From patchwork Thu Sep 26 11:33:41 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudio Imbrenda X-Patchwork-Id: 11162599 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 CBD94112B for ; Thu, 26 Sep 2019 11:35:29 +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 AC3B6222C0 for ; Thu, 26 Sep 2019 11:35:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AC3B6222C0 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]:34228 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iDS3U-0001H5-OZ for patchwork-qemu-devel@patchwork.kernel.org; Thu, 26 Sep 2019 07:35:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54944) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iDS22-0007jU-HC for qemu-devel@nongnu.org; Thu, 26 Sep 2019 07:34:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iDS20-0007nV-5z for qemu-devel@nongnu.org; Thu, 26 Sep 2019 07:33:57 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:23128 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 1iDS20-0007jh-1S for qemu-devel@nongnu.org; Thu, 26 Sep 2019 07:33:56 -0400 Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x8QBWFxj029729 for ; Thu, 26 Sep 2019 07:33:49 -0400 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0a-001b2d01.pphosted.com with ESMTP id 2v8ur5tc8k-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 26 Sep 2019 07:33:49 -0400 Received: from localhost by e06smtp07.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 26 Sep 2019 12:33:44 +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 x8QBXhBl50397318 (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 1FDEA4C044; 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 D755B4C040; Thu, 26 Sep 2019 11:33:42 +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 11:33:42 +0000 (GMT) From: Claudio Imbrenda To: qemu-devel@nongnu.org, qemu-s390x@nongnu.org Subject: [PATCH v1 1/2] s390x: Add sclp boundary check and fix error priority Date: Thu, 26 Sep 2019 13:33:41 +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: 19092611-0028-0000-0000-000003A2DE34 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19092611-0029-0000-0000-00002464FBA7 Message-Id: <1569497622-12496-2-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" From: Janosch Frank * All sclp codes need to be checked for page boundary violations. * Requests over 4k are not a spec exception. * Invalid command checking has to be done before the boundary check. Signed-off-by: Janosch Frank Reviewed-by: Jason J. Herne --- hw/s390x/event-facility.c | 3 --- hw/s390x/sclp.c | 25 ++++++++++++++++++++++--- 2 files changed, 22 insertions(+), 6 deletions(-) diff --git a/hw/s390x/event-facility.c b/hw/s390x/event-facility.c index 797ecbb..6620569 100644 --- a/hw/s390x/event-facility.c +++ b/hw/s390x/event-facility.c @@ -377,9 +377,6 @@ static void command_handler(SCLPEventFacility *ef, SCCB *sccb, uint64_t code) case SCLP_CMD_WRITE_EVENT_MASK: write_event_mask(ef, sccb); break; - default: - sccb->h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND); - break; } } diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c index fac7c3b..76feac8 100644 --- a/hw/s390x/sclp.c +++ b/hw/s390x/sclp.c @@ -213,14 +213,33 @@ int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code) cpu_physical_memory_read(sccb, &work_sccb, sccb_len); /* Valid sccb sizes */ - if (be16_to_cpu(work_sccb.h.length) < sizeof(SCCBHeader) || - be16_to_cpu(work_sccb.h.length) > SCCB_SIZE) { + if (be16_to_cpu(work_sccb.h.length) < sizeof(SCCBHeader)) { r = -PGM_SPECIFICATION; goto out; } - sclp_c->execute(sclp, &work_sccb, code); + switch (code & SCLP_CMD_CODE_MASK) { + case SCLP_CMDW_READ_SCP_INFO: + case SCLP_CMDW_READ_SCP_INFO_FORCED: + case SCLP_CMDW_READ_CPU_INFO: + case SCLP_CMDW_CONFIGURE_IOA: + case SCLP_CMDW_DECONFIGURE_IOA: + case SCLP_CMD_READ_EVENT_DATA: + case SCLP_CMD_WRITE_EVENT_DATA: + case SCLP_CMD_WRITE_EVENT_MASK: + break; + default: + work_sccb.h.response_code = cpu_to_be16(SCLP_RC_INVALID_SCLP_COMMAND); + goto out_write; + } + if ((sccb + work_sccb.h.length) > ((sccb & PAGE_MASK) + PAGE_SIZE)) { + work_sccb.h.response_code = cpu_to_be16(SCLP_RC_SCCB_BOUNDARY_VIOLATION); + goto out_write; + } + + sclp_c->execute(sclp, &work_sccb, code); +out_write: cpu_physical_memory_write(sccb, &work_sccb, be16_to_cpu(work_sccb.h.length));