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Thu, 23 Jul 2020 16:27:19 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D5C5E4203F; Thu, 23 Jul 2020 16:27:19 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7853642045; Thu, 23 Jul 2020 16:27:19 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 23 Jul 2020 16:27:19 +0000 (GMT) From: Halil Pasic To: Cornelia Huck , qemu-s390x@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH 1/1] s390x/s390-virtio-ccw: fix loadparm property getter Date: Thu, 23 Jul 2020 18:27:17 +0200 Message-Id: <20200723162717.88485-1-pasic@linux.ibm.com> X-Mailer: git-send-email 2.17.1 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-23_08:2020-07-23, 2020-07-23 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 adultscore=0 priorityscore=1501 lowpriorityscore=0 mlxscore=0 bulkscore=0 impostorscore=0 spamscore=0 clxscore=1015 malwarescore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007230115 Received-SPF: pass client-ip=148.163.158.5; envelope-from=pasic@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/23 10:22:03 X-ACL-Warn: Detected OS = Linux 3.x [generic] X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: Thomas Huth , David Hildenbrand , Halil Pasic , Christian Borntraeger , Claudio Imbrenda , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The function machine_get_loadparm() is supposed to produce as C-string, that is a null-terminated one, but it does not. ElectricFence can detect this problem if the loadparm machine property is used. Let us make the returned string a null-terminated one. Signed-off-by: Halil Pasic Fixes: 7104bae9de ("hw/s390x: provide loadparm property for the machine") --- hw/s390x/s390-virtio-ccw.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index 8cc2f25d8a..e0e4a69ac8 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -701,8 +701,12 @@ bool hpage_1m_allowed(void) static char *machine_get_loadparm(Object *obj, Error **errp) { S390CcwMachineState *ms = S390_CCW_MACHINE(obj); + char *loadparm_str; - return g_memdup(ms->loadparm, sizeof(ms->loadparm)); + /* make a null-terminated string */ + loadparm_str = g_memdup(ms->loadparm, sizeof(ms->loadparm) + 1); + loadparm_str[sizeof(ms->loadparm)] = 0; + return loadparm_str; } static void machine_set_loadparm(Object *obj, const char *val, Error **errp) base-commit: 53ce7b47b5bf47db067b81c18c786ed7b792d031 -- 2.17.1