From patchwork Thu Dec 23 17:51:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Muhammad Usama Anjum X-Patchwork-Id: 527956 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 35B26C433F5 for ; Thu, 23 Dec 2021 17:51:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244673AbhLWRvY (ORCPT ); Thu, 23 Dec 2021 12:51:24 -0500 Received: from bhuna.collabora.co.uk ([46.235.227.227]:58722 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229962AbhLWRvU (ORCPT ); Thu, 23 Dec 2021 12:51:20 -0500 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: usama.anjum) with ESMTPSA id 61C811F45B43 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1640281879; bh=vSHHzM172vviSgHfuy9G5kDiYvUz/KyNzVxzK+d+55s=; h=Date:From:To:Cc:Subject:From; b=Z96U0ih/lxwTzQ1z7q++gg8g8D9E3t56qzlFhKGr0wSnqorf543tJ0xXHwwq97fIv Zpzd5b9Vfh+oLhXniDkqQQ/xrPDZKcicbCJ5vXk4vbBoBCJ2G/HKoS3clPPkUPqo1L oLCCF6dRi2Fft3ejIw9fST/QYms1yiqlGSVmd4SBU1Ll0jWtl7Zf40zl9Bled4Xsep b5UNblnXF+A+Y6x9ZOJ8OF2egs999+KC4QaBd2Jyl0X1eWaMLbY+uab0/19uTyVvE6 X6qr0BJRvcetA/Lf3x4IbXpEmtTFMT0BE4O48dbiCQzDDUJoXUr+xsCVDKbJQWCtgs azxWIRkHDUj/A== Date: Thu, 23 Dec 2021 22:51:11 +0500 From: Muhammad Usama Anjum To: Yan-Hsuan Chuang , Kalle Valo , "David S. Miller" , Jakub Kicinski , Ping-Ke Shih , Po-Hao Huang , "open list:REALTEK WIRELESS DRIVER (rtw88)" , "open list:NETWORKING DRIVERS" , open list Cc: usama.anjum@collabora.com, kernel@collabora.com Subject: [PATCH] rtw88: check for validity before using pointer Message-ID: MIME-Version: 1.0 Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org ieee80211_probereq_get() can return NULL. Pointer skb should be checked for validty before use. Fixes: 10d162b2ed39 ("rtw88: 8822c: add ieee80211_ops::hw_scan") Signed-off-by: Muhammad Usama Anjum --- drivers/net/wireless/realtek/rtw88/fw.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireless/realtek/rtw88/fw.c b/drivers/net/wireless/realtek/rtw88/fw.c index 2f7c036f9022..0fc05a810d05 100644 --- a/drivers/net/wireless/realtek/rtw88/fw.c +++ b/drivers/net/wireless/realtek/rtw88/fw.c @@ -1866,6 +1866,8 @@ static int rtw_hw_scan_update_probe_req(struct rtw_dev *rtwdev, req->ssids[i].ssid, req->ssids[i].ssid_len, req->ie_len); + if (!skb) + return -ENOMEM; rtw_append_probe_req_ie(rtwdev, skb, &list, rtwvif); kfree_skb(skb); }