From patchwork Fri Aug 6 11:11:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 12423215 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 AAF81C43216 for ; Fri, 6 Aug 2021 11:11:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8631B601FD for ; Fri, 6 Aug 2021 11:11:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236850AbhHFLMH (ORCPT ); Fri, 6 Aug 2021 07:12:07 -0400 Received: from esa6.hgst.iphmx.com ([216.71.154.45]:47118 "EHLO esa6.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232079AbhHFLMG (ORCPT ); Fri, 6 Aug 2021 07:12:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1628248312; x=1659784312; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=T5iQtR+m8wm/ph6xRjNe4reIj5HsO8pLsUVsDBnawno=; b=F6DZtJM8uL+UU2ntH0EgLrejaoFz8w8WDaK2O6pf/aGb4toebd3aER49 hjlANpYw6llPFzi0KKUlezah4cMttRcM1qW4UYPyH8vbXHEWKz4Xqbe5Q zJZGlg/y+4bCA8tYD9Dywx1uEjLnGAVpjTQ8TPezL8R483CWLJaV4nWCt qzi1glXCor2wlM5sTL6R0Gwpz5oxh6r6SIcLz/8/BRx1AKCgylUOzr1nk 4Ws9sdBbfQEq6rdAeSEIkCLy+lkJstsQD64+sclvOdrQli7SjR8sPLduJ UEzPTDfmAj3mJkZMlAX4nYsl+bQ8Hd6CZSzwdXMryWMQ2IzTnRAS79AGr w==; X-IronPort-AV: E=Sophos;i="5.84,300,1620662400"; d="scan'208";a="177055539" Received: from uls-op-cesaip02.wdc.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 06 Aug 2021 19:11:51 +0800 IronPort-SDR: UnJhJ08Wi/rXK4bsnbmQpO1D8MdQNO37wksJk3hSOY8iVS74fWEEdGp1+vLsuenpOz8IWKLjDD 3Tjr/KKCUsXWU51P0Q8pOhV1jm/FwcKXlsV5s0wtu8VCaATBHt3r5MkLu3Q1yzrmi4AFye8OIO vt3L/rFTnoCrCLkTKLRZ99DUDOJScSlDOh19Rosi8fa1Hbc/LVDMTdJO9/zYRUM6yk7RVGlVnS m182VBgHyeJ1LHR8e1IcUgPahosFHT7uPO/bWoRARDv8X5lXiyB15rbogqJDEY0MXdYvftPzbg Kgp8VAIjYQUruoqY0re6Ib1t Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Aug 2021 03:47:26 -0700 IronPort-SDR: Se+NN54bWB7PzSZkzW28YlNJP6Cl+N3Tt2KVvwFk39RdRPrGUmEbOvzoZC8GEBwSRS+5iXxoQy 3wOl/yZ0t/T56RBfR76UqVK7fhaDW8E3KuX3FXI1MvmK+D3XP5ggwQ/xZN0i8DjHA38SxJEz62 Eco/HeirkpKGjPTsxXdggfkFNb9rMcOC0j0ToSofiFK0wBZvTRQG3bHdnktq1Wv8FqpG6lyDNd /nTDCdaZDcxiB/RBV4z5QTpehSD6kb1haGP1jn87AhB6BLBafRgNq+ye6V+6By5V1f86rCS9QE Jvw= WDCIronportException: Internal Received: from washi.fujisawa.hgst.com ([10.149.53.254]) by uls-op-cesaip02.wdc.com with ESMTP; 06 Aug 2021 04:11:50 -0700 From: Damien Le Moal To: Jens Axboe , linux-block@vger.kernel.org, linux-ide@vger.kernel.org, "Martin K . Petersen" , linux-scsi@vger.kernel.org Cc: Sathya Prakash , Sreekanth Reddy , Suganath Prabu Subramani Subject: [PATCH v3 1/9] libata: fix ata_host_alloc_pinfo() Date: Fri, 6 Aug 2021 20:11:37 +0900 Message-Id: <20210806111145.445697-2-damien.lemoal@wdc.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210806111145.445697-1-damien.lemoal@wdc.com> References: <20210806111145.445697-1-damien.lemoal@wdc.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Avoid a potential NULL pointer dereference by testing that the ATA port info variable "pi". Reported-by: kernel test robot Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke --- drivers/ata/libata-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 61c762961ca8..ea8b91297f12 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5458,7 +5458,7 @@ struct ata_host *ata_host_alloc_pinfo(struct device *dev, ap->link.flags |= pi->link_flags; ap->ops = pi->port_ops; - if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) + if (!host->ops && pi && pi->port_ops != &ata_dummy_port_ops) host->ops = pi->port_ops; }