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wifi: mac80211: add consistency check for compat chandef

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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@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230616094948.ae0f10dfd36b.Iea98c74aeb87bf6ef49f6d0c8687bba0dbea2abd@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Anjaneyulu 2023-06-16 09:53:56 +03:00 committed by Johannes Berg
parent 276311d581
commit 05050a2bc0
1 changed files with 5 additions and 0 deletions
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5
net/mac80211/chan.c
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@ -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 */ /* TDLS peers can sometimes affect the chandef width */
list_for_each_entry_rcu(sta, &local->sta_list, list) { list_for_each_entry_rcu(sta, &local->sta_list, list) {
if (!sta->uploaded || if (!sta->uploaded ||