

Hopefully the r8723au staging driver is going away soon and the new
driver will be better. But, it seems network-manager could better deal with
a failure to randomize the MAC, in its behavior and/or UI.

Note that, since known network connections made before upgrading have
randomization disabled, this bug will mostly affect connecting to new
networks some time after upgrading. I think that my earlier bug #818428
was due to experiencing that while traveling, after the scanning MAC
randomization was first added to network-manager.

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.7.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages network-manager depends on:
ii  adduser                3.115
ii  dbus                   1.10.10-1
ii  init-system-helpers    1.42
ii  libaudit1              1:2.6.6-1
ii  libbluetooth3          5.36-1+b2
ii  libc6                  2.23-5
ii  libglib2.0-0           2.49.6-1
ii  libgnutls30            3.5.3-3
ii  libgudev-1.0-0         230-3
ii  libmm-glib0            1.6.0-1
ii  libndp0                1.6-1
ii  libnewt0.52            0.52.18-3
ii  libnl-3-200            3.2.27-1
ii  libnm0                 1.4.0-3
ii  libpam-systemd         231-5
ii  libpolkit-agent-1-0    0.105-16
ii  libpolkit-gobject-1-0  0.105-16
ii  libreadline6           6.3-8+b4
ii  libselinux1            2.5-3
ii  libsoup2.4-1           2.54.1-1
ii  libsystemd0            231-5
ii  libteamdctl0           1.26-1
ii  libuuid1               2.28.1-1
ii  lsb-base               9.20160629
ii  policykit-1            0.105-16
ii  udev                   231-5
ii  wpasupplicant          2.5-2+v2.4-2

Versions of packages network-manager recommends:
ii  crda             3.13-1+b1
pn  dnsmasq-base     <none>
ii  iptables         1.6.0-3
pn  iputils-arping   <none>
ii  isc-dhcp-client  4.3.4-1
pn  modemmanager     <none>
ii  ppp              2.4.7-1+3

Versions of packages network-manager suggests:
pn  libteam-utils  <none>

-- 
see shy jo

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Message #20 received at 835822-close@bugs.debian.org (full text, mbox, reply):

From: Michael Biebl <biebl@debian.org>

To: 835822-close@bugs.debian.org

Subject: Bug#835822: fixed in network-manager 1.4.0-4

Date: Fri, 23 Sep 2016 22:27:32 +0000

Source: network-manager
Source-Version: 1.4.0-4

We believe that the bug you reported is fixed in the latest version of
network-manager, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 835822@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Michael Biebl <biebl@debian.org> (supplier of updated network-manager package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Format: 1.8
Date: Fri, 23 Sep 2016 23:53:33 +0200
Source: network-manager
Binary: network-manager network-manager-dev libnm-glib4 libnm-glib-dev libnm-glib-vpn1 libnm-glib-vpn-dev libnm-util2 libnm-util-dev libnm0 libnm-dev gir1.2-networkmanager-1.0
Architecture: source
Version: 1.4.0-4
Distribution: unstable
Urgency: medium
Maintainer: Utopia Maintenance Team <pkg-utopia-maintainers@lists.alioth.debian.org>
Changed-By: Michael Biebl <biebl@debian.org>
Description:
 gir1.2-networkmanager-1.0 - GObject introspection data for NetworkManager
 libnm-dev  - GObject-based client library for NetworkManager (development file
 libnm-glib-dev - network management framework (GLib interface)
 libnm-glib-vpn-dev - network management framework (GLib interface)
 libnm-glib-vpn1 - network management framework (GLib VPN shared library)
 libnm-glib4 - network management framework (GLib shared library)
 libnm-util-dev - network management framework (development files)
 libnm-util2 - network management framework (shared library)
 libnm0     - GObject-based client library for NetworkManager
 network-manager - network management framework (daemon and userspace tools)
 network-manager-dev - network management framework (development files)
Closes: 835553 835822 838594
Changes:
 network-manager (1.4.0-4) unstable; urgency=medium
 .
   * Drop override for dh_auto_test. We don't explicitly need to dump the log
     files as dh_auto_test runs with VERBOSE=1 by default.
   * Fix MAC address randomization.
     Cherry-pick a couple of upstream commits which work around driver bugs
     when MAC address randomization is used. (Closes: #835822, #835553)
   * Bump debhelper compat level to 10.
   * Don't try to decrypt PKCS#8 key if no password is supplied. This fixes
     failures with GnuTLS 3.5.4 which supports PBES1-DES-CBC-MD5 now.
     (Closes: #838594)
Checksums-Sha1:
 06a00400512022be1c272f7fb1cacb6a8c6208bd 3553 network-manager_1.4.0-4.dsc
 a38c402a0aa32d9065aab05d4ca00394b7e4492f 50548 network-manager_1.4.0-4.debian.tar.xz
Checksums-Sha256:
 b6de2f9682a22f8d7e62ca5c4b56e2427eebcaa72ecb1c93154d9f5c8f18d937 3553 network-manager_1.4.0-4.dsc
 549f45cb9e8be14c5d0fa6811362956f0dbd85637f21339cf5c7fe73d36485d4 50548 network-manager_1.4.0-4.debian.tar.xz
Files:
 e91d8b889376a0b1d917a0fba96c8491 3553 net optional network-manager_1.4.0-4.dsc
 c3337734037d9b0b696e13150966e0b6 50548 net optional network-manager_1.4.0-4.debian.tar.xz

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