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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 4AC84C3A5A1 for ; Thu, 22 Aug 2019 17:27:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 168AF23400 for ; Thu, 22 Aug 2019 17:27:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566494824; bh=fmHX5gFkRLE6HEbw4pNjyFQ6FzlHrGcqNU+mkFP+Wpo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=seGojM9ec+RIB2m/zN7YXZkWjqga50M+zBhtXJrrkkAXLS8PQcD6CfuecqlQ3yNg6 NNtUc/TH0TApi9n+ir9NPxGm97LqJMbebarnwDd5OrYLiDDr1EQ5yUUjNgcHa/cANm 6FsN4R/HUA+x/PgxEt840NFmFGueAOxXt6S2D0oo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391943AbfHVR1D (ORCPT ); Thu, 22 Aug 2019 13:27:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:49894 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404474AbfHVRZp (ORCPT ); Thu, 22 Aug 2019 13:25:45 -0400 Received: from localhost (wsip-184-188-36-2.sd.sd.cox.net [184.188.36.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2D98E23426; Thu, 22 Aug 2019 17:25:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566494744; bh=fmHX5gFkRLE6HEbw4pNjyFQ6FzlHrGcqNU+mkFP+Wpo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Of1vQEaaXfq+bTfXupDr1W1+mBMHaVAOuyWGjrjvVcZJzSN6i1NK6OFNVodFAkJDr 8ZDFDB0a18LfNZecrY5X9Wtfp0QktKE9wIp2wHvhk72Hg375sci0G8uzBpmX+y+xem gwksi8lUUWepr6Ys+9Yea+RjhXB1rLQBN0PDcxRc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jia-Ju Bai , Himanshu Madhani , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 4.19 38/85] scsi: qla2xxx: Fix possible fcport null-pointer dereferences Date: Thu, 22 Aug 2019 10:19:11 -0700 Message-Id: <20190822171732.971558743@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190822171731.012687054@linuxfoundation.org> References: <20190822171731.012687054@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ Upstream commit e82f04ec6ba91065fd33a6201ffd7cab840e1475 ] In qla2x00_alloc_fcport(), fcport is assigned to NULL in the error handling code on line 4880: fcport = NULL; Then fcport is used on lines 4883-4886: INIT_WORK(&fcport->del_work, qla24xx_delete_sess_fn); INIT_WORK(&fcport->reg_work, qla_register_fcport_fn); INIT_LIST_HEAD(&fcport->gnl_entry); INIT_LIST_HEAD(&fcport->list); Thus, possible null-pointer dereferences may occur. To fix these bugs, qla2x00_alloc_fcport() directly returns NULL in the error handling code. These bugs are found by a static analysis tool STCheck written by us. Signed-off-by: Jia-Ju Bai Acked-by: Himanshu Madhani Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/qla2xxx/qla_init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index f84f9bf150278..ddce32fe0513a 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -4732,7 +4732,7 @@ qla2x00_alloc_fcport(scsi_qla_host_t *vha, gfp_t flags) ql_log(ql_log_warn, vha, 0xd049, "Failed to allocate ct_sns request.\n"); kfree(fcport); - fcport = NULL; + return NULL; } INIT_WORK(&fcport->del_work, qla24xx_delete_sess_fn); INIT_LIST_HEAD(&fcport->gnl_entry); -- 2.20.1