}
}
+#define SCCB_REQ_LEN(s, max_cpus) (sizeof(s) + max_cpus * sizeof(CPUEntry))
+
/* Provide information about the configuration, CPUs and storage */
static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb)
{
int cpu_count;
int rnsize, rnmax;
IplParameterBlock *ipib = s390_ipl_get_iplb();
+ int required_len = SCCB_REQ_LEN(ReadInfo, machine->possible_cpus->len);
+
+ if (be16_to_cpu(sccb->h.length) < required_len) {
+ sccb->h.response_code = cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LENGTH);
+ return;
+ }
/* CPU information */
prepare_cpu_entries(machine, read_info->entries, &cpu_count);
read_info->ibc_val = cpu_to_be32(s390_get_ibc_val());
- if (be16_to_cpu(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);
MachineState *machine = MACHINE(qdev_get_machine());
ReadCpuInfo *cpu_info = (ReadCpuInfo *) sccb;
int cpu_count;
+ int required_len = SCCB_REQ_LEN(ReadCpuInfo, machine->possible_cpus->len);
+
+ if (be16_to_cpu(sccb->h.length) < required_len) {
+ sccb->h.response_code = cpu_to_be16(SCLP_RC_INSUFFICIENT_SCCB_LENGTH);
+ return;
+ }
prepare_cpu_entries(machine, cpu_info->entries, &cpu_count);
cpu_info->nr_configured = cpu_to_be16(cpu_count);
cpu_info->offset_configured = cpu_to_be16(offsetof(ReadCpuInfo, entries));
cpu_info->nr_standby = cpu_to_be16(0);
- if (be16_to_cpu(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));