Commit 05050a2b authored by Anjaneyulu's avatar Anjaneyulu Committed by Johannes Berg
Browse files

wifi: mac80211: add consistency check for compat chandef 



Add NULL check for compat variable to avoid crash in
cfg80211_chandef_compatible() if it got called with
some mixed up channel context where not all the users
compatible with each other, which shouldn't happen.

Signed-off-by: default avatarAnjaneyulu <pagadala.yesu.anjaneyulu@intel.com>
Signed-off-by: default avatarGregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230616094948.ae0f10dfd36b.Iea98c74aeb87bf6ef49f6d0c8687bba0dbea2abd@changeid


Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 276311d5

net/mac80211/chan.c

+5 −0
Original line number Diff line number Diff line
@@ -802,6 +802,11 @@ void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local, 
		}

	}



	if (WARN_ON_ONCE(!compat)) {

		rcu_read_unlock();

		return;

	}



	/* TDLS peers can sometimes affect the chandef width */

	list_for_each_entry_rcu(sta, &local->sta_list, list) {

		if (!sta->uploaded ||