From patchwork Sat Nov 26 10:06:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yuan Can X-Patchwork-Id: 13056427 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 5B302C4332F for ; Sat, 26 Nov 2022 10:08:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229611AbiKZKIq (ORCPT ); Sat, 26 Nov 2022 05:08:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38880 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229590AbiKZKIn (ORCPT ); Sat, 26 Nov 2022 05:08:43 -0500 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A36022018A; Sat, 26 Nov 2022 02:08:42 -0800 (PST) Received: from dggpeml500024.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4NK6qn4RxrzmW9H; Sat, 26 Nov 2022 18:08:05 +0800 (CST) Received: from huawei.com (10.175.112.208) by dggpeml500024.china.huawei.com (7.185.36.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Sat, 26 Nov 2022 18:08:40 +0800 From: Yuan Can To: , , , , , , , , CC: Subject: [PATCH 2/2] wifi: nl80211: Add checks for nla_nest_start() in nl80211_send_iface() Date: Sat, 26 Nov 2022 10:06:34 +0000 Message-ID: <20221126100634.106887-3-yuancan@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20221126100634.106887-1-yuancan@huawei.com> References: <20221126100634.106887-1-yuancan@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.112.208] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggpeml500024.china.huawei.com (7.185.36.10) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org As the nla_nest_start() may fail with NULL returned, the return value needs to be checked. Fixes: ce08cd344a00 ("wifi: nl80211: expose link information for interfaces") Signed-off-by: Yuan Can --- net/wireless/nl80211.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 597c52236514..d2321c683398 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -3868,6 +3868,9 @@ static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flag struct cfg80211_chan_def chandef = {}; int ret; + if (!link) + goto nla_put_failure; + if (nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link_id)) goto nla_put_failure; if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN,