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 C13D2C52D31 for ; Thu, 27 Feb 2020 14:00:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 87E9B2073D for ; Thu, 27 Feb 2020 14:00:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582812026; bh=tqXNySAPNmZuyfwbHmmxm2ECeTdG1X/DKP6NQ6yJImI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Asp5hjuunZKHTOr7ySPKFs6UY/0lHCvEaps8+xHr+tN6/NyOEmJSsBL6SJyz4gsnQ vimQrzy7X2HOPvewhV99Qp5OxTj+ux7iaa7BuRQh0mC8OF4tem3hsHeSGxOnCHY3EH U+cFDZos0ORAZ1YqT3DlPezzwopVlDw2IBY/P2kw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728963AbgB0OAY (ORCPT ); Thu, 27 Feb 2020 09:00:24 -0500 Received: from mail.kernel.org ([198.145.29.99]:33650 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732702AbgB0OAT (ORCPT ); Thu, 27 Feb 2020 09:00:19 -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 E0B2420578; Thu, 27 Feb 2020 14:00:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582812018; bh=tqXNySAPNmZuyfwbHmmxm2ECeTdG1X/DKP6NQ6yJImI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mozcLVdGZNgcpPCfjCz78+9SiBTJ8QcFjSQ5Q5XWusyFxbFpqtFg7Er4rSB/MLE4S E71n5f28s79SQ7c9MHj+SBwFa6aVHVD+6q5YRiMnnTNvO5pY5vRfqMzxR9pJLJNRbX iG518DHLYyV60DtnGn8X5aFRFBiGmBNHjWiDTsyg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pietro Oliva , Larry Finger Subject: [PATCH 4.14 189/237] staging: rtl8723bs: Fix potential security hole Date: Thu, 27 Feb 2020 14:36:43 +0100 Message-Id: <20200227132310.232973405@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200227132255.285644406@linuxfoundation.org> References: <20200227132255.285644406@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 ac33597c0c0d1d819dccfe001bcd0acef7107e7c 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 554c0a3abf216 ("0taging: Add rtl8723bs sdio wifi driver"). Reported by: Pietro Oliva Cc: Pietro Oliva Cc: Stable Fixes 554c0a3abf216 ("0taging: Add rtl8723bs sdio wifi driver"). Signed-off-by: Larry Finger Link: https://lore.kernel.org/r/20200210180235.21691-3-Larry.Finger@lwfinger.net Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rtl8723bs/os_dep/ioctl_linux.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c +++ b/drivers/staging/rtl8723bs/os_dep/ioctl_linux.c @@ -4340,7 +4340,7 @@ static int rtw_hostapd_ioctl(struct net_ /* if (p->length < sizeof(struct ieee_param) || !p->pointer) { */ - if (!p->pointer) { + if (!p->pointer || p->length != sizeof(*param)) { ret = -EINVAL; goto out; }