OpenE2K
/
qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

s390x: sclp: Report insufficient SCCB length 

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 <imbrenda@linux.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
Message-Id: <1569591203-15258-5-git-send-email-imbrenda@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Claudio Imbrenda 2019-09-27 15:33:23 +02:00 committed by Christian Borntraeger
parent d959f6cf50
commit 832be0d8a3
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
hw/s390x/sclp.c
View File

@ -68,6 +68,12 @@ static void read_SCP_info(SCLPDevice *sclp, SCCB *sccb)
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);
@ -118,6 +124,12 @@ 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 (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));