From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Eyal Shapira , Emmanuel Grumbach Subject: [PATCH 3.10 07/53] iwlwifi: mvm: validate tid and sta_id in ba_notif Date: Tue, 3 Mar 2015 22:06:10 -0800 Message-Id: <20150304054611.206856790@linuxfoundation.org> In-Reply-To: <20150304054609.869052846@linuxfoundation.org> References: <20150304054609.869052846@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eyal Shapira commit 2cee4762c528a9bd2cdff793197bf591a2196c11 upstream. 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. Signed-off-by: Eyal Shapira Signed-off-by: Emmanuel Grumbach Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/iwlwifi/mvm/tx.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/net/wireless/iwlwifi/mvm/tx.c +++ b/drivers/net/wireless/iwlwifi/mvm/tx.c @@ -832,6 +832,11 @@ int iwl_mvm_rx_ba_notif(struct iwl_mvm * 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]);