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mac80211: properly drop the connection in case of invalid CSA IE 

In case the frequency is invalid, ieee80211_parse_ch_switch_ie
will fail and we may not even reach the check in
ieee80211_sta_process_chanswitch. Drop the connection
in case ieee80211_parse_ch_switch_ie failed, but still
take into account the CSA mode to remember not to send
a deauth frame in case if it is forbidden to.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210409123755.34712ef96a0a.I75d7ad7f1d654e8b0aa01cd7189ff00a510512b3@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Emmanuel Grumbach 2021-04-09 12:40:16 +03:00 committed by Johannes Berg
parent f30386a85f
commit 253907ab8b
1 changed files with 2 additions and 5 deletions
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7
net/mac80211/mlme.c
View File

@ -1405,11 +1405,8 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
ch_switch.delay = csa_ie.max_switch_time;
}
if (res < 0) {
ieee80211_queue_work(&local->hw,
&ifmgd->csa_connection_drop_work);
return;
}
if (res < 0)
goto lock_and_drop_connection;
if (beacon && sdata->vif.csa_active && !ifmgd->csa_waiting_bcn) {
if (res)