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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 1C4CDC43603 for ; Mon, 16 Dec 2019 17:57:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DFF1D205ED for ; Mon, 16 Dec 2019 17:57:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576519065; bh=Sb3cXim8V9f/HDxtsW8XIz0e8W+QepaRNYmlAa+mlxk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=KGggV6Gb/BFZxlbBn2azTOjrHof/AZhVmprHLfgArw1scL7WYH5kgWFZEqSewORrQ XDYtzw7kbtXZG36ncy/3KV9qbrj+riABEslkhRJOSa28Hep8hECCBz5s44t+vmRy0k jU2ofbSYczpaNSf6hjHzAs/K3+q0Ail034obdTXw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728521AbfLPR5m (ORCPT ); Mon, 16 Dec 2019 12:57:42 -0500 Received: from mail.kernel.org ([198.145.29.99]:56662 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728243AbfLPR5j (ORCPT ); Mon, 16 Dec 2019 12:57:39 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 75AD6205ED; Mon, 16 Dec 2019 17:57:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576519058; bh=Sb3cXim8V9f/HDxtsW8XIz0e8W+QepaRNYmlAa+mlxk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ujENoU6L8HulOyrzcFmlLz746ud6npYmMir/k/+LaYtuiindOZ6U7ueSd4Su6hXX1 2HDq3RkXdeA2KOtny0fOFt7U2ztYmcgZeTtlb1f5gPbwKbl6aNuI3YVnc3GiNPRSh6 fcs1Bt6AHirRVS6yBYL3MVmMSMS9NOXgrXzL0NLs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold Subject: [PATCH 4.14 177/267] USB: serial: io_edgeport: fix epic endpoint lookup Date: Mon, 16 Dec 2019 18:48:23 +0100 Message-Id: <20191216174912.199120347@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191216174848.701533383@linuxfoundation.org> References: <20191216174848.701533383@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Johan Hovold commit 7c5a2df3367a2c4984f1300261345817d95b71f8 upstream. Make sure to use the current alternate setting when looking up the endpoints on epic devices to avoid binding to an invalid interface. Failing to do so could cause the driver to misbehave or trigger a WARN() in usb_submit_urb() that kernels with panic_on_warn set would choke on. Fixes: 6e8cf7751f9f ("USB: add EPIC support to the io_edgeport driver") Cc: stable # 2.6.21 Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20191210112601.3561-5-johan@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/io_edgeport.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -2918,16 +2918,18 @@ static int edge_startup(struct usb_seria response = 0; if (edge_serial->is_epic) { + struct usb_host_interface *alt; + + alt = serial->interface->cur_altsetting; + /* EPIC thing, set up our interrupt polling now and our read * urb, so that the device knows it really is connected. */ interrupt_in_found = bulk_in_found = bulk_out_found = false; - for (i = 0; i < serial->interface->altsetting[0] - .desc.bNumEndpoints; ++i) { + for (i = 0; i < alt->desc.bNumEndpoints; ++i) { struct usb_endpoint_descriptor *endpoint; int buffer_size; - endpoint = &serial->interface->altsetting[0]. - endpoint[i].desc; + endpoint = &alt->endpoint[i].desc; buffer_size = usb_endpoint_maxp(endpoint); if (!interrupt_in_found && (usb_endpoint_is_int_in(endpoint))) {