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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 8A580C11F66 for ; Mon, 12 Jul 2021 08:15:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 71CD4613E4 for ; Mon, 12 Jul 2021 08:15:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356329AbhGLIQX (ORCPT ); Mon, 12 Jul 2021 04:16:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:49570 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347015AbhGLHbZ (ORCPT ); Mon, 12 Jul 2021 03:31:25 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id A90916052B; Mon, 12 Jul 2021 07:28:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626074916; bh=qPRuWdfF0zru4a0Jn/Yv/kXqJxzpZugb6RKDhEzNdAE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oYinCXSkWxXdnxjzBNwxXRE+0RiB4y/7/JW/zf9IPUK7HvsXbM+/YyChfX/NnZDOJ SHd8mBc4An7WN8T85ZV6TDkTSZayWnmcl1y3OefiklFItse9AaEvNfPETm1sz8Hbbh YQDuGhAUIZCsQaXjkhthPDaZLMiZ4DGe0S3o+PHM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Rocky Liao , Pavel Skripkin , Johan Hovold , Marcel Holtmann Subject: [PATCH 5.13 001/800] Bluetooth: hci_qca: fix potential GPF Date: Mon, 12 Jul 2021 08:00:24 +0200 Message-Id: <20210712060913.184271719@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060912.995381202@linuxfoundation.org> References: <20210712060912.995381202@linuxfoundation.org> User-Agent: quilt/0.66 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Pavel Skripkin commit 59f90f1351282ea2dbd0c59098fd9bb2634e920e upstream. In qca_power_shutdown() qcadev local variable is initialized by hu->serdev.dev private data, but hu->serdev can be NULL and there is a check for it. Since, qcadev is not used before if (!hu->serdev) return; we can move its initialization after this "if" to prevent GPF. Fixes: 5559904ccc08 ("Bluetooth: hci_qca: Add QCA Rome power off support to the qca_power_shutdown()") Cc: stable@vger.kernel.org # v5.6+ Cc: Rocky Liao Signed-off-by: Pavel Skripkin Reviewed-by: Johan Hovold Signed-off-by: Marcel Holtmann Signed-off-by: Greg Kroah-Hartman --- drivers/bluetooth/hci_qca.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1835,8 +1835,6 @@ static void qca_power_shutdown(struct hc unsigned long flags; enum qca_btsoc_type soc_type = qca_soc_type(hu); - qcadev = serdev_device_get_drvdata(hu->serdev); - /* From this point we go into power off state. But serial port is * still open, stop queueing the IBS data and flush all the buffered * data in skb's. @@ -1852,6 +1850,8 @@ static void qca_power_shutdown(struct hc if (!hu->serdev) return; + qcadev = serdev_device_get_drvdata(hu->serdev); + if (qca_is_wcn399x(soc_type)) { host_set_baudrate(hu, 2400); qca_send_power_pulse(hu, false);