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Subject[PATCH 4.14 255/496] iwlwifi: mvm: Correctly set IGTK for AP
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Beni Lev <beni.lev@intel.com>

[ Upstream commit e829b17caf96c2da34620e335fb777592990906c ]

Currently when an IGTK is set for an AP, it is set as a regular key.
Since the cipher is set to CMAC, the STA_KEY_FLG_EXT flag is added to
the host command, which causes assert 0x253D on NICs that do not support
this.

Fixes: 85aeb58cec1a ("iwlwifi: mvm: Enable security on new TX API")
Signed-off-by: Beni Lev <beni.lev@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)

--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -3182,17 +3182,9 @@ int iwl_mvm_set_sta_key(struct iwl_mvm *
}
sta_id = mvm_sta->sta_id;

- if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
- keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
- keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
- ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id,
- false);
- goto end;
- }
-
/*
* It is possible that the 'sta' parameter is NULL, and thus
- * there is a need to retrieve the sta from the local station
+ * there is a need to retrieve the sta from the local station
* table.
*/
if (!sta) {
@@ -3207,6 +3199,17 @@ int iwl_mvm_set_sta_key(struct iwl_mvm *

if (WARN_ON_ONCE(iwl_mvm_sta_from_mac80211(sta)->vif != vif))
return -EINVAL;
+ } else {
+ struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+
+ sta_id = mvmvif->mcast_sta.sta_id;
+ }
+
+ if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
+ keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
+ keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) {
+ ret = iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, false);
+ goto end;
}

/* If the key_offset is not pre-assigned, we need to find a

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