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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,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 1697EC43381 for ; Mon, 25 Feb 2019 21:37:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CFE9120578 for ; Mon, 25 Feb 2019 21:37:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551130669; bh=r5jvxL4GdKv+JM0pUZrunkxB6IaCk+7uURrU/1h1eoA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=JvIrgxZOEJrH5ethMV8OhvzQHExqdqnKxt71+0LCoJbNv+pc7o8qXkLK6fmGs3WqE cDqflIFaMJKyf9gnw4Tq5Hqrj73EZdotad2j67TSKMhKvmj4Aw5ss6LvVJFUz3xxjc ZO8Zhw1Vc89drixs+BDFXBTLg/O+emrxNCa7dEoU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733247AbfBYVhs (ORCPT ); Mon, 25 Feb 2019 16:37:48 -0500 Received: from mail.kernel.org ([198.145.29.99]:44782 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727616AbfBYVhk (ORCPT ); Mon, 25 Feb 2019 16:37:40 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 3892920578; Mon, 25 Feb 2019 21:37:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551130659; bh=r5jvxL4GdKv+JM0pUZrunkxB6IaCk+7uURrU/1h1eoA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nmptiPQwtbKf4bNlLxqX1efJENAKsnYZdLgB3wONB2DN0U+UR/JhIon6/LcP+WTRn JHohTKsRm5QdcRRuLfivJ/LUXrj0LGB8W9TX882upKlFEmifytGD2CNBux+aG5P+rK nNVqw4G6oQBSyFFAigWvSJW+8QLRGryMGRQiBVjI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Pablo Neira Ayuso Subject: [PATCH 4.20 179/183] netfilter: nft_compat: use-after-free when deleting targets Date: Mon, 25 Feb 2019 22:12:32 +0100 Message-Id: <20190225195125.306063658@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190225195054.748060397@linuxfoundation.org> References: <20190225195054.748060397@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore 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 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pablo Neira Ayuso commit 753c111f655e38bbd52fc01321266633f022ebe2 upstream. Fetch pointer to module before target object is released. Fixes: 29e3880109e3 ("netfilter: nf_tables: fix use-after-free when deleting compat expressions") Fixes: 0ca743a55991 ("netfilter: nf_tables: add compatibility layer for x_tables") Signed-off-by: Pablo Neira Ayuso Signed-off-by: Greg Kroah-Hartman --- net/netfilter/nft_compat.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/net/netfilter/nft_compat.c +++ b/net/netfilter/nft_compat.c @@ -282,6 +282,7 @@ nft_target_destroy(const struct nft_ctx { struct xt_target *target = expr->ops->data; void *info = nft_expr_priv(expr); + struct module *me = target->me; struct xt_tgdtor_param par; par.net = ctx->net; @@ -292,7 +293,7 @@ nft_target_destroy(const struct nft_ctx par.target->destroy(&par); if (nft_xt_put(container_of(expr->ops, struct nft_xt, ops))) - module_put(target->me); + module_put(me); } static int nft_extension_dump_info(struct sk_buff *skb, int attr,