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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 AA52FC433FE for ; Fri, 10 Sep 2021 00:42:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 94D2561108 for ; Fri, 10 Sep 2021 00:42:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241333AbhIJAoB (ORCPT ); Thu, 9 Sep 2021 20:44:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:45964 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233285AbhIJATo (ORCPT ); Thu, 9 Sep 2021 20:19:44 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 63F62610A3; Fri, 10 Sep 2021 00:18:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631233114; bh=jrYfTcMRemDgUOMZ625TC1DiMS2P/XHo05XSHtljRuY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uG/lXR7EJJuFXBV6+ncEO2mff/dgZ7kKf2bcF2rNwfplrJ4gxFZNL0sm+WVFyRLw4 e1tRInmyFqM4+ThbAUGYY/gDwSqAukUR81Flk9QwRlSioy0S/7pIep+m3duNzpRsSw vY8nENkYMUIMAGdfI/Fyc/bn/05QYTrenm/K4ZAg+5Bx5EG9QIWYs/Okj0vncaqh6l +0EOUq9zXqRC5NpM+lwmqfpLzfRmZfwxjvbm4veewgN9AMSrA1kQMxWpTRmo2PigJe jnmS525QmhkGNwuBj5rHIAeuxUKepOL95004y3PAXhQmcXTEXdOeyOclE3uwT07wXd VkIKyPzhvGVnQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: James Smart , Justin Tee , "Martin K . Petersen" , Sasha Levin , linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 5.13 09/88] scsi: lpfc: Fix NULL ptr dereference with NPIV ports for RDF handling Date: Thu, 9 Sep 2021 20:17:01 -0400 Message-Id: <20210910001820.174272-9-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210910001820.174272-1-sashal@kernel.org> References: <20210910001820.174272-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: James Smart [ Upstream commit 2d338eb55b14ab9d245e8b1d982adecca8c4c613 ] RDF ELS handling for NPIV ports may result in an incorrect NDLP reference count. In the event of a persistent link down, this may lead to premature release of an NDLP structure and subsequent NULL ptr dereference panic. Remove extraneous lpfc_nlp_put() call in NPIV port RDF processing. Link: https://lore.kernel.org/r/20210707184351.67872-9-jsmart2021@gmail.com Co-developed-by: Justin Tee Signed-off-by: Justin Tee Signed-off-by: James Smart Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/lpfc/lpfc_els.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index 933927f738c7..6e7b81184db3 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -3267,7 +3267,6 @@ lpfc_issue_els_scr(struct lpfc_vport *vport, uint8_t retry) return 1; } - /* Keep the ndlp just in case RDF is being sent */ return 0; } @@ -3511,11 +3510,9 @@ lpfc_issue_els_rdf(struct lpfc_vport *vport, uint8_t retry) lpfc_enqueue_node(vport, ndlp); } - /* RDF ELS is not required on an NPIV VN_Port. */ - if (vport->port_type == LPFC_NPIV_PORT) { - lpfc_nlp_put(ndlp); + /* RDF ELS is not required on an NPIV VN_Port. */ + if (vport->port_type == LPFC_NPIV_PORT) return -EACCES; - } elsiocb = lpfc_prep_els_iocb(vport, 1, cmdsize, retry, ndlp, ndlp->nlp_DID, ELS_CMD_RDF); -- 2.30.2