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 D7E50C33CB3 for ; Tue, 14 Jan 2020 10:18:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AF135207FF for ; Tue, 14 Jan 2020 10:18:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578997119; bh=2m06gkz84QLde4drCqbnIjIW6b8Xjt+SP/Y7t00iEcI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=q5fx3ZrN7qwZEHk07s2WoiW+bBvqsk26cFjk02YB7rvpNeAV4i3ID1KQrJztwrFWx MjNycwG/cBDyZZ2JEv4UJF0kDi3l+t/Nt7LkB2KTAZkyAy9m5DEiBGx1Qg1PGnBitQ Q8V3Z/hyxtSnHVl3E1BvYuzv38+kNe5cA4nUoE70= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730242AbgANKHc (ORCPT ); Tue, 14 Jan 2020 05:07:32 -0500 Received: from mail.kernel.org ([198.145.29.99]:37616 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729431AbgANKHY (ORCPT ); Tue, 14 Jan 2020 05:07:24 -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 1C86724679; Tue, 14 Jan 2020 10:07:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578996443; bh=2m06gkz84QLde4drCqbnIjIW6b8Xjt+SP/Y7t00iEcI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NlsUGcifsQ1gu9Fv3T+VELcbB//ZWnIX+1zodjMrL3iNWqPbV3PgEA9b7aY9EEQ1E uw8GognstJY66McirMB0PKdvhQ+UEzcV0xDsfQfCplMXZkrsNd2/phMwmKXx5HIdqQ ywmmegWY0WHXULlt+NdkLS5YshxIlWaUWOwDH14k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jimmy Assarsson , Christer Beskow , Nicklas Johansson , Martin Henriksson , Johan Hovold , Marc Kleine-Budde Subject: [PATCH 4.19 19/46] can: kvaser_usb: fix interface sanity check Date: Tue, 14 Jan 2020 11:01:36 +0100 Message-Id: <20200114094344.407711257@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200114094339.608068818@linuxfoundation.org> References: <20200114094339.608068818@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 5660493c637c9d83786f1c9297f403eae44177b6 upstream. Make sure to use the current alternate setting when verifying the interface descriptors 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: aec5fb2268b7 ("can: kvaser_usb: Add support for Kvaser USB hydra family") Cc: stable # 4.19 Cc: Jimmy Assarsson Cc: Christer Beskow Cc: Nicklas Johansson Cc: Martin Henriksson Signed-off-by: Johan Hovold Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman --- drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c | 2 +- drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c @@ -1590,7 +1590,7 @@ static int kvaser_usb_hydra_setup_endpoi struct usb_endpoint_descriptor *ep; int i; - iface_desc = &dev->intf->altsetting[0]; + iface_desc = dev->intf->cur_altsetting; for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { ep = &iface_desc->endpoint[i].desc; --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c @@ -1310,7 +1310,7 @@ static int kvaser_usb_leaf_setup_endpoin struct usb_endpoint_descriptor *endpoint; int i; - iface_desc = &dev->intf->altsetting[0]; + iface_desc = dev->intf->cur_altsetting; for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { endpoint = &iface_desc->endpoint[i].desc;