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,URIBL_BLOCKED,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 4CCDCC43331 for ; Wed, 1 Apr 2020 16:33:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 91D622137B for ; Wed, 1 Apr 2020 16:33:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585758783; bh=ghDfLd7SVVS3Vf39RZ3MLTXeN9O5LKa3h+M3tjtUbtI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=P+iFOxNQ6VNMcLEGlCXz9tDD8M9pPDkUvAtZF9gozg+AIqY5/PDM0KT6+b6iLzHYs aJHl1ITxc08GbG2XbcjRtR4n9SzIk0kxipQQYh3uA9puH9BynGscU866onU1gtHYrb s5QFsfdk0UMmRDDP5PsMC4Z5Pys2wMJ5bGp49BQQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388486AbgDAQdC (ORCPT ); Wed, 1 Apr 2020 12:33:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:59438 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732540AbgDAQc5 (ORCPT ); Wed, 1 Apr 2020 12:32:57 -0400 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 B9A8120658; Wed, 1 Apr 2020 16:32:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585758777; bh=ghDfLd7SVVS3Vf39RZ3MLTXeN9O5LKa3h+M3tjtUbtI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vLn7O2BmmJspylgr3Bt7qcnU8BEPKHnTMw79KV3+agRIH0U1MGGAXbYnUFkKtG5ea thNvmhxUVqa/dIfdRHWkynUjBPpjCxveFwvVkPSKSFIZSwliVypdRILG98ZmCJpnLL 3E9anWjcBvAqYwNxIUbaKxGbtTIXweenVxBAvDW8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Oliver Neukum , Johan Hovold , Sean Young , Mauro Carvalho Chehab Subject: [PATCH 4.4 73/91] media: flexcop-usb: fix endpoint sanity check Date: Wed, 1 Apr 2020 18:18:09 +0200 Message-Id: <20200401161537.231970310@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200401161512.917494101@linuxfoundation.org> References: <20200401161512.917494101@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 bca243b1ce0e46be26f7c63b5591dfbb41f558e5 upstream. commit 1b976fc6d684 ("media: b2c2-flexcop-usb: add sanity checking") added an endpoint sanity check to address a NULL-pointer dereference on probe. Unfortunately the check was done on the current altsetting which was later changed. Fix this by moving the sanity check to after the altsetting is changed. Fixes: 1b976fc6d684 ("media: b2c2-flexcop-usb: add sanity checking") Cc: Oliver Neukum Cc: stable Signed-off-by: Johan Hovold Signed-off-by: Sean Young Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/usb/b2c2/flexcop-usb.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/media/usb/b2c2/flexcop-usb.c +++ b/drivers/media/usb/b2c2/flexcop-usb.c @@ -481,6 +481,9 @@ static int flexcop_usb_init(struct flexc return ret; } + if (fc_usb->uintf->cur_altsetting->desc.bNumEndpoints < 1) + return -ENODEV; + switch (fc_usb->udev->speed) { case USB_SPEED_LOW: err("cannot handle USB speed because it is too slow."); @@ -514,9 +517,6 @@ static int flexcop_usb_probe(struct usb_ struct flexcop_device *fc = NULL; int ret; - if (intf->cur_altsetting->desc.bNumEndpoints < 1) - return -ENODEV; - if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_usb))) == NULL) { err("out of memory\n"); return -ENOMEM;