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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A9607C433EF for ; Mon, 13 Jun 2022 13:07:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1358679AbiFMNHV (ORCPT ); Mon, 13 Jun 2022 09:07:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49718 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349811AbiFMMzb (ORCPT ); Mon, 13 Jun 2022 08:55:31 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10A37E0D2; Mon, 13 Jun 2022 04:16:10 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id AA754B80D31; Mon, 13 Jun 2022 11:16:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 07A97C3411E; Mon, 13 Jun 2022 11:16:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1655118967; bh=jqlb9j3DcrFhiYXFuaDgQsMjUk2qrafWbbb6XbIC7vk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oCoD4I6LtmpaJDVbz+aNVsz0zdE+j30vLMbWza3Y+8fI1JbrwA1kHgUbWZJUByFlA ZWrbmV8dBWQ9S2av2qnB8Cdu61pi4E+NSunOk+HBbwtH86nysSa6PLJjagYsNNtFaS vFOtCDyvd6B0QEOudcwsYspHyvN7/d8AoJnA57TM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Leon Romanovsky , Saeed Mahameed , Sasha Levin Subject: [PATCH 5.15 093/247] net/mlx5: Dont use already freed action pointer Date: Mon, 13 Jun 2022 12:09:55 +0200 Message-Id: <20220613094925.778304735@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220613094922.843438024@linuxfoundation.org> References: <20220613094922.843438024@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: Leon Romanovsky [ Upstream commit 80b2bd737d0e833e6a2b77e482e5a714a79c86a4 ] The call to mlx5dr_action_destroy() releases "action" memory. That pointer is set to miss_action later and generates the following smatch error: drivers/net/ethernet/mellanox/mlx5/core/steering/fs_dr.c:53 set_miss_action() warn: 'action' was already freed. Make sure that the pointer is always valid by setting NULL after destroy. Fixes: 6a48faeeca10 ("net/mlx5: Add direct rule fs_cmd implementation") Reported-by: Dan Carpenter Signed-off-by: Leon Romanovsky Signed-off-by: Saeed Mahameed Signed-off-by: Sasha Levin --- drivers/net/ethernet/mellanox/mlx5/core/steering/fs_dr.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/fs_dr.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/fs_dr.c index ae4597118f8b..0553ee1fe80a 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/steering/fs_dr.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/fs_dr.c @@ -43,11 +43,10 @@ static int set_miss_action(struct mlx5_flow_root_namespace *ns, err = mlx5dr_table_set_miss_action(ft->fs_dr_table.dr_table, action); if (err && action) { err = mlx5dr_action_destroy(action); - if (err) { - action = NULL; - mlx5_core_err(ns->dev, "Failed to destroy action (%d)\n", - err); - } + if (err) + mlx5_core_err(ns->dev, + "Failed to destroy action (%d)\n", err); + action = NULL; } ft->fs_dr_table.miss_action = action; if (old_miss_action) { -- 2.35.1