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=-19.2 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,MIME_NO_TEXT, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 55F7CC63777 for ; Mon, 30 Nov 2020 18:13:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E6E6F20789 for ; Mon, 30 Nov 2020 18:13:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="WqZ4m55v" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387716AbgK3SNR (ORCPT ); Mon, 30 Nov 2020 13:13:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54410 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387597AbgK3SNQ (ORCPT ); Mon, 30 Nov 2020 13:13:16 -0500 Received: from mail-pj1-x1043.google.com (mail-pj1-x1043.google.com [IPv6:2607:f8b0:4864:20::1043]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 99B5EC0617A7 for ; Mon, 30 Nov 2020 10:12:36 -0800 (PST) Received: by mail-pj1-x1043.google.com with SMTP id r20so74239pjp.1 for ; Mon, 30 Nov 2020 10:12:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:mime-version; bh=yxugyMapKnCd5bRyho1VdAOJXSBFacrdvT2LPbuk5rg=; b=WqZ4m55vv7yxYxVEWMHi6l13V9dDqyP3Mf/d2erBOmdOqY/B0O1Lezg+wUUt3LvBJd lxALisH3R6sAdq380C0rZ5Br2icPxW1bPCWLUPzv8rXaSDyb62smZmW+u47Twql5LVX5 g/pSj69HjmS3yHItNqQnSdLs3zUMj9GJ9FVww= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version; bh=yxugyMapKnCd5bRyho1VdAOJXSBFacrdvT2LPbuk5rg=; b=RkoLTHA/xmTESgXRiIcd/5OjCQhIUKA3BCVSJyq2eSC3D0TkuQF+SMTHFhyYf/+flL iWdwsRrt8qxYe/IcQZEAD4DlLxnGknywrWDr5lFFPbvnq5kgsQvKkxCvGNf6+Z7nOuWI QD2d+ZP2VTKsZ+bjaRQ2kJaqrzqZVSq0C+/FjWGDyeTJwgNscm7E59Lg46Ke1AY/yqO9 wscu4MNPCRx8kfJMu9Ko1LfLOGVht7GJTI3xGHoiRL00fQyqGVSL9+SAt+8hfrmGVPVt qyyDtzMh0uSzo4U/NFs3Xdx7bmclPyjbcyYoGkb7FvKW2rDe8/vLelGycxIKMHRGrCSK dSow== X-Gm-Message-State: AOAM531z6jw77mUIZ9WQOTWkaeiYXBJBiuXaqzEBi6KFGGX3Njbcjzo+ 7pxE3QkuwZchJuI6EOgn3aZ64yz1eGAF131qDGc3ePmQ8lr1ob0videxWmDsm+Mb4xo7YeI76X6 AOsDFI8NeOIuSDp4T/L3idelN0bteaQ0DwbhPFOtdJ3V5gqTaORr85ADJRDD+o5SVAKBXGgXCXH jquGg= X-Google-Smtp-Source: ABdhPJyYhJ0eSrJZUu85HqDToAdwfiG4tOuPf0xFZVpEY/hKNHLHDEPG0N6loPFY5DIu3pUkDWME7A== X-Received: by 2002:a17:90b:4d0e:: with SMTP id mw14mr78245pjb.92.1606759955397; Mon, 30 Nov 2020 10:12:35 -0800 (PST) Received: from localhost.localdomain ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id gz2sm88940pjb.2.2020.11.30.10.12.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Nov 2020 10:12:34 -0800 (PST) From: James Smart To: linux-scsi@vger.kernel.org Cc: James Smart , Dan Carpenter Subject: [PATCH] lpfc: Correct null ndlp reference on routine exit Date: Mon, 30 Nov 2020 10:12:26 -0800 Message-Id: <20201130181226.16675-1-james.smart@broadcom.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000006b88b005b556f4db" Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org --0000000000006b88b005b556f4db Content-Transfer-Encoding: 8bit smatch correctly called out a logic error with accessing a pointer after checking it for null. drivers/scsi/lpfc/lpfc_els.c:2043 lpfc_cmpl_els_plogi() error: we previously assumed 'ndlp' could be null (see line 1942) Adjust the exit point to avoid the trace printf ndlp reference. A trace entry was already generated when the ndlp was checked for null. Fixes: 4430f7fd09ec ("scsi: lpfc: Rework locations of ndlp reference taking") Signed-off-by: James Smart Reported-by: Dan Carpenter --- drivers/scsi/lpfc/lpfc_els.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index fd5c581cd67a..96c087b8b474 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -1946,7 +1946,7 @@ lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb, irsp->un.elsreq64.remoteID, irsp->ulpStatus, irsp->un.ulpWord[4], irsp->ulpIoTag); - goto out; + goto out_freeiocb; } /* Since ndlp can be freed in the disc state machine, note if this node @@ -2042,6 +2042,7 @@ lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb, "PLOGI Cmpl PUT: did:x%x refcnt %d", ndlp->nlp_DID, kref_read(&ndlp->kref), 0); +out_freeiocb: /* Release the reference on the original I/O request. */ free_ndlp = (struct lpfc_nodelist *)cmdiocb->context1; -- 2.26.2 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