From patchwork Thu Sep 26 11:33:42 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudio Imbrenda X-Patchwork-Id: 11162601 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 55569924 for ; Thu, 26 Sep 2019 11:35:35 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 36767207E0 for ; Thu, 26 Sep 2019 11:35:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 36767207E0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:34230 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iDS3a-0001Op-0a for patchwork-qemu-devel@patchwork.kernel.org; Thu, 26 Sep 2019 07:35:34 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54968) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iDS22-0007m5-89 for qemu-devel@nongnu.org; Thu, 26 Sep 2019 07:33:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iDS20-0007oQ-Vf for qemu-devel@nongnu.org; Thu, 26 Sep 2019 07:33:58 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:35208 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iDS20-0007ln-Gq for qemu-devel@nongnu.org; Thu, 26 Sep 2019 07:33:56 -0400 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x8QBW3GF061324 for ; Thu, 26 Sep 2019 07:33:48 -0400 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0a-001b2d01.pphosted.com with ESMTP id 2v8tjx67yw-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 26 Sep 2019 07:33:48 -0400 Received: from localhost by e06smtp04.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 26 Sep 2019 12:33:46 +0100 Received: from b06cxnps4076.portsmouth.uk.ibm.com (9.149.109.198) by e06smtp04.uk.ibm.com (192.168.101.134) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 26 Sep 2019 12:33:45 +0100 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x8QBXhDV50397320 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 26 Sep 2019 11:33:43 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6CD2C4C044; Thu, 26 Sep 2019 11:33:43 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2EEEC4C040; Thu, 26 Sep 2019 11:33:43 +0000 (GMT) Received: from p-imbrenda.boeblingen.de.ibm.com (unknown [9.152.224.39]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Thu, 26 Sep 2019 11:33:43 +0000 (GMT) From: Claudio Imbrenda To: qemu-devel@nongnu.org, qemu-s390x@nongnu.org Subject: [PATCH v1 2/2] s390x: Fix SCLP return code when buffer too small Date: Thu, 26 Sep 2019 13:33:42 +0200 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1569497622-12496-1-git-send-email-imbrenda@linux.ibm.com> References: <1569497622-12496-1-git-send-email-imbrenda@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19092611-0016-0000-0000-000002B0F3A2 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19092611-0017-0000-0000-00003311C03B Message-Id: <1569497622-12496-3-git-send-email-imbrenda@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-09-26_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1909260111 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.158.5 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: borntraeger@de.ibm.com, cohuck@redhat.com, frankja@linux.ibm.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Return the correct error code when the SCCB buffer is too small to contain all of the output, for the Read SCP Information and Read CPU Information commands. Signed-off-by: Claudio Imbrenda Reviewed-by: Jason J. Herne --- hw/s390x/sclp.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c index 76feac8..8f7fe1c 100644 --- a/hw/s390x/sclp.c +++ b/hw/s390x/sclp.c @@ -68,6 +68,11 @@ static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb) read_info->ibc_val = cpu_to_be32(s390_get_ibc_val()); + if (sccb->h.length < (sizeof(ReadInfo) + cpu_count * sizeof(CPUEntry))) { + sccb->h.response_code = cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LENGTH); + return; + } + /* Configuration Characteristic (Extension) */ s390_get_feat_block(S390_FEAT_TYPE_SCLP_CONF_CHAR, read_info->conf_char); @@ -118,6 +123,11 @@ static void sclp_read_cpu_info(SCLPDevice *sclp, SCCB *sccb) cpu_info->offset_configured = cpu_to_be16(offsetof(ReadCpuInfo, entries)); cpu_info->nr_standby = cpu_to_be16(0); + if (sccb->h.length < (sizeof(ReadCpuInfo) + cpu_count * sizeof(CPUEntry))) { + sccb->h.response_code = cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LENGTH); + return; + } + /* The standby offset is 16-byte for each CPU */ cpu_info->offset_standby = cpu_to_be16(cpu_info->offset_configured + cpu_info->nr_configured*sizeof(CPUEntry));