From patchwork Thu Feb 27 13:36:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 230396 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 4159EC11D3D for ; Thu, 27 Feb 2020 14:14:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 08EDA24691 for ; Thu, 27 Feb 2020 14:14:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582812867; bh=JdRXDqZBkHKSRUEHPHeTiZ0rgHvb/ZVX7aWHKNc0Dks=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=RXN6PFWitxCuM8ubfuTRlPGXRGjJdqFv665JUALQ7nMyixVwzov/gvyh6GHMbTD8l ZZj6zgkfPs3IslEQNpXFKwc5QIcFuCYXk6hZPssjb7ZUHksfAOHSqCuk+t075JrnTW 6kqOiW89qY208DJUaqiBA3qZY3frHqbfxxOIUyDM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389123AbgB0OOZ (ORCPT ); Thu, 27 Feb 2020 09:14:25 -0500 Received: from mail.kernel.org ([198.145.29.99]:53674 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388761AbgB0OOZ (ORCPT ); Thu, 27 Feb 2020 09:14:25 -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 4ED6224691; Thu, 27 Feb 2020 14:14:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582812864; bh=JdRXDqZBkHKSRUEHPHeTiZ0rgHvb/ZVX7aWHKNc0Dks=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q8RDeS0V69H5w1lqjRNWPrLq35jziXb/x+UDnn/C76XwlpJzdetbxSEPm/C8tzkl9 bnPP9xTYemaRoROKcMCb3G45bkR2q803QMCyEx5H0idg8rFOjr27WAqN/BCERHR1q5 YWJE3tFe2rIygTuxvH+DkiEhZLKGCDO+411hR2h0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pietro Oliva , Larry Finger Subject: [PATCH 5.5 045/150] staging: rtl8188eu: Fix potential security hole Date: Thu, 27 Feb 2020 14:36:22 +0100 Message-Id: <20200227132239.646778367@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 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Larry Finger commit 499c405b2b80bb3a04425ba3541d20305e014d3e upstream. In routine rtw_hostapd_ioctl(), the user-controlled p->length is assumed to be at least the size of struct ieee_param size, but this assumption is never checked. This could result in out-of-bounds read/write on kernel heap in case a p->length less than the size of struct ieee_param is specified by the user. If p->length is allowed to be greater than the size of the struct, then 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: a2c60d42d97c ("staging: r8188eu: Add files for new driver - part 16") Signed-off-by: Larry Finger Link: https://lore.kernel.org/r/20200210180235.21691-2-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 @@ -2798,7 +2798,7 @@ static int rtw_hostapd_ioctl(struct net_ goto out; } - if (!p->pointer) { + if (!p->pointer || p->length != sizeof(struct ieee_param)) { ret = -EINVAL; goto out; }