From e3df1e4b51e5e54637355db7d732fedf271530e7 Mon Sep 17 00:00:00 2001 From: Sharon Dvir Date: Tue, 21 Feb 2017 10:41:31 +0200 Subject: [PATCH] iwlwifi: mvm: check if returned value is NULL While freeing inactive queue, check mvmsta to be valid before dereferencing it. Found by Klocwork. Signed-off-by: Sharon Dvir Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c index a2a1fa0..fc6d854 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c @@ -495,6 +495,8 @@ static int iwl_mvm_free_inactive_queue(struct iwl_mvm *mvm, int queue, spin_unlock_bh(&mvm->queue_info_lock); mvmsta = iwl_mvm_sta_from_staid_protected(mvm, sta_id); + if (WARN_ON(!mvmsta)) + return -EINVAL; disable_agg_tids = iwl_mvm_remove_sta_queue_marking(mvm, queue); /* Disable the queue */ -- 2.7.4