From patchwork Sun Jun 4 09:11:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Greenman, Gregory" X-Patchwork-Id: 689205 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 724CEC7EE23 for ; Sun, 4 Jun 2023 09:12:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231172AbjFDJMf (ORCPT ); Sun, 4 Jun 2023 05:12:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38220 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231168AbjFDJMe (ORCPT ); Sun, 4 Jun 2023 05:12:34 -0400 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0C06CED for ; Sun, 4 Jun 2023 02:12:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685869944; x=1717405944; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=D4JGyonbHwsNgfZLbAYoPEbrTPtTh2H+jY5Som0s7+o=; b=cWLUD8oK44sW4nOOfGtSu3O3qlpDQBFwFF38DvdGchqONDdkDwbO+3wz lA3xdjD+4LO9w1FFl1v7hsvHSr637YGp6UNdWBa2iDVa+AqU+0bnsWzeE M0buWB0ejyQMQ7TUNKx2OqSKaEKGYH+e/KXHA9xo/c5f33J5U+frPJyIE AZl7ETBsgH0FFQ19CxcWkYhI7GMOcIsts4lizqEZyo4GboZB3yVUmLwsU WG+ADVgdd3b7/EXRfE+Rw3X6A26oVRGyd7uHh/X4EdErBipQyP3XNWz13 dLnfr4ZDmkIf9B2j7s/BQoylR0WcdWqu3J6ooLP1oZ9WyLLdR3oZ9ejcz A==; X-IronPort-AV: E=McAfee;i="6600,9927,10730"; a="336526555" X-IronPort-AV: E=Sophos;i="6.00,217,1681196400"; d="scan'208";a="336526555" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Jun 2023 02:12:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10730"; a="820804828" X-IronPort-AV: E=Sophos;i="6.00,217,1681196400"; d="scan'208";a="820804828" Received: from yfruchte-mobl3.ger.corp.intel.com (HELO ggreenma-mobl2.intel.com) ([10.214.219.60]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Jun 2023 02:12:16 -0700 From: gregory.greenman@intel.com To: johannes@sipsolutions.net Cc: linux-wireless@vger.kernel.org, Ilan Peer , Gregory Greenman Subject: [PATCH 15/16] wifi: mac80211_hwsim: Fix possible NULL dereference Date: Sun, 4 Jun 2023 12:11:27 +0300 Message-Id: <20230604120651.f4d889fc98c4.Iae85f527ed245a37637a874bb8b8c83d79812512@changeid> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230604091128.609335-1-gregory.greenman@intel.com> References: <20230604091128.609335-1-gregory.greenman@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Ilan Peer In a call to mac80211_hwsim_select_tx_link() the sta pointer might be NULL, thus need to check that it is not NULL before accessing it. Signed-off-by: Ilan Peer Signed-off-by: Gregory Greenman --- drivers/net/wireless/virtual/mac80211_hwsim.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/virtual/mac80211_hwsim.c b/drivers/net/wireless/virtual/mac80211_hwsim.c index b06a6e78169d..c706abbdaa17 100644 --- a/drivers/net/wireless/virtual/mac80211_hwsim.c +++ b/drivers/net/wireless/virtual/mac80211_hwsim.c @@ -4,7 +4,7 @@ * Copyright (c) 2008, Jouni Malinen * Copyright (c) 2011, Javier Lopez * Copyright (c) 2016 - 2017 Intel Deutschland GmbH - * Copyright (C) 2018 - 2022 Intel Corporation + * Copyright (C) 2018 - 2023 Intel Corporation */ /* @@ -1865,7 +1865,7 @@ mac80211_hwsim_select_tx_link(struct mac80211_hwsim_data *data, WARN_ON(is_multicast_ether_addr(hdr->addr1)); - if (WARN_ON_ONCE(!sta->valid_links)) + if (WARN_ON_ONCE(!sta || !sta->valid_links)) return &vif->bss_conf; for (i = 0; i < ARRAY_SIZE(vif->link_conf); i++) {