From: Liad Kaufman Date: Thu, 22 Sep 2016 12:14:08 +0000 (+0300) Subject: iwlwifi: mvm: fix reserved txq freeing X-Git-Tag: v4.10-rc1~202^2~118^2~105^2~8 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=56214749e0b46eeac6795551f187c0f9443918f2;p=platform%2Fkernel%2Flinux-exynos.git iwlwifi: mvm: fix reserved txq freeing If a TXQ's marking as a reserved queue is removed, when removing the STA the driver might try to access out of bounds memory. Make sure the reserved queue is freed only if it is still reserved. Signed-off-by: Liad Kaufman Signed-off-by: Luca Coelho --- diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c index a65030f..c9dcb70 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c @@ -1494,12 +1494,15 @@ int iwl_mvm_rm_sta(struct iwl_mvm *mvm, ret = iwl_mvm_drain_sta(mvm, mvm_sta, false); /* If DQA is supported - the queues can be disabled now */ - if (iwl_mvm_is_dqa_supported(mvm)) { + if (iwl_mvm_is_dqa_supported(mvm)) + iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta); + + /* If there is a TXQ still marked as reserved - free it */ + if (iwl_mvm_is_dqa_supported(mvm) && + mvm_sta->reserved_queue != IEEE80211_INVAL_HW_QUEUE) { u8 reserved_txq = mvm_sta->reserved_queue; enum iwl_mvm_queue_status *status; - iwl_mvm_disable_sta_queues(mvm, vif, mvm_sta); - /* * If no traffic has gone through the reserved TXQ - it * is still marked as IWL_MVM_QUEUE_RESERVED, and