Commit 0ee4d555 authored by Johannes Berg's avatar Johannes Berg
Browse files

mac80211: remove warning in ieee80211_get_sband() 



Syzbot reports that it's possible to hit this from userspace,
by trying to add a station before any other connection setup
has been done. Instead of trying to catch this in some other
way simply remove the warning, that will appropriately reject
the call from userspace.

Reported-by: default avatar <syzbot+7716dbc401d9a437890d@syzkaller.appspotmail.com>
Link: https://lore.kernel.org/r/20210517164715.f537da276d17.Id05f40ec8761d6a8cc2df87f1aa09c651988a586@changeid


Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 593f555f

net/mac80211/ieee80211_i.h

+1 −1
Original line number Diff line number Diff line
@@ -1442,7 +1442,7 @@ ieee80211_get_sband(struct ieee80211_sub_if_data *sdata) 
	rcu_read_lock();

	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);



	if (WARN_ON_ONCE(!chanctx_conf)) {

	if (!chanctx_conf) {

		rcu_read_unlock();

		return NULL;

	}