From 2cee4762c528a9bd2cdff793197bf591a2196c11 Mon Sep 17 00:00:00 2001 From: Eyal Shapira Date: Fri, 16 Jan 2015 11:09:30 +0200 Subject: [PATCH] iwlwifi: mvm: validate tid and sta_id in ba_notif These are coming from the FW and are used to access arrays. Bad values can cause an out of bounds access so discard such ba_notifs and warn. CC: [3.10+] Signed-off-by: Eyal Shapira Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/mvm/tx.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/wireless/iwlwifi/mvm/tx.c b/drivers/net/wireless/iwlwifi/mvm/tx.c index c59d07567d90..650a5f0b94c7 100644 --- a/drivers/net/wireless/iwlwifi/mvm/tx.c +++ b/drivers/net/wireless/iwlwifi/mvm/tx.c @@ -930,6 +930,11 @@ int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, sta_id = ba_notif->sta_id; tid = ba_notif->tid; + if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || + tid >= IWL_MAX_TID_COUNT, + "sta_id %d tid %d", sta_id, tid)) + return 0; + rcu_read_lock(); sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); -- 2.20.1