From 5ab2ba931255d8bf03009c06d58dce97de32797c Mon Sep 17 00:00:00 2001 From: Sara Sharon Date: Tue, 29 Mar 2016 10:56:57 +0300 Subject: [PATCH 1/5] iwlwifi: mvm: fix security bug in PN checking A previous patch allowed the same PN for packets originating from the same AMSDU by copying PN only for the last packet in the series. This however is bogus since we cannot assume the last frame will be received on the same queue, and if it is received on a different ueue we will end up not incrementing the PN and possibly let the next packet to have the same PN and pass through. Change the logic instead to driver explicitly indicate for the second sub frame and on to be allowed to have the same PN as the first subframe. Indicate it to mac80211 as well for the fallback queue. Fixes: f1ae02b186d9 ("iwlwifi: mvm: allow same PN for de-aggregated AMSDU") Signed-off-by: Sara Sharon Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c | 39 ++++++++++--------- 1 file changed, 20 insertions(+), 19 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c index a3f7c1bf3cc8..580de5851fc7 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c @@ -71,6 +71,7 @@ static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb, struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct ieee80211_rx_status *stats = IEEE80211_SKB_RXCB(skb); struct iwl_mvm_key_pn *ptk_pn; + int res; u8 tid, keyidx; u8 pn[IEEE80211_CCMP_PN_LEN]; u8 *extiv; @@ -127,12 +128,13 @@ static inline int iwl_mvm_check_pn(struct iwl_mvm *mvm, struct sk_buff *skb, pn[4] = extiv[1]; pn[5] = extiv[0]; - if (memcmp(pn, ptk_pn->q[queue].pn[tid], - IEEE80211_CCMP_PN_LEN) <= 0) + res = memcmp(pn, ptk_pn->q[queue].pn[tid], IEEE80211_CCMP_PN_LEN); + if (res < 0) + return -1; + if (!res && !(stats->flag & RX_FLAG_ALLOW_SAME_PN)) return -1; - if (!(stats->flag & RX_FLAG_AMSDU_MORE)) - memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN); + memcpy(ptk_pn->q[queue].pn[tid], pn, IEEE80211_CCMP_PN_LEN); stats->flag |= RX_FLAG_PN_VALIDATED; return 0; @@ -314,28 +316,21 @@ static void iwl_mvm_rx_csum(struct ieee80211_sta *sta, } /* - * returns true if a packet outside BA session is a duplicate and - * should be dropped + * returns true if a packet is a duplicate and should be dropped. + * Updates AMSDU PN tracking info */ -static bool iwl_mvm_is_nonagg_dup(struct ieee80211_sta *sta, int queue, - struct ieee80211_rx_status *rx_status, - struct ieee80211_hdr *hdr, - struct iwl_rx_mpdu_desc *desc) +static bool iwl_mvm_is_dup(struct ieee80211_sta *sta, int queue, + struct ieee80211_rx_status *rx_status, + struct ieee80211_hdr *hdr, + struct iwl_rx_mpdu_desc *desc) { struct iwl_mvm_sta *mvm_sta; struct iwl_mvm_rxq_dup_data *dup_data; - u8 baid, tid, sub_frame_idx; + u8 tid, sub_frame_idx; if (WARN_ON(IS_ERR_OR_NULL(sta))) return false; - baid = (le32_to_cpu(desc->reorder_data) & - IWL_RX_MPDU_REORDER_BAID_MASK) >> - IWL_RX_MPDU_REORDER_BAID_SHIFT; - - if (baid != IWL_RX_REORDER_DATA_INVALID_BAID) - return false; - mvm_sta = iwl_mvm_sta_from_mac80211(sta); dup_data = &mvm_sta->dup_data[queue]; @@ -365,6 +360,12 @@ static bool iwl_mvm_is_nonagg_dup(struct ieee80211_sta *sta, int queue, dup_data->last_sub_frame[tid] >= sub_frame_idx)) return true; + /* Allow same PN as the first subframe for following sub frames */ + if (dup_data->last_seq[tid] == hdr->seq_ctrl && + sub_frame_idx > dup_data->last_sub_frame[tid] && + desc->mac_flags2 & IWL_RX_MPDU_MFLG2_AMSDU) + rx_status->flag |= RX_FLAG_ALLOW_SAME_PN; + dup_data->last_seq[tid] = hdr->seq_ctrl; dup_data->last_sub_frame[tid] = sub_frame_idx; @@ -971,7 +972,7 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi, if (ieee80211_is_data(hdr->frame_control)) iwl_mvm_rx_csum(sta, skb, desc); - if (iwl_mvm_is_nonagg_dup(sta, queue, rx_status, hdr, desc)) { + if (iwl_mvm_is_dup(sta, queue, rx_status, hdr, desc)) { kfree_skb(skb); goto out; } From fc07bd8ce19bff9e7479c04077ddb5957d1a27be Mon Sep 17 00:00:00 2001 From: Sara Sharon Date: Thu, 21 Dec 2017 15:05:28 +0200 Subject: [PATCH 2/5] iwlwifi: mvm: fix IBSS for devices that support station type API In IBSS, the mac80211 sets the cab_queue to be invalid. However, the multicast station uses it, so we need to override it. A previous patch did it, but it was nested inside the if's and was applied only for legacy FWs that don't support the new station type API, instead of being applied for all paths. In addition, add a missing NL80211_IFTYPE_ADHOC to the initialization of the queues in iwl_mvm_mac_ctxt_init() Fixes: ee48b72211f8 ("iwlwifi: mvm: support ibss in dqa mode") Signed-off-by: Sara Sharon Signed-off-by: Luca Coelho --- .../net/wireless/intel/iwlwifi/mvm/mac-ctxt.c | 3 ++- drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 24 +++++++++---------- 2 files changed, 14 insertions(+), 13 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c index 2f22e14e00fe..8ba16fc24e3a 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c @@ -438,7 +438,8 @@ int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif) } /* Allocate the CAB queue for softAP and GO interfaces */ - if (vif->type == NL80211_IFTYPE_AP) { + if (vif->type == NL80211_IFTYPE_AP || + vif->type == NL80211_IFTYPE_ADHOC) { /* * For TVQM this will be overwritten later with the FW assigned * queue value (when queue is enabled). diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c index 6b2674e02606..dbd2ba2bb714 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c @@ -2052,6 +2052,17 @@ int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) vif->type != NL80211_IFTYPE_ADHOC)) return -ENOTSUPP; + /* + * In IBSS, ieee80211_check_queues() sets the cab_queue to be + * invalid, so make sure we use the queue we want. + * Note that this is done here as we want to avoid making DQA + * changes in mac80211 layer. + */ + if (vif->type == NL80211_IFTYPE_ADHOC) { + vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; + mvmvif->cab_queue = vif->cab_queue; + } + /* * While in previous FWs we had to exclude cab queue from TFD queue * mask, now it is needed as any other queue. @@ -2083,20 +2094,9 @@ int iwl_mvm_add_mcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif) timeout); mvmvif->cab_queue = queue; } else if (!fw_has_api(&mvm->fw->ucode_capa, - IWL_UCODE_TLV_API_STA_TYPE)) { - /* - * In IBSS, ieee80211_check_queues() sets the cab_queue to be - * invalid, so make sure we use the queue we want. - * Note that this is done here as we want to avoid making DQA - * changes in mac80211 layer. - */ - if (vif->type == NL80211_IFTYPE_ADHOC) { - vif->cab_queue = IWL_MVM_DQA_GCAST_QUEUE; - mvmvif->cab_queue = vif->cab_queue; - } + IWL_UCODE_TLV_API_STA_TYPE)) iwl_mvm_enable_txq(mvm, vif->cab_queue, vif->cab_queue, 0, &cfg, timeout); - } return 0; } From 4437ba7ee7de7e71d11deb91c87a370e4ffd2601 Mon Sep 17 00:00:00 2001 From: Emmanuel Grumbach Date: Wed, 27 Dec 2017 08:58:02 +0200 Subject: [PATCH 3/5] iwlwifi: pcie: don't warn if we use all the transmit pointers Our Transmit Frame Descriptor (TFD) is a DMA descriptor that includes several pointers to be able to transmit a packet which is not physically contiguous. Depending on the hardware being use, we can have 20 or 25 pointers in a single TFD. In both cases, it is more than enough and it is quite hard to hit this limit. It has been reported that when using specific applications (Ktorrent), we can actually use all the pointers and then a long standing bug showed up. When we free the TFD, we check its number of valid pointers and make sure it doesn't exceed the number of pointers the hardware support. This check had an off by one bug: it is perfectly valid to free the 20 pointers if the TFD has 20 pointers. Fix that. https://bugzilla.kernel.org/show_bug.cgi?id=197981 Signed-off-by: Emmanuel Grumbach Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c | 2 +- drivers/net/wireless/intel/iwlwifi/pcie/tx.