From: Anjaneyulu <pagadala.yesu.anjaneyulu@xxxxxxxxx>
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: Anjaneyulu <pagadala.yesu.anjaneyulu@xxxxxxxxx>
Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx>
---
net/mac80211/chan.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index 168bf3edd4b4..68952752b599 100644
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -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 ||
--
2.38.1
