From patchwork Sat Jul 31 07:51:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tuo Li X-Patchwork-Id: 12412357 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 78538C4338F for ; Sat, 31 Jul 2021 07:52:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 582E56101C for ; Sat, 31 Jul 2021 07:52:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232426AbhGaHwM (ORCPT ); Sat, 31 Jul 2021 03:52:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42032 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230338AbhGaHwL (ORCPT ); Sat, 31 Jul 2021 03:52:11 -0400 Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 227FBC06175F; Sat, 31 Jul 2021 00:52:05 -0700 (PDT) Received: by mail-pj1-x1036.google.com with SMTP id a4-20020a17090aa504b0290176a0d2b67aso24160852pjq.2; Sat, 31 Jul 2021 00:52:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=LNinOfUJINPcfdOxhYvsgsalnU1GKLpLDBpG0mAohAc=; b=TL/nDTwV7Ph7kC1oZk66wjgapAmGIuuvxKdZnyb2id6PMHXk3i4RURbvV6vN+GabZ0 5nKC4XMdjCnAQdmdM1bcAxlR9PIybYesEm8AYOmglzQijYZkBb2VyLlLvLH9yYsbTsxK 0yYvZVJMCN63zzu8VGgeKdHRVKCL470JVoFALEkpn7OJZaMW/ahykXkU4zwNGT5k8Tv0 6/S0ja07q4MoAw3FheqVo8DTllRy/nT4EoMa9q6VINztElQPFRVb29cccLjZbzjSJsZR eRQmfcJ/n+nCYCVe9b+BWYBJ1LgV2iHr85HIMojw7mv+BhnuuR98JOlFkfqah5ZiBbA8 idkQ== 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 :content-transfer-encoding; bh=LNinOfUJINPcfdOxhYvsgsalnU1GKLpLDBpG0mAohAc=; b=DO3PR7I0liFhdchpb7twB/licO+qahIidaAmig572sSAIwNxXtaYKdQk6oa+jSvbyN SlUVNDtCujah2ibhGaheLTuP0h8C7UFebRomM2caxjk/ufCvqJU+1sxBskkHGJ6sHhDf qgQ4gMeZpbuLvSDc3kH9tHGnx5sx1lCxqd1p3xcC456sPzZ1Tx2R6WvPTAusHyiltktR ignqv/RcahOVVle0WG0bs26tXughDdoz+zq3FsTyH2a8XD0Qc6njE1iu1XaBnh6ug9Ms GWyXSY/DXoAmJcGDRCwkv8MfGkSbfaDYzH/Iyj8hmX34PcMj9J2csU+D7zZILr0KwHp1 qMAQ== X-Gm-Message-State: AOAM533PR/8ItQGvUVE9palewqmtiI1FJkbx5Rok27HNzBkv9mIiVj05 Pw+o4riv4mfffLS7BdDAuBM= X-Google-Smtp-Source: ABdhPJxEmyd/fVeOUjyk7iQ/WLxWnrDrhtacIwVjgE+LHn4GCwVnNtolqtkZfzUNk0y77xteCo9kSQ== X-Received: by 2002:a63:e405:: with SMTP id a5mr5864785pgi.150.1627717924655; Sat, 31 Jul 2021 00:52:04 -0700 (PDT) Received: from localhost.localdomain ([45.135.186.29]) by smtp.gmail.com with ESMTPSA id y15sm5470504pga.34.2021.07.31.00.52.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 31 Jul 2021 00:52:04 -0700 (PDT) From: Tuo Li To: jejb@linux.ibm.com, martin.petersen@oracle.com, sumit.semwal@linaro.org, christian.koenig@amd.com, colin.king@canonical.com, jiapeng.chong@linux.alibaba.com Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, baijiaju1990@gmail.com, Tuo Li , TOTE Robot Subject: [PATCH] scsi: csiostor: fix possible null-pointer dereference in csio_eh_lun_reset_handler() Date: Sat, 31 Jul 2021 00:51:48 -0700 Message-Id: <20210731075148.72494-1-islituo@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The variable rn is checked in: if (!rn) If rn is NULL, the program goes to the label fail: fail: CSIO_INC_STATS(rn, n_lun_rst_fail); However, rn is dereferenced in this macro: #define CSIO_INC_STATS(elem, val) ((elem)->stats.val++) To fix this possible null-pointer dereference, the function returns FAILED directly if rn is NULL. Reported-by: TOTE Robot Signed-off-by: Tuo Li --- drivers/scsi/csiostor/csio_scsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/csiostor/csio_scsi.c b/drivers/scsi/csiostor/csio_scsi.c index 56b9ad0a1ca0..df0bf8348860 100644 --- a/drivers/scsi/csiostor/csio_scsi.c +++ b/drivers/scsi/csiostor/csio_scsi.c @@ -2070,7 +2070,7 @@ csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd) struct csio_scsi_level_data sld; if (!rn) - goto fail; + return FAILED; csio_dbg(hw, "Request to reset LUN:%llu (ssni:0x%x tgtid:%d)\n", cmnd->device->lun, rn->flowid, rn->scsi_id);