Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E669C4332F for ; Mon, 13 Dec 2021 10:05:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236439AbhLMKFB (ORCPT ); Mon, 13 Dec 2021 05:05:01 -0500 Received: from sin.source.kernel.org ([145.40.73.55]:48236 "EHLO sin.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238133AbhLMJ7y (ORCPT ); Mon, 13 Dec 2021 04:59:54 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 46E6ECE0F1C; Mon, 13 Dec 2021 09:59:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BC6EBC34602; Mon, 13 Dec 2021 09:59:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1639389590; bh=H7Qak2Uu8GQGaaJfU4DC3QJww0IaBikf2/9RwFQyyQo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rYqPzLNGRRPfhJOSoE/1n/grASjW84ymxaiZJZ94cSDnoGw9C6QTyxM4j8140d2XK que4ZYxJovv28D18swLptBWuBgdqC2HjlJdZI8UpXioujPWUNrJbeTYd0j0bAHo4XB Ay2rBb2ECbOOavyCnoMvDvG/gvMNuJpNG5zXDt0s= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alan Stern , Pavel Hofman Subject: [PATCH 5.15 139/171] usb: core: config: fix validation of wMaxPacketValue entries Date: Mon, 13 Dec 2021 10:30:54 +0100 Message-Id: <20211213092949.714921110@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211213092945.091487407@linuxfoundation.org> References: <20211213092945.091487407@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Pavel Hofman commit 1a3910c80966e4a76b25ce812f6bea0ef1b1d530 upstream. The checks performed by commit aed9d65ac327 ("USB: validate wMaxPacketValue entries in endpoint descriptors") require that initial value of the maxp variable contains both maximum packet size bits (10..0) and multiple-transactions bits (12..11). However, the existing code assings only the maximum packet size bits. This patch assigns all bits of wMaxPacketSize to the variable. Fixes: aed9d65ac327 ("USB: validate wMaxPacketValue entries in endpoint descriptors") Cc: stable Acked-by: Alan Stern Signed-off-by: Pavel Hofman Link: https://lore.kernel.org/r/20211210085219.16796-1-pavel.hofman@ivitera.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/config.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/usb/core/config.c +++ b/drivers/usb/core/config.c @@ -406,7 +406,7 @@ static int usb_parse_endpoint(struct dev * the USB-2 spec requires such endpoints to have wMaxPacketSize = 0 * (see the end of section 5.6.3), so don't warn about them. */ - maxp = usb_endpoint_maxp(&endpoint->desc); + maxp = le16_to_cpu(endpoint->desc.wMaxPacketSize); if (maxp == 0 && !(usb_endpoint_xfer_isoc(d) && asnum == 0)) { dev_warn(ddev, "config %d interface %d altsetting %d endpoint 0x%X has invalid wMaxPacketSize 0\n", cfgno, inum, asnum, d->bEndpointAddress);