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=-6.9 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,URIBL_BLOCKED,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 7EB99CA90AF for ; Wed, 13 May 2020 10:03:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4CBF820575 for ; Wed, 13 May 2020 10:03:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589364203; bh=x6W/Pxf4cTQTlMo1ktdLzg2nMjER+L4G8RuHBtd4C3E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=awiRuXZdzH93CLm/f8/vZysA1bxINYMl9D5JyrquTCIHf4oL+0xCBbz5gcl7yop8w tO2G99ntXrqxSaq5xKg6A7WYdlJHYZGE/IHfgnvK6HUfHewn/RpxOwu6CSAQMlirbW 09Sr7bIm1tSzdFafY7mLexcNf8oLG6xSi/GZ6c1o= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388570AbgEMKDW (ORCPT ); Wed, 13 May 2020 06:03:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:48012 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733189AbgEMJtL (ORCPT ); Wed, 13 May 2020 05:49:11 -0400 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 58D8720740; Wed, 13 May 2020 09:49:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589363350; bh=x6W/Pxf4cTQTlMo1ktdLzg2nMjER+L4G8RuHBtd4C3E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r84pG1olKwpQTJw8MQWKLQovAx3enYVMYtZrP22LIybvMFhgtuv5BHvOGkZbZNjcz 1ghXjwm9CJcfYrPSK8/gu/Fzs6bU/Q51HDFuZ+eqb1M6XhfTYaMDEIE2Or/75XkuZg SPT41yBJJ92leD767uswHIA3pvZ7XbFq7ngU41pA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Moshe Shemesh , Eran Ben Elisha , Saeed Mahameed Subject: [PATCH 5.4 37/90] net/mlx5: Fix forced completion access non initialized command entry Date: Wed, 13 May 2020 11:44:33 +0200 Message-Id: <20200513094412.490041589@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200513094408.810028856@linuxfoundation.org> References: <20200513094408.810028856@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: Moshe Shemesh [ Upstream commit f3cb3cebe26ed4c8036adbd9448b372129d3c371 ] mlx5_cmd_flush() will trigger forced completions to all valid command entries. Triggered by an asynch event such as fast teardown it can happen at any stage of the command, including command initialization. It will trigger forced completion and that can lead to completion on an uninitialized command entry. Setting MLX5_CMD_ENT_STATE_PENDING_COMP only after command entry is initialized will ensure force completion is treated only if command entry is initialized. Fixes: 73dd3a4839c1 ("net/mlx5: Avoid using pending command interface slots") Signed-off-by: Moshe Shemesh Signed-off-by: Eran Ben Elisha Signed-off-by: Saeed Mahameed Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c @@ -888,7 +888,6 @@ static void cmd_work_handler(struct work } cmd->ent_arr[ent->idx] = ent; - set_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, &ent->state); lay = get_inst(cmd, ent->idx); ent->lay = lay; memset(lay, 0, sizeof(*lay)); @@ -910,6 +909,7 @@ static void cmd_work_handler(struct work if (ent->callback) schedule_delayed_work(&ent->cb_timeout_work, cb_timeout); + set_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, &ent->state); /* Skip sending command to fw if internal error */ if (pci_channel_offline(dev->pdev) ||