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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,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 619EAC43603 for ; Wed, 11 Dec 2019 16:04:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 37B6E2077B for ; Wed, 11 Dec 2019 16:04:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576080297; bh=BRHJ8Y1OF2lR3NJEHm4qduil6xTPTcnYmBsxmtpUhLw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=NvodMYEVvkzS2P0Htap4nYBkmryLecKZnUqpJ7WgcZ/S2hd2vLlwtCPFWmMyfZdnE N279QvX1TAT0gNQBFbGbxgrKsb3JOeht+RxwfFjK93/8kHTgy0lh5Dz4haRQqF6EOO fEdpAzL9FkTQqN9cwtWvxA8Mb/a/al9Txj3fI2YI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388875AbfLKQEz (ORCPT ); Wed, 11 Dec 2019 11:04:55 -0500 Received: from mail.kernel.org ([198.145.29.99]:35580 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731273AbfLKPM5 (ORCPT ); Wed, 11 Dec 2019 10:12:57 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0D31624681; Wed, 11 Dec 2019 15:12:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576077177; bh=BRHJ8Y1OF2lR3NJEHm4qduil6xTPTcnYmBsxmtpUhLw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HkIxf7kKK8jRcBNdMVzKEHf4Wg3UzKrkrIPXHqtTAafiPopWpeQJBq19Lp+wGm3F6 yeAs+lvTsLUPlibl9gNw74HnJJMXODQpkpz+5sRjQ45h5MLFeW+dhGGpx3+lZ4ZQBK M/xb91G5v7d24PEWNo+xZPRx++hCcxwSKGe5CkKk= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: James Smart , coverity-bot , James Bottomley , "Gustavo A. R. Silva" , linux-next@vger.kernel.org, "Ewan D . Milne" , Dick Kennedy , "Martin K . Petersen" , Sasha Levin , linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 061/134] scsi: lpfc: fix: Coverity: lpfc_cmpl_els_rsp(): Null pointer dereferences Date: Wed, 11 Dec 2019 10:10:37 -0500 Message-Id: <20191211151150.19073-61-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191211151150.19073-1-sashal@kernel.org> References: <20191211151150.19073-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: James Smart [ Upstream commit 6c6d59e0fe5b86cf273d6d744a6a9768c4ecc756 ] Coverity reported the following: *** CID 101747: Null pointer dereferences (FORWARD_NULL) /drivers/scsi/lpfc/lpfc_els.c: 4439 in lpfc_cmpl_els_rsp() 4433 kfree(mp); 4434 } 4435 mempool_free(mbox, phba->mbox_mem_pool); 4436 } 4437 out: 4438 if (ndlp && NLP_CHK_NODE_ACT(ndlp)) { vvv CID 101747: Null pointer dereferences (FORWARD_NULL) vvv Dereferencing null pointer "shost". 4439 spin_lock_irq(shost->host_lock); 4440 ndlp->nlp_flag &= ~(NLP_ACC_REGLOGIN | NLP_RM_DFLT_RPI); 4441 spin_unlock_irq(shost->host_lock); 4442 4443 /* If the node is not being used by another discovery thread, 4444 * and we are sending a reject, we are done with it. Fix by adding a check for non-null shost in line 4438. The scenario when shost is set to null is when ndlp is null. As such, the ndlp check present was sufficient. But better safe than sorry so add the shost check. Reported-by: coverity-bot Addresses-Coverity-ID: 101747 ("Null pointer dereferences") Fixes: 2e0fef85e098 ("[SCSI] lpfc: NPIV: split ports") CC: James Bottomley CC: "Gustavo A. R. Silva" CC: linux-next@vger.kernel.org Link: https://lore.kernel.org/r/20191111230401.12958-3-jsmart2021@gmail.com Reviewed-by: Ewan D. Milne Signed-off-by: Dick Kennedy Signed-off-by: James Smart Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/lpfc/lpfc_els.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index 4794a58deaf3c..66f8867dd8377 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -4440,7 +4440,7 @@ lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb, mempool_free(mbox, phba->mbox_mem_pool); } out: - if (ndlp && NLP_CHK_NODE_ACT(ndlp)) { + if (ndlp && NLP_CHK_NODE_ACT(ndlp) && shost) { spin_lock_irq(shost->host_lock); ndlp->nlp_flag &= ~(NLP_ACC_REGLOGIN | NLP_RM_DFLT_RPI); spin_unlock_irq(shost->host_lock); -- 2.20.1