wifi: mac80211: unlist vifs when their netdev is unregistered

mac80211 only removes vifs from the local->interfaces list when
an interface is removed via ieee80211_if_remove(), before it
unregisters the netdev. However, it's possible for a netdev to
be unregistered without going through that: When the netns that
holds the wiphy is destroyed, the wiphy is supposed to move to
the init_ns, but that can run into allocation failures.

Then, mac80211 has an interface listed that doesn't exist, and
will eventually hit

  BUG: failure at net/wireless/core.h:141/wiphy_to_rdev()!
  ...
  _cfg80211_unregister_wdev+0x24/0x36a [cfg80211]
  cfg80211_unregister_wdev+0x15/0x1d [cfg80211]
  ieee80211_remove_interfaces+0x1ff/0x257 [mac80211]
  ieee80211_unregister_hw+0x73/0x1d1 [mac80211]
  mac80211_hwsim_del_radio+0x114/0x166 [mac80211_hwsim]

Remove the interface from the list in ->ndo_uninit if it's still
around to avoid this.

Assisted-by: LLM
Fixes: 463d018323851 ("cfg80211: make aware of net namespaces")
Link: https://patch.msgid.link/20260904170220.038ad73e6c04.I990abca78483e058746b6f42b4796717c3028164@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

0 files changed, 0 insertions, 0 deletions