From patchwork Wed Mar 1 10:09:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Greenman, Gregory" X-Patchwork-Id: 13155792 X-Patchwork-Delegate: johannes@sipsolutions.net 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 49BC6C7EE36 for ; Wed, 1 Mar 2023 10:11:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229994AbjCAKLF (ORCPT ); Wed, 1 Mar 2023 05:11:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60548 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230109AbjCAKK4 (ORCPT ); Wed, 1 Mar 2023 05:10:56 -0500 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8AF593B3CF for ; Wed, 1 Mar 2023 02:10:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1677665452; x=1709201452; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=OfNSk1dVqOdAcsSzsI3FCNbHkExYJ/PUpNwOIx7vPus=; b=SdrWkShc1KVs8BKlAcJR1wx3nhn+KAVNjJdg07Y5DgmhN0HNf/JLk9NG yVKOovwQCT5CmZERXrRLGdwyqjl70ofWPTdtrt/514smAXjKHfr5Dl8aV 4UTLBwBrk6JZIwy2PIvbiQnIkvAd4r/5YwMvNO0kNsN5LgulNMnSwnGRw E+Wbv3JVNZTAxxEun+9Is/fvhSVAS5zgQftI0cJYU3UBNgk0SRJS8sKKi WG7YXN/tZdPUpDV1V5tnntGKVzxiM9ay6WgVijaw4WmDLNlBOpdlKKmWS 9UkF2XK0M/asqP3F5EPP7o4iJYCGFz1mOgV+AGMLmaew/pH8mP4T+Pdl/ A==; X-IronPort-AV: E=McAfee;i="6500,9779,10635"; a="336662937" X-IronPort-AV: E=Sophos;i="5.98,224,1673942400"; d="scan'208";a="336662937" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Mar 2023 02:10:44 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10635"; a="738589207" X-IronPort-AV: E=Sophos;i="5.98,224,1673942400"; d="scan'208";a="738589207" Received: from omimran-mobl.ger.corp.intel.com (HELO ggreenma-mobl2.intel.com) ([10.249.94.171]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Mar 2023 02:10:43 -0800 From: gregory.greenman@intel.com To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org, Johannes Berg , Gregory Greenman Subject: [PATCH v2 17/23] wifi: nl80211: fix NULL-ptr deref in offchan check Date: Wed, 1 Mar 2023 12:09:29 +0200 Message-Id: <20230301115906.71bd4803fbb9.Iee39c0f6c2d3a59a8227674dc55d52e38b1090cf@changeid> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230301100935.170922-1-gregory.greenman@intel.com> References: <20230301100935.170922-1-gregory.greenman@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Johannes Berg If, e.g. in AP mode, the link was already created by userspace but not activated yet, it has a chandef but the chandef isn't valid and has no channel. Check for this and ignore this link. Fixes: 7b0a0e3c3a88 ("wifi: cfg80211: do some rework towards MLO link APIs") Signed-off-by: Johannes Berg Signed-off-by: Gregory Greenman --- net/wireless/nl80211.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 22dbc30096b2..a42b37de68b0 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -8909,7 +8909,7 @@ static bool cfg80211_off_channel_oper_allowed(struct wireless_dev *wdev, struct cfg80211_chan_def *chandef; chandef = wdev_chandef(wdev, link_id); - if (!chandef) + if (!chandef || !chandef->chan) continue; /*