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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 EF42BC2BA83 for ; Thu, 13 Feb 2020 15:43:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B790C20675 for ; Thu, 13 Feb 2020 15:43:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581608627; bh=KHdrEN3OtqPPD6L5YgBi2g1IZzGbO2eK07lEomwDnVc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ffhE64hnZtQXom6dkcVMqBkLCrcjujQgBbda03+NrdCM+J4fqY7Su92ELApujbOLv LU4+Z3aGQ8lqq/nnh9FbgiCIotPwhnxEwffRmjnwqI6zmi9GLNCd9WYKiy5A23FDJD kKsN+qH9SIw9wb0hAID0tpn8S/5fuxcGiS1Lc4Bg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729624AbgBMPnq (ORCPT ); Thu, 13 Feb 2020 10:43:46 -0500 Received: from mail.kernel.org ([198.145.29.99]:52904 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387713AbgBMP1u (ORCPT ); Thu, 13 Feb 2020 10:27:50 -0500 Received: from localhost (unknown [104.132.1.104]) (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 091142168B; Thu, 13 Feb 2020 15:27:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581607670; bh=KHdrEN3OtqPPD6L5YgBi2g1IZzGbO2eK07lEomwDnVc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ydVFCx5DXBM/BDNZYAO5PSX+5HOoenuOT4J5GjJIhNZIYTptLGnZosHacEsAO6b7P akX0pt1tgHZ3MNOW432yE9jCCEskSSpOWRSKH3l8lyTtKsJKLae1fXtKZ/sa/UfyHI 87W42Tc04JpYiGhNQ/XnPLB7gN9wEnMKZDFVWcjU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Qing Xu , Kalle Valo , Sasha Levin Subject: [PATCH 5.4 93/96] mwifiex: Fix possible buffer overflows in mwifiex_ret_wmm_get_status() Date: Thu, 13 Feb 2020 07:21:40 -0800 Message-Id: <20200213151913.789751119@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200213151839.156309910@linuxfoundation.org> References: <20200213151839.156309910@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: Qing Xu [ Upstream commit 3a9b153c5591548612c3955c9600a98150c81875 ] mwifiex_ret_wmm_get_status() calls memcpy() without checking the destination size.Since the source is given from remote AP which contains illegal wmm elements , this may trigger a heap buffer overflow. Fix it by putting the length check before calling memcpy(). Signed-off-by: Qing Xu Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin --- drivers/net/wireless/marvell/mwifiex/wmm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/wireless/marvell/mwifiex/wmm.c b/drivers/net/wireless/marvell/mwifiex/wmm.c index 41f0231376c01..132f9e8ed68c1 100644 --- a/drivers/net/wireless/marvell/mwifiex/wmm.c +++ b/drivers/net/wireless/marvell/mwifiex/wmm.c @@ -970,6 +970,10 @@ int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv, "WMM Parameter Set Count: %d\n", wmm_param_ie->qos_info_bitmap & mask); + if (wmm_param_ie->vend_hdr.len + 2 > + sizeof(struct ieee_types_wmm_parameter)) + break; + memcpy((u8 *) &priv->curr_bss_params.bss_descriptor. wmm_ie, wmm_param_ie, wmm_param_ie->vend_hdr.len + 2); -- 2.20.1