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 15B98C33CB3 for ; Tue, 28 Jan 2020 14:28:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D766421739 for ; Tue, 28 Jan 2020 14:28:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580221730; bh=PnHa2WGSZC8bHIeiKA3V/Rz/XwU6jjMLe5BcD4Ce28o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tXm4M+imvn7Pe+42aJAW0PquBB+xZjfs6esZdPVjK+g8LicVydiWwSXWsvoHAVCG0 lLY0E/5GDzd6627IkS18HnKFJ554yeq/Bm0UWDXFvmkMRdAtwaskTF4UE4LUNmiqqA L92/HeIjAeDdsbeSdbAMwMea4BnIW6rNdStukWJM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733203AbgA1O2s (ORCPT ); Tue, 28 Jan 2020 09:28:48 -0500 Received: from mail.kernel.org ([198.145.29.99]:56690 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733300AbgA1O2i (ORCPT ); Tue, 28 Jan 2020 09:28:38 -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 9412920716; Tue, 28 Jan 2020 14:28:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580221718; bh=PnHa2WGSZC8bHIeiKA3V/Rz/XwU6jjMLe5BcD4Ce28o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EFNIG9qUk0iI1YnB4Pk9mZgSdp7fHGRnwyx7l1aVKZwzoVCPpoxY49DdBu5/r9v8+ NjRfiq3e75hGDv2U/9QN9krJLcY22yyhjfu/6pPWBl88VSYSUAlGddA2EFE3Zfh7Py sZV8hS/SzHfRaz2F/S+Ciea4bKwk3SsLwyMNIAJ4= 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 4.19 36/92] Input: aiptek - fix endpoint sanity check Date: Tue, 28 Jan 2020 15:08:04 +0100 Message-Id: <20200128135813.723853753@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200128135809.344954797@linuxfoundation.org> References: <20200128135809.344954797@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 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 @@ -1815,14 +1815,14 @@ 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.