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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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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) =20 read_info->ibc_val =3D cpu_to_be32(s390_get_ibc_val()); =20 + if (sccb->h.length < (sizeof(ReadInfo) + cpu_count * sizeof(CPUEntry))= ) { + sccb->h.response_code =3D cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LE= NGTH); + 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 =3D cpu_to_be16(offsetof(ReadCpuInfo, entr= ies)); cpu_info->nr_standby =3D cpu_to_be16(0); =20 + if (sccb->h.length < (sizeof(ReadCpuInfo) + cpu_count * sizeof(CPUEntr= y))) { + sccb->h.response_code =3D cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LE= NGTH); + return; + } + /* The standby offset is 16-byte for each CPU */ cpu_info->offset_standby =3D cpu_to_be16(cpu_info->offset_configured + cpu_info->nr_configured*sizeof(CPUEntry)); --=20 2.7.4