[Bug 1867908] Re: Fix RTM NEW/DELLINK IFLA_IFNAME copy for maximum ifname length

[Launchpad Bug Tracker]

This bug was fixed in the package wpa - 2:2.9-1ubuntu4

---------------
wpa (2:2.9-1ubuntu4) focal; urgency=medium

  * debian/patches/git_realtek_macrand.patch:
    - backport an upstream patch to fix issues with some realtek cards
      when MAC address randomization is enabled (lp: #1867908)

 -- Sebastien Bacher <seb128 at ubuntu.com>  Wed, 15 Apr 2020 10:08:07
+0200

** Changed in: wpa (Ubuntu Focal)
       Status: Fix Committed => Fix Released

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Title:
  Fix RTM NEW/DELLINK IFLA_IFNAME copy for maximum ifname length

Status in wpa package in Ubuntu:
  Fix Released
Status in wpa source package in Focal:
  Fix Released

Bug description:
  Some wifi adapters kept asking for a password when MAC address
  randomization was enabled.

  I reported this to Realtek, and they gave me a patch for
  wpa_supplicant, which fixes the issue.

  I asked Realtek to report this upstream to wpasupplicant, and they
  did, the commit is:
  http://w1.fi/cgit/hostap/commit/?id=7546c489a95a033c78331915fcdfa0e6fd74d563

  It would be very nice to cherrypick that for Focal.

  I uploaded it as a merge request below, and I tested that it fixes the issue with adapters based on the following chipsets:
  ath9k, rtl8812au, rtl88x2bu and rtl8821cu

  To reproduce this:

  Ubuntu's network-manager defaults to "MAC randomization disabled", I think as a workaround to this specific issue. This is defined in two places:
  - wifi.scan-rand-mac-address=no in /etc/NetworkManager/NetworkManager.conf
  - Some specific drivers in /usr/lib/NetworkManager/conf.d/no-mac-addr-change.conf.

  With these, the problem happens in around 10% of the cases.
  To be able to reproduce it in 100% of the cases, it's best to remove these Ubuntu workarounds. So:
  - Set "wifi.scan-rand-mac-address=yes" in /etc/NetworkManager/NetworkManager.conf
  - Remove /usr/lib/NetworkManager/conf.d/no-mac-addr-change.conf.
  - systemctl stop network-manager
  - killall wpa_supplicant
  - systemctl start network-manager

  Then insert a USB wifi adapter that results in a big name with 15
  characters like wlx74ee2ae2436a and try to connect to a wifi network.
  It will keep asking for a password.

  Then apply the patch, run the 3 commands above to restart network-
  manager, and verify that it can now connect properly.

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