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 96EC8C4332F for ; Sun, 16 Oct 2022 06:45:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229798AbiJPGpp (ORCPT ); Sun, 16 Oct 2022 02:45:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38858 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229799AbiJPGpo (ORCPT ); Sun, 16 Oct 2022 02:45:44 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5710333423; Sat, 15 Oct 2022 23:45:37 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 613FB60A6F; Sun, 16 Oct 2022 06:45:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73F2AC433C1; Sun, 16 Oct 2022 06:45:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1665902736; bh=DATtFxyW73e4CfeKhfHyo634vm8S27gJN70GI7pPcNw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1xvefH7iBIPVHyJvqneBZ9/ndfW+MwJtItFE2IZ/5B67NUhod6RfBDyf7HVxJu0sE giafrGLCt4Puru/CvSjWjBuP4VBjQzAfD8Zkr0G8tuE0mMG+AZQ7o+FIIubPx98QOp zUe43xRrgCYcP1kuK4Ie/870oI/TFHahBcW6ZR1g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johannes Berg Subject: [PATCH 5.10 2/4] mac80211: mlme: find auth challenge directly Date: Sun, 16 Oct 2022 08:46:12 +0200 Message-Id: <20221016064454.457942478@linuxfoundation.org> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221016064454.382206984@linuxfoundation.org> References: <20221016064454.382206984@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Johannes Berg 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 Signed-off-by: Greg Kroah-Hartman --- net/mac80211/ieee80211_i.h | 2 -- net/mac80211/mlme.c | 11 ++++++----- net/mac80211/util.c | 4 ---- 3 files changed, 6 insertions(+), 11 deletions(-) --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1485,7 +1485,6 @@ 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; @@ -1538,7 +1537,6 @@ 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; --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -2899,14 +2899,14 @@ static void ieee80211_auth_challenge(str { 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; 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, 0); @@ -2914,7 +2914,8 @@ static void ieee80211_auth_challenge(str 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); --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -1124,10 +1124,6 @@ _ieee802_11_parse_elems_crc(const u8 *st } 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) {