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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60C17C2BB86 for ; Sat, 11 Apr 2020 23:23:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 39D8821655 for ; Sat, 11 Apr 2020 23:23:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586647383; bh=i9gxExS+y61Jh1kWHem0h4HuFrd8LANVfyJ9gZaCcn0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=kXktFi4u5ApYndjBz0uEObBucDQRucP7BvAfiVL7ump0PIT5Wm4bodO9jqhWVqmW3 ZeHpBB02J4inoknI+HJaIMjxskPs1AW6N0dOkNiJDWG8UeWw8rnF4U+cDYj5S8QKer TAOASjpdRcFpwkL43MtFtUJ/rBu4QA07hvcUwA8M= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730338AbgDKXNI (ORCPT ); Sat, 11 Apr 2020 19:13:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:53370 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730255AbgDKXMt (ORCPT ); Sat, 11 Apr 2020 19:12:49 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C0F9A20CC7; Sat, 11 Apr 2020 23:12:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586646769; bh=i9gxExS+y61Jh1kWHem0h4HuFrd8LANVfyJ9gZaCcn0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ggu85g9OciioGqiHiwvhTyRCMv1EmzGQ/n92s0il4zuRG9sPAwE6srzTTzkGrCG+Q ki1l9KsETzdQ++nZhyws2sJGpNa4v1/G/JKRjpmkt6KwJgLATJV/vLo6ET7kxwVRIg nVP7kfaJuYRXLeVkW99LTXFQYWQ4wDW7o3Uj8AKM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Martin Kepplinger , Kalle Valo , Sasha Levin , linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 38/66] rsi: fix null pointer dereference during rsi_shutdown() Date: Sat, 11 Apr 2020 19:11:35 -0400 Message-Id: <20200411231203.25933-38-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200411231203.25933-1-sashal@kernel.org> References: <20200411231203.25933-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Martin Kepplinger [ Upstream commit 16bbc3eb83728c03138191a5d23d84d38175fa26 ] Appearently the hw pointer can be NULL while the module is loaded and in that case rsi_shutdown() crashes due to the unconditional dereference. Signed-off-by: Martin Kepplinger Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin --- drivers/net/wireless/rsi/rsi_91x_sdio.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/rsi/rsi_91x_sdio.c b/drivers/net/wireless/rsi/rsi_91x_sdio.c index 81cc1044532d1..fee43cd882f8f 100644 --- a/drivers/net/wireless/rsi/rsi_91x_sdio.c +++ b/drivers/net/wireless/rsi/rsi_91x_sdio.c @@ -1357,12 +1357,15 @@ static void rsi_shutdown(struct device *dev) struct rsi_91x_sdiodev *sdev = (struct rsi_91x_sdiodev *)adapter->rsi_dev; struct ieee80211_hw *hw = adapter->hw; - struct cfg80211_wowlan *wowlan = hw->wiphy->wowlan_config; rsi_dbg(ERR_ZONE, "SDIO Bus shutdown =====>\n"); - if (rsi_config_wowlan(adapter, wowlan)) - rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n"); + if (hw) { + struct cfg80211_wowlan *wowlan = hw->wiphy->wowlan_config; + + if (rsi_config_wowlan(adapter, wowlan)) + rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n"); + } if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 && adapter->priv->bt_adapter) { -- 2.20.1