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s390x: sclp: boundary check 

All sclp codes need to be checked for page boundary violations.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
Message-Id: <1569591203-15258-3-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:
Janosch Frank 2019-09-27 15:33:21 +02:00 committed by Christian Borntraeger
parent 679b844756
commit 6f6c9333ef
1 changed files with 5 additions and 0 deletions
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5
hw/s390x/sclp.c
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@ -234,6 +234,11 @@ int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code)
goto out_write;
}
if ((sccb + be16_to_cpu(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,