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=-18.8 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 4DCB9C28CC4 for ; Tue, 2 Mar 2021 06:39:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 30A9261601 for ; Tue, 2 Mar 2021 06:39:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1573095AbhCBDSh (ORCPT ); Mon, 1 Mar 2021 22:18:37 -0500 Received: from mail.kernel.org ([198.145.29.99]:45780 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243256AbhCAUX2 (ORCPT ); Mon, 1 Mar 2021 15:23:28 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3E509653F3; Mon, 1 Mar 2021 18:05:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614621920; bh=6jbua2UHxglhLLVTcJHBXmMy+TvtkbpIqWQxKJ7beZU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HDQZj7GW7Ik8JduZ75A6P67E/4fEiAYyF97qW5pUjxRZrcs5AzyfOuXj8PQuy2Mgt O/k2WxJx8/HY+GuVv4BTzaYvL5QY6E+4DqA8VmHpWytzwLWY0k/0em2kaLINV+lf1S XkKuuTjHw9we4Y5SGh3XhZEQvEP1MMkZoUM+CMpc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Amey Narkhede Subject: [PATCH 5.11 662/775] staging: gdm724x: Fix DMA from stack Date: Mon, 1 Mar 2021 17:13:50 +0100 Message-Id: <20210301161234.096309815@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161201.679371205@linuxfoundation.org> References: <20210301161201.679371205@linuxfoundation.org> User-Agent: quilt/0.66 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: Amey Narkhede commit 7c3a0635cd008eaca9a734dc802709ee0b81cac5 upstream. Stack allocated buffers cannot be used for DMA on all architectures so allocate hci_packet buffer using kmalloc. Reviewed-by: Dan Carpenter Signed-off-by: Amey Narkhede Link: https://lore.kernel.org/r/20210211053819.34858-1-ameynarkhede03@gmail.com Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/staging/gdm724x/gdm_usb.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) --- a/drivers/staging/gdm724x/gdm_usb.c +++ b/drivers/staging/gdm724x/gdm_usb.c @@ -56,20 +56,24 @@ static int gdm_usb_recv(void *priv_dev, static int request_mac_address(struct lte_udev *udev) { - u8 buf[16] = {0,}; - struct hci_packet *hci = (struct hci_packet *)buf; + struct hci_packet *hci; struct usb_device *usbdev = udev->usbdev; int actual; int ret = -1; + hci = kmalloc(struct_size(hci, data, 1), GFP_KERNEL); + if (!hci) + return -ENOMEM; + hci->cmd_evt = gdm_cpu_to_dev16(udev->gdm_ed, LTE_GET_INFORMATION); hci->len = gdm_cpu_to_dev16(udev->gdm_ed, 1); hci->data[0] = MAC_ADDRESS; - ret = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 2), buf, 5, + ret = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 2), hci, 5, &actual, 1000); udev->request_mac_addr = 1; + kfree(hci); return ret; }