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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,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 9B8DDC43381 for ; Fri, 15 Jan 2021 13:00:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 74FD52313E for ; Fri, 15 Jan 2021 13:00:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388111AbhAONAe (ORCPT ); Fri, 15 Jan 2021 08:00:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:39938 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733106AbhAOMdR (ORCPT ); Fri, 15 Jan 2021 07:33:17 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id E2D56238E3; Fri, 15 Jan 2021 12:33:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1610713982; bh=PJzgqFqKZVgFLlgeDp7lTZbFkIcGuHXKZypxC+ix11k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GVKN2VkSayjor7AKv3ESVoT/mLbJL4nk6mEsmh+/Lp+myPz8BKyxr23nCjT819ZcD rAhWmKpvHecDRQ5aZWWGHJ13tdfAsgCFtZQ8G1VCakszYFIvzU+hrWYEOHe6S9hWVT RldEZtYun4aV8v3DlLzh+dKmuVaImGI7edpic1to= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dinghao Liu , Leon Romanovsky , Saeed Mahameed Subject: [PATCH 4.19 37/43] net/mlx5e: Fix two double free cases Date: Fri, 15 Jan 2021 13:28:07 +0100 Message-Id: <20210115121958.840039375@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210115121957.037407908@linuxfoundation.org> References: <20210115121957.037407908@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dinghao Liu commit 7a6eb072a9548492ead086f3e820e9aac71c7138 upstream. mlx5e_create_ttc_table_groups() frees ft->g on failure of kvzalloc(), but such failure will be caught by its caller in mlx5e_create_ttc_table() and ft->g will be freed again in mlx5e_destroy_flow_table(). The same issue also occurs in mlx5e_create_ttc_table_groups(). Set ft->g to NULL after kfree() to avoid double free. Fixes: 7b3722fa9ef6 ("net/mlx5e: Support RSS for GRE tunneled packets") Fixes: 33cfaaa8f36f ("net/mlx5e: Split the main flow steering table") Signed-off-by: Dinghao Liu Reviewed-by: Leon Romanovsky Signed-off-by: Saeed Mahameed Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/mellanox/mlx5/core/en_fs.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_fs.c @@ -893,6 +893,7 @@ static int mlx5e_create_ttc_table_groups in = kvzalloc(inlen, GFP_KERNEL); if (!in) { kfree(ft->g); + ft->g = NULL; return -ENOMEM; } @@ -1033,6 +1034,7 @@ static int mlx5e_create_inner_ttc_table_ in = kvzalloc(inlen, GFP_KERNEL); if (!in) { kfree(ft->g); + ft->g = NULL; return -ENOMEM; }