Return-path: Received: from wolverine02.qualcomm.com ([199.106.114.251]:41552 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753855Ab2ATPz1 (ORCPT ); Fri, 20 Jan 2012 10:55:27 -0500 From: Vasanthakumar Thiagarajan To: CC: , Subject: [PATCH 5/6] ath6kl: Fix bug in using tid given by addba/delba req events Date: Fri, 20 Jan 2012 21:22:01 +0530 Message-ID: <1327074722-3492-5-git-send-email-vthiagar@qca.qualcomm.com> (sfid-20120120_165531_432428_3609DFEB) In-Reply-To: <1327074722-3492-1-git-send-email-vthiagar@qca.qualcomm.com> References: <1327074722-3492-1-git-send-email-vthiagar@qca.qualcomm.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-wireless-owner@vger.kernel.org List-ID: The tid which is given in addba/delba req event is not just tid but also muxed with the assoc id (MSB 4 bits) which can be used to determine the corresponding connected station in softap mode. The actual tid is LSB 4 bits. Using the tid as it is with rx_tid[] would result in OOB or invalid memory access in AP mode. Signed-off-by: Vasanthakumar Thiagarajan --- drivers/net/wireless/ath/ath6kl/txrx.c | 25 +++++++++++++++++++++++-- 1 files changed, 23 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath6kl/txrx.c b/drivers/net/wireless/ath/ath6kl/txrx.c index 35ddae3..eeb3a10 100644 --- a/drivers/net/wireless/ath/ath6kl/txrx.c +++ b/drivers/net/wireless/ath/ath6kl/txrx.c @@ -17,6 +17,17 @@ #include "core.h" #include "debug.h" +/* + * tid - tid_mux0..tid_mux3 + * aid - tid_mux4..tid_mux7 + */ +#define ATH6KL_TID_MASK 0xf + +static inline u8 ath6kl_get_tid(u8 tid_mux) +{ + return tid_mux & ATH6KL_TID_MASK; +} + static u8 ath6kl_ibss_map_epid(struct sk_buff *skb, struct net_device *dev, u32 *map_no) { @@ -1602,7 +1613,7 @@ static void aggr_delete_tid_state(struct aggr_info_conn *aggr_conn, u8 tid) memset(stats, 0, sizeof(struct rxtid_stats)); } -void aggr_recv_addba_req_evt(struct ath6kl_vif *vif, u8 tid, u16 seq_no, +void aggr_recv_addba_req_evt(struct ath6kl_vif *vif, u8 tid_mux, u16 seq_no, u8 win_sz) { struct aggr_info *p_aggr = vif->aggr_cntxt; @@ -1610,12 +1621,17 @@ void aggr_recv_addba_req_evt(struct ath6kl_vif *vif, u8 tid, u16 seq_no, struct rxtid *rxtid; struct rxtid_stats *stats; u16 hold_q_size; + u8 tid; if (!p_aggr || !p_aggr->aggr_conn) return; aggr_conn = p_aggr->aggr_conn; + tid = ath6kl_get_tid(tid_mux); + if (tid >= NUM_OF_TIDS) + return; + rxtid = &aggr_conn->rx_tid[tid]; stats = &aggr_conn->stat[tid]; @@ -1691,15 +1707,20 @@ struct aggr_info *aggr_init(struct ath6kl_vif *vif) return p_aggr; } -void aggr_recv_delba_req_evt(struct ath6kl_vif *vif, u8 tid) +void aggr_recv_delba_req_evt(struct ath6kl_vif *vif, u8 tid_mux) { struct aggr_info *p_aggr = vif->aggr_cntxt; struct rxtid *rxtid; struct aggr_info_conn *aggr_conn; + u8 tid; if (!p_aggr || !p_aggr->aggr_conn) return; + tid = ath6kl_get_tid(tid_mux); + if (tid >= NUM_OF_TIDS) + return; + aggr_conn = p_aggr->aggr_conn; rxtid = &aggr_conn->rx_tid[tid]; -- 1.7.0.4