From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 763E4C43219 for ; Thu, 13 Oct 2022 19:36:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229823AbiJMTgW (ORCPT ); Thu, 13 Oct 2022 15:36:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32904 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229762AbiJMTgU (ORCPT ); Thu, 13 Oct 2022 15:36:20 -0400 Received: from nbd.name (nbd.name [46.4.11.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C26317C54A for ; Thu, 13 Oct 2022 12:36:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=nbd.name; s=20160729; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=It4jByTPo6kXjsj6KYFguxl1CvHt97DlNU4T6dSsI1I=; b=jWaF8srxFw1c2Vr7VyVPqtRM29 o1g5WtWnGGaM+nxggFGsaiFvez0ioND2yNancvCpYyb4JBc9EgsRJwHqSXtglMOoEuzWsSnYQ6aRo q3b+lKkV6P43BHjSudTbp0Wf1Xa5sTSOCNwpKHrz4votoXHKlZyuTHiDg3LuaaDOryV4=; Received: from p200300daa7301d0028e1e1004b08c350.dip0.t-ipconnect.de ([2003:da:a730:1d00:28e1:e100:4b08:c350] helo=Maecks.lan) by ds12 with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (Exim 4.94.2) (envelope-from ) id 1oj2kU-00CXRx-RC; Thu, 13 Oct 2022 20:16:02 +0200 From: Felix Fietkau To: stable@vger.kernel.org Cc: johannes@sipsolutions.net Subject: [PATCH 5.15 3/6] mac80211: mlme: find auth challenge directly Date: Thu, 13 Oct 2022 20:15:58 +0200 Message-Id: <20221013181601.5712-3-nbd@nbd.name> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20221013181601.5712-1-nbd@nbd.name> References: <20221013181601.5712-1-nbd@nbd.name> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Johannes Berg commit 49a765d6785e99157ff5091cc37485732496864e upstream. There's no need to parse all elements etc. just to find the authentication challenge - use cfg80211_find_elem() instead. This also allows us to remove WLAN_EID_CHALLENGE handling from the element parsing entirely. Link: https://lore.kernel.org/r/20210920154009.45f9b3a15722.Ice3159ffad03a007d6154cbf1fb3a8c48489e86f@changeid Signed-off-by: Johannes Berg --- net/mac80211/ieee80211_i.h | 2 -- net/mac80211/mlme.c | 11 ++++++----- net/mac80211/util.c | 4 ---- 3 files changed, 6 insertions(+), 11 deletions(-) diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 5ea38ae65809..c5f0ff805010 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1542,7 +1542,6 @@ struct ieee802_11_elems { const u8 *supp_rates; const u8 *ds_params; const struct ieee80211_tim_ie *tim; - const u8 *challenge; const u8 *rsn; const u8 *rsnx; const u8 *erp_info; @@ -1596,7 +1595,6 @@ struct ieee802_11_elems { u8 ssid_len; u8 supp_rates_len; u8 tim_len; - u8 challenge_len; u8 rsn_len; u8 rsnx_len; u8 ext_supp_rates_len; diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 4414e82e71d1..548cd14c5503 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -2889,17 +2889,17 @@ static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, { struct ieee80211_local *local = sdata->local; struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; + const struct element *challenge; u8 *pos; - struct ieee802_11_elems elems; u32 tx_flags = 0; struct ieee80211_prep_tx_info info = { .subtype = IEEE80211_STYPE_AUTH, }; pos = mgmt->u.auth.variable; - ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, - mgmt->bssid, auth_data->bss->bssid); - if (!elems.challenge) + challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, + len - (pos - (u8 *)mgmt)); + if (!challenge) return; auth_data->expected_transaction = 4; drv_mgd_prepare_tx(sdata->local, sdata, &info); @@ -2907,7 +2907,8 @@ static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | IEEE80211_TX_INTFL_MLME_CONN_TX; ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, - elems.challenge - 2, elems.challenge_len + 2, + (void *)challenge, + challenge->datalen + sizeof(*challenge), auth_data->bss->bssid, auth_data->bss->bssid, auth_data->key, auth_data->key_len, auth_data->key_idx, tx_flags); diff --git a/net/mac80211/util.c b/net/mac80211/util.c index ceb6894381e4..664c32b6db19 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1117,10 +1117,6 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, } else elem_parse_failed = true; break; - case WLAN_EID_CHALLENGE: - elems->challenge = pos; - elems->challenge_len = elen; - break; case WLAN_EID_VENDOR_SPECIFIC: if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && pos[2] == 0xf2) { -- 2.36.1