** Changed in: wpa (Ubuntu Hirsute)
   Importance: Undecided => High

** Changed in: wpa (Ubuntu Hirsute)
       Status: New => Fix Committed

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https://bugs.launchpad.net/bugs/1912609

Title:
  mac80211_hwsim: hostapd fails to start with S1G band

Status in wpa package in Ubuntu:
  Fix Committed
Status in wpa source package in Hirsute:
  Fix Committed

Bug description:
  Hostapd fails to start on a recent 5.10+ kernel:

  $ cat repro.sh 
  #!/bin/sh

  sudo modprobe mac80211_hwsim
  sudo  ip a flush dev wlan0
  sudo  ip a add 192.168.5.1/24 dev wlan0

  cat << EOF > hostapd.conf
  interface=wlan0
  driver=nl80211
  hw_mode=b
  channel=1
  ssid=fake net
  EOF

  sudo  hostapd hostapd.conf

  ubuntu@hirsute-amd64:~$ ./repro.sh 
  Configuration file: hostapd.conf
  nl80211: kernel reports: expected nested data
  Using interface wlan0 with hwaddr 02:00:00:00:00:00 and ssid "fake net"
  wlan0: interface state UNINITIALIZED->ENABLED
  wlan0: AP-ENABLED 
  ^C
  wlan0: interface state ENABLED->DISABLED
  wlan0: AP-DISABLED      
  wlan0: CTRL-EVENT-TERMINATING 
  nl80211: deinit ifname=wlan0 disabled_11b_rates=0

  this due to the mismanagement of the newly added S1G band, the
  attached patch fixes it.

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