From patchwork Tue Jan 28 14:06:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 232587 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 70F17C2D0DB for ; Tue, 28 Jan 2020 14:33:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3CFBD20716 for ; Tue, 28 Jan 2020 14:33:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580222009; bh=6Zf7WpmE37b/Hbx0ZBYx+MP+UHtZ5PHCF50LJoYk9ZQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Agy7dA4qqthy12T5DlG7R8DE8pSbn0T9GiItfLz/r+3yLrTHF+cnA73GBsYw6zIJ8 pxsq5kSqaHGkGqHDUdbguKnT+xCZEnasBT2CYMfPwKqscfzgic5fyr1ifKdLug6Ay+ 5yzHyVoilmqrzTLIlRyMjJcA1HwNGNJsbN2VqAVk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729937AbgA1OZO (ORCPT ); Tue, 28 Jan 2020 09:25:14 -0500 Received: from mail.kernel.org ([198.145.29.99]:52110 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732471AbgA1OZN (ORCPT ); Tue, 28 Jan 2020 09:25:13 -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 4BA572071E; Tue, 28 Jan 2020 14:25:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580221512; bh=6Zf7WpmE37b/Hbx0ZBYx+MP+UHtZ5PHCF50LJoYk9ZQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RJRCAClgeh+HR9u/Xx9kng1cxVMCU9U+BHzDZmWDGOFOHc7aOJXGaaaFzfYZWGySr AjWcznaT0j1eTTuHmzjSQUdQIwpQqqGxNzkeyS03rfRVIOrbXJAA/dmzH7eOs6p3+u cTTI2xyhvVxwhWU5wdwLbcOYUsM1sG30oAObYieo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold , Vladis Dronov , Dmitry Torokhov Subject: [PATCH 4.9 254/271] Input: aiptek - fix endpoint sanity check Date: Tue, 28 Jan 2020 15:06:43 +0100 Message-Id: <20200128135911.487974997@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200128135852.449088278@linuxfoundation.org> References: <20200128135852.449088278@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Johan Hovold commit 3111491fca4f01764e0c158c5e0f7ced808eef51 upstream. The driver was checking the number of endpoints of the first alternate setting instead of the current one, something which could lead to the driver binding to an invalid interface. This in turn 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: 8e20cf2bce12 ("Input: aiptek - fix crash on detecting device without endpoints") Signed-off-by: Johan Hovold Acked-by: Vladis Dronov Link: https://lore.kernel.org/r/20191210113737.4016-3-johan@kernel.org Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- drivers/input/tablet/aiptek.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/input/tablet/aiptek.c +++ b/drivers/input/tablet/aiptek.c @@ -1822,14 +1822,14 @@ aiptek_probe(struct usb_interface *intf, input_set_abs_params(inputdev, ABS_WHEEL, AIPTEK_WHEEL_MIN, AIPTEK_WHEEL_MAX - 1, 0, 0); /* Verify that a device really has an endpoint */ - if (intf->altsetting[0].desc.bNumEndpoints < 1) { + if (intf->cur_altsetting->desc.bNumEndpoints < 1) { dev_err(&intf->dev, "interface has %d endpoints, but must have minimum 1\n", - intf->altsetting[0].desc.bNumEndpoints); + intf->cur_altsetting->desc.bNumEndpoints); err = -EINVAL; goto fail3; } - endpoint = &intf->altsetting[0].endpoint[0].desc; + endpoint = &intf->cur_altsetting->endpoint[0].desc; /* Go set up our URB, which is called when the tablet receives * input.