From patchwork Thu May 20 09:22:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 444388 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 39139C433ED for ; Thu, 20 May 2021 10:09:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1C5B26194F for ; Thu, 20 May 2021 10:09:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235422AbhETKK4 (ORCPT ); Thu, 20 May 2021 06:10:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:42286 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235826AbhETKJ1 (ORCPT ); Thu, 20 May 2021 06:09:27 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E153061954; Thu, 20 May 2021 09:42:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621503749; bh=Kj4HbNKnJggx//K0o2PWTc0JJc/yOjHg4wctrBeg3yE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Mvg0NaCrHehyZFsrO5pUGRrqrtDp8AMh93hIviaCMYZ9ZOYhG6nwO7h5a8chg80yM gtckJouEQb3oDB6fJv1kujdA1l4As3XtwwLhmeTyk6hRevg2MSQ1LGd4NWr2y9LXtN BRbqtIKBHLTF/Qv0pIPvL7lbkO37uN+oaYZ0t4rc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yunjian Wang , Tony Nguyen , Sasha Levin Subject: [PATCH 4.19 361/425] i40e: Fix use-after-free in i40e_client_subtask() Date: Thu, 20 May 2021 11:22:10 +0200 Message-Id: <20210520092143.268323885@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092131.308959589@linuxfoundation.org> References: <20210520092131.308959589@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Yunjian Wang [ Upstream commit 38318f23a7ef86a8b1862e5e8078c4de121960c3 ] Currently the call to i40e_client_del_instance frees the object pf->cinst, however pf->cinst->lan_info is being accessed after the free. Fix this by adding the missing return. Addresses-Coverity: ("Read from pointer after free") Fixes: 7b0b1a6d0ac9 ("i40e: Disable iWARP VSI PETCP_ENA flag on netdev down events") Signed-off-by: Yunjian Wang Signed-off-by: Tony Nguyen Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/i40e/i40e_client.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/intel/i40e/i40e_client.c b/drivers/net/ethernet/intel/i40e/i40e_client.c index 5f3b8b9ff511..c1832a848714 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_client.c +++ b/drivers/net/ethernet/intel/i40e/i40e_client.c @@ -377,6 +377,7 @@ void i40e_client_subtask(struct i40e_pf *pf) clear_bit(__I40E_CLIENT_INSTANCE_OPENED, &cdev->state); i40e_client_del_instance(pf); + return; } } }