In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211: don't warn when an IBSS has no channel to scan

ieee80211_request_ibss_scan() warns when regulatory leaves no
allowed channel, but that can happen as the regdomain can change
while IBSS is operating, and it can continue to operate briefly
during the 60s grace period until it's shut down.

Just remove the warning in this case.