From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966285AbeAOMnI (ORCPT + 1 other); Mon, 15 Jan 2018 07:43:08 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:47470 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965782AbeAOMnE (ORCPT ); Mon, 15 Jan 2018 07:43:04 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Spinadel , Johannes Berg , Kalle Valo Subject: [PATCH 4.9 02/96] mac80211: Add RX flag to indicate ICV stripped Date: Mon, 15 Jan 2018 13:34:01 +0100 Message-Id: <20180115123404.499985325@linuxfoundation.org> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180115123404.270241256@linuxfoundation.org> References: <20180115123404.270241256@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: David Spinadel commit cef0acd4d7d4811d2d19cd0195031bf0dfe41249 upstream. Add a flag that indicates that the WEP ICV was stripped from an RX packet, allowing the device to not transfer that if it's already checked. Signed-off-by: David Spinadel Signed-off-by: Johannes Berg Cc: Kalle Valo Signed-off-by: Greg Kroah-Hartman --- include/net/mac80211.h | 5 ++++- net/mac80211/wep.c | 3 ++- net/mac80211/wpa.c | 3 ++- 3 files changed, 8 insertions(+), 3 deletions(-) --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1007,7 +1007,7 @@ ieee80211_tx_info_clear_status(struct ie * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, * verification has been done by the hardware. - * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. + * @RX_FLAG_IV_STRIPPED: The IV and ICV are stripped from this frame. * If this flag is set, the stack cannot do any replay detection * hence the driver or hardware will have to do that. * @RX_FLAG_PN_VALIDATED: Currently only valid for CCMP/GCMP frames, this @@ -1078,6 +1078,8 @@ ieee80211_tx_info_clear_status(struct ie * @RX_FLAG_ALLOW_SAME_PN: Allow the same PN as same packet before. * This is used for AMSDU subframes which can have the same PN as * the first subframe. + * @RX_FLAG_ICV_STRIPPED: The ICV is stripped from this frame. CRC checking must + * be done in the hardware. */ enum mac80211_rx_flags { RX_FLAG_MMIC_ERROR = BIT(0), @@ -1113,6 +1115,7 @@ enum mac80211_rx_flags { RX_FLAG_RADIOTAP_VENDOR_DATA = BIT(31), RX_FLAG_MIC_STRIPPED = BIT_ULL(32), RX_FLAG_ALLOW_SAME_PN = BIT_ULL(33), + RX_FLAG_ICV_STRIPPED = BIT_ULL(34), }; #define RX_FLAG_STBC_SHIFT 26 --- a/net/mac80211/wep.c +++ b/net/mac80211/wep.c @@ -293,7 +293,8 @@ ieee80211_crypto_wep_decrypt(struct ieee return RX_DROP_UNUSABLE; ieee80211_wep_remove_iv(rx->local, rx->skb, rx->key); /* remove ICV */ - if (pskb_trim(rx->skb, rx->skb->len - IEEE80211_WEP_ICV_LEN)) + if (!(status->flag & RX_FLAG_ICV_STRIPPED) && + pskb_trim(rx->skb, rx->skb->len - IEEE80211_WEP_ICV_LEN)) return RX_DROP_UNUSABLE; } --- a/net/mac80211/wpa.c +++ b/net/mac80211/wpa.c @@ -295,7 +295,8 @@ ieee80211_crypto_tkip_decrypt(struct iee return RX_DROP_UNUSABLE; /* Trim ICV */ - skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN); + if (!(status->flag & RX_FLAG_ICV_STRIPPED)) + skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN); /* Remove IV */ memmove(skb->data + IEEE80211_TKIP_IV_LEN, skb->data, hdrlen);