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 DBBE7C43603 for ; Mon, 16 Dec 2019 18:32:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AAC6F206EC for ; Mon, 16 Dec 2019 18:32:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576521161; bh=GwnxEesexQtVCbUlKAvqAWQdggO4dZDTKWJDHH3wg/4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=LCSyXm2Gd24XqHBg/Q5I97lMYpk9gfHnbjWOfnVXpWxfWfY39bACS8sE1I10WpY/z uRlqo7hK7qTWQlmyu6AW4VYfw/X8xkIIe1SPTTnipex5gizi3XVQxDY5hMzYCaDEpF l38T/DK1SV/JNH27tYWpxs+GeECHcxMFRiuK9Feo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730341AbfLPSKK (ORCPT ); Mon, 16 Dec 2019 13:10:10 -0500 Received: from mail.kernel.org ([198.145.29.99]:53016 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730169AbfLPSKI (ORCPT ); Mon, 16 Dec 2019 13:10:08 -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 CCA242072D; Mon, 16 Dec 2019 18:10:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576519808; bh=GwnxEesexQtVCbUlKAvqAWQdggO4dZDTKWJDHH3wg/4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UFEjok10v6DfafwdrLEkNV5/u9QDUgJB/lNwipLJ9qIXfIjtpUjYtfRt17B9DkT9C HoLEMS7v84GU2KP63FXcG9gF5NYk7YMsuLLDyPRxQ/d09h0R6+S/NHF1RKMOcCrtDG yQ4YTZLQ4BxkCHupz2A7Qp0d5ZGl6DIdYix+qNXQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold Subject: [PATCH 5.3 036/180] USB: serial: io_edgeport: fix epic endpoint lookup Date: Mon, 16 Dec 2019 18:47:56 +0100 Message-Id: <20191216174815.755577993@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191216174806.018988360@linuxfoundation.org> References: <20191216174806.018988360@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@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 @@ -2901,16 +2901,18 @@ 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))) {