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 D0C6CC35E1D for ; Thu, 27 Feb 2020 14:14:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9C49420578 for ; Thu, 27 Feb 2020 14:14:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582812874; bh=BSZfzcC3rom+TwcE0ATPv7pVKjZ/+GbA95PHOYnmggU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=oB69gLsaonYaBdVOUWBfv7nV9h70Ytjt4oD9alDBPgiLoFZr0g9GcuccZPC4wKqTK AuKlV2dLeDJjGHh5/kFMLPqnbHv9meK0xsqvb28E0GBJjvx8bBiozg4a5Hg/0lPanu TB+MNSxpcNjjYkXl7hdrUY6I2/TFa4DjrkO28V+U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389147AbgB0OOd (ORCPT ); Thu, 27 Feb 2020 09:14:33 -0500 Received: from mail.kernel.org ([198.145.29.99]:53750 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389127AbgB0OO2 (ORCPT ); Thu, 27 Feb 2020 09:14:28 -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 BD0BF24690; Thu, 27 Feb 2020 14:14:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582812867; bh=BSZfzcC3rom+TwcE0ATPv7pVKjZ/+GbA95PHOYnmggU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DoBt9vuz6qsky1AKtsTmiXF1dysjxX59zckYg657rJNgjxIyeBDJfivMW+wrRy9Di MuEdE6K6nmLojgk9Rptah5d+qRnzMISqeYFE1G7kvmTGEEhPl8scmkChceJecNzI9p 6xUKjV3RiDFCNSjR2iBZmFmpAy1rzibSV8bqTw9U= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pietro Oliva , Larry Finger Subject: [PATCH 5.5 046/150] staging: rtl8188eu: Fix potential overuse of kernel memory Date: Thu, 27 Feb 2020 14:36:23 +0100 Message-Id: <20200227132239.805446322@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200227132232.815448360@linuxfoundation.org> References: <20200227132232.815448360@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: Larry Finger commit 4ddf8ab8d15ddbc52eefb44eb64e38466ce1f70f upstream. In routine wpa_supplicant_ioctl(), the user-controlled p->length is checked to be at least the size of struct ieee_param size, but the code does not detect the case where p->length is greater than the size of the struct, thus a malicious user could be wasting kernel memory. Fixes commit a2c60d42d97c ("Add files for new driver - part 16"). Reported by: Pietro Oliva Cc: Pietro Oliva Cc: Stable Fixes commit a2c60d42d97c ("Add files for new driver - part 16"). Signed-off-by: Larry Finger Link: https://lore.kernel.org/r/20200210180235.21691-4-Larry.Finger@lwfinger.net Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rtl8188eu/os_dep/ioctl_linux.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/staging/rtl8188eu/os_dep/ioctl_linux.c +++ b/drivers/staging/rtl8188eu/os_dep/ioctl_linux.c @@ -2011,7 +2011,7 @@ static int wpa_supplicant_ioctl(struct n struct ieee_param *param; uint ret = 0; - if (p->length < sizeof(struct ieee_param) || !p->pointer) { + if (!p->pointer || p->length != sizeof(struct ieee_param)) { ret = -EINVAL; goto out; }