mac80211_hwsim: hostapd fails to start with S1G band

[Paolo Pisati]

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.

[Sebastien Bacher (seb128)]

Thanks for the patch Paolo, I uploaded to hirsute now

[Launchpad Janitor (janitor)]

This bug was fixed in the package wpa - 2:2.9-1ubuntu10

---------------
wpa (2:2.9-1ubuntu10) hirsute; urgency=medium

  * debian/patches/git_dbus_bridge.patch
    - Allow changing an interface bridge via D-Bus (lp: #1893563)

  [ Andrej Shadura ]
  * Security fix: CVE-2020-12695.
    A vulnerability in the UPnP SUBSCRIBE command can trigger the AP to
    initiate a HTTP (TCP/IP) connection to an arbitrary URL or to trigger
    misbehavior in hostapd and cause the process to either get terminated
    or to start using more CPU resources.
    The issue can also be mitigated by building hostapd without UPnP support
    (CONFIG_WPS_UPNP=n) or disabling it at runtime by removing the upnp_iface
    parameter.
    (Closes: #976106)

  [ Paolo Pisati ]
  * debian/patches/nl80211-Unbreak-mode-processing-due-to-presence-of-S.patch:
    - backport upstream fix (commit 52a1b28345123c374fd0127cbce623c41a760730)
      for S1G band (lp: #1912609)

 -- Sebastien Bacher <email address hidden> Thu, 28 Jan 2021 15:10:07 +0100