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c index 6d0a907d5ba5..fabae0f60683 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c @@ -147,7 +147,7 @@ static void iwl_pcie_gen2_tfd_unmap(struct iwl_trans *trans, /* Sanity check on number of chunks */ num_tbs = iwl_pcie_gen2_get_num_tbs(trans, tfd); - if (num_tbs >= trans_pcie->max_tbs) { + if (num_tbs > trans_pcie->max_tbs) { IWL_ERR(trans, "Too many chunks: %i\n", num_tbs); return; } diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c index 3f85713c41dc..1a566287993d 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c @@ -378,7 +378,7 @@ static void iwl_pcie_tfd_unmap(struct iwl_trans *trans, /* Sanity check on number of chunks */ num_tbs = iwl_pcie_tfd_get_num_tbs(trans, tfd); - if (num_tbs >= trans_pcie->max_tbs) { + if (num_tbs > trans_pcie->max_tbs) { IWL_ERR(trans, "Too many chunks: %i\n", num_tbs); /* @todo issue fatal error, it is quite serious situation */ return; From 4b7f7ee2a5f523cf002328c6c02cb3e28a0fb30b Mon Sep 17 00:00:00 2001 From: Shaul Triebitz Date: Thu, 28 Dec 2017 13:28:30 +0200 Subject: [PATCH 4/5] iwlwifi: align timestamp cancel with timestamp start Canceling the periodic timestamp work should be done in the opposite flow to where it was started. This also prevents from sending the MARKER command during the mac_stop flow - causing a false queue hang (FW is no longer there to send a response). Fixes: 93b167c13a3a ("iwlwifi: runtime: sync FW and host clocks for logs") Signed-off-by: Shaul Triebitz Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/fw/init.c | 6 ------ drivers/net/wireless/intel/iwlwifi/mvm/mvm.h | 2 ++ drivers/net/wireless/intel/iwlwifi/mvm/ops.c | 2 -- 3 files changed, 2 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/fw/init.c b/drivers/net/wireless/intel/iwlwifi/fw/init.c index c39fe84bb4c4..45f21acbd842 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/init.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/init.c @@ -76,9 +76,3 @@ void iwl_fw_runtime_init(struct iwl_fw_runtime *fwrt, struct iwl_trans *trans, iwl_fwrt_dbgfs_register(fwrt, dbgfs_dir); } IWL_EXPORT_SYMBOL(iwl_fw_runtime_init); - -void iwl_fw_runtime_exit(struct iwl_fw_runtime *fwrt) -{ - iwl_fw_cancel_timestamp(fwrt); -} -IWL_EXPORT_SYMBOL(iwl_fw_runtime_exit); diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h index 2d28e0804218..89ff02d7c876 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h @@ -90,6 +90,7 @@ #include "fw/runtime.h" #include "fw/dbg.h" #include "fw/acpi.h" +#include "fw/debugfs.h" #define IWL_MVM_MAX_ADDRESSES 5 /* RSSI offset for WkP */ @@ -1783,6 +1784,7 @@ static inline u32 iwl_mvm_flushable_queues(struct iwl_mvm *mvm) static inline void iwl_mvm_stop_device(struct iwl_mvm *mvm) { + iwl_fw_cancel_timestamp(&mvm->fwrt); iwl_free_fw_paging(&mvm->fwrt); clear_bit(IWL_MVM_STATUS_FIRMWARE_RUNNING, &mvm->status); iwl_fw_dump_conf_clear(&mvm->fwrt); diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c index 5d525a0023dc..6bb347bf0d6e 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c @@ -802,7 +802,6 @@ iwl_op_mode_mvm_start(struct iwl_trans *trans, const struct iwl_cfg *cfg, iwl_mvm_leds_exit(mvm); iwl_mvm_thermal_exit(mvm); out_free: - iwl_fw_runtime_exit(&mvm->fwrt); iwl_fw_flush_dump(&mvm->fwrt); if (iwlmvm_mod_params.init_dbg) @@ -843,7 +842,6 @@ static void iwl_op_mode_mvm_stop(struct iwl_op_mode *op_mode) #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_IWLWIFI_DEBUGFS) kfree(mvm->d3_resume_sram); #endif - iwl_fw_runtime_exit(&mvm->fwrt); iwl_trans_op_mode_leave(mvm->trans); iwl_phy_db_free(mvm->phy_db); From 6b7a5aea71b342ec0593d23b08383e1f33da4c9a Mon Sep 17 00:00:00 2001 From: Naftali Goldstein Date: Thu, 28 Dec 2017 15:53:04 +0200 Subject: [PATCH 5/5] iwlwifi: mvm: always init rs with 20mhz bandwidth rates In AP mode, when a new station associates, rs is initialized immediately upon association completion, before the phy context is updated with the association parameters, so the sta bandwidth might be wider than the phy context allows. To avoid this issue, always initialize rs with 20mhz bandwidth rate, and after authorization, when the phy context is already up-to-date, re-init rs with the correct bw. Signed-off-by: Naftali Goldstein Signed-off-by: Luca Coelho --- .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 4 +++ drivers/net/wireless/intel/iwlwifi/mvm/rs.c | 28 +++++++++++++------ 2 files changed, 24 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c index 8aed40a8bc38..08de822c3ef0 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c @@ -2682,6 +2682,10 @@ static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw, /* enable beacon filtering */ WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0)); + + iwl_mvm_rs_rate_init(mvm, sta, mvmvif->phy_ctxt->channel->band, + false); + ret = 0; } else if (old_state == IEEE80211_STA_AUTHORIZED && new_state == IEEE80211_STA_ASSOC) { diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c index 60abb0084ee5..47f4c7a1d80d 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/rs.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs.c @@ -2684,7 +2684,8 @@ static void rs_get_initial_rate(struct iwl_mvm *mvm, struct ieee80211_sta *sta, struct iwl_lq_sta *lq_sta, enum nl80211_band band, - struct rs_rate *rate) + struct rs_rate *rate, + bool init) { int i, nentries; unsigned long active_rate; @@ -2738,14 +2739,25 @@ static void rs_get_initial_rate(struct iwl_mvm *mvm, */ if (sta->vht_cap.vht_supported && best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) { - switch (sta->bandwidth) { - case IEEE80211_STA_RX_BW_160: - case IEEE80211_STA_RX_BW_80: - case IEEE80211_STA_RX_BW_40: + /* + * In AP mode, when a new station associates, rs is initialized + * immediately upon association completion, before the phy + * context is updated with the association parameters, so the + * sta bandwidth might be wider than the phy context allows. + * To avoid this issue, always initialize rs with 20mhz + * bandwidth rate, and after authorization, when the phy context + * is already up-to-date, re-init rs with the correct bw. + */ + u32 bw = init ? RATE_MCS_CHAN_WIDTH_20 : rs_bw_from_sta_bw(sta); + + switch (bw) { + case RATE_MCS_CHAN_WIDTH_40: + case RATE_MCS_CHAN_WIDTH_80: + case RATE_MCS_CHAN_WIDTH_160: initial_rates = rs_optimal_rates_vht; nentries = ARRAY_SIZE(rs_optimal_rates_vht); break; - case IEEE80211_STA_RX_BW_20: + case RATE_MCS_CHAN_WIDTH_20: initial_rates = rs_optimal_rates_vht_20mhz; nentries = ARRAY_SIZE(rs_optimal_rates_vht_20mhz); break; @@ -2756,7 +2768,7 @@ static void rs_get_initial_rate(struct iwl_mvm *mvm, active_rate = lq_sta->active_siso_rate; rate->type = LQ_VHT_SISO; - rate->bw = rs_bw_from_sta_bw(sta); + rate->bw = bw; } else if (sta->ht_cap.ht_supported && best_rssi > IWL_RS_LOW_RSSI_THRESHOLD) { initial_rates = rs_optimal_rates_ht; @@ -2839,7 +2851,7 @@ static void rs_initialize_lq(struct iwl_mvm *mvm, tbl = &(lq_sta->lq_info[active_tbl]); rate = &tbl->rate; - rs_get_initial_rate(mvm, sta, lq_sta, band, rate); + rs_get_initial_rate(mvm, sta, lq_sta, band, rate, init); rs_init_optimal_rate(mvm, sta, lq_sta); WARN_ONCE(rate->ant != ANT_A && rate->ant != ANT_B,