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=ham 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 775DCC2D0DB for ; Tue, 28 Jan 2020 14:00:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4C7B824691 for ; Tue, 28 Jan 2020 14:00:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580220009; bh=6Zf7WpmE37b/Hbx0ZBYx+MP+UHtZ5PHCF50LJoYk9ZQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Nv49h1SxcXU855DvL+yIaqPmGpllwJ+FEeCmjM2+b4f+1LO0z+DOqgdBhTT2+rvDs ifIq6nrIAtPPh/8townegBMp9jEU7nrX2Kga15T7rgNOAQ32waEi7wRqac0YMfdmg9 YyVcIJjLqbi2r7oruNFA+fNPhdbEvvCb/5+GL8eE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727215AbgA1OAI (ORCPT ); Tue, 28 Jan 2020 09:00:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:45692 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726273AbgA1OAF (ORCPT ); Tue, 28 Jan 2020 09:00:05 -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 5F6C02468A; Tue, 28 Jan 2020 14:00:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580220004; bh=6Zf7WpmE37b/Hbx0ZBYx+MP+UHtZ5PHCF50LJoYk9ZQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZnLi41eVAGk91TayeClCMclDaZJOcSPqfTslY+8HZXNeazT1WFW06DiCyZ4QzHvuC ZOcus2cHwL/8BQNgR9EKGS/Pi6euzo06YJfMJxYSaKzK3Gjg6Bt0tD9cG5BhKWjLJu hEqC0z9tTCzkDKsoEU3hSjoseu8Rhj2wPNwEaRTc= 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 4.14 30/46] Input: aiptek - fix endpoint sanity check Date: Tue, 28 Jan 2020 14:58:04 +0100 Message-Id: <20200128135753.992900345@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200128135749.822297911@linuxfoundation.org> References: <20200128135749.822297911@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 @@ -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.