From: Janosch Frank <frankja@xxxxxxxxxxxxx>
All sclp codes need to be checked for page boundary violations.
Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
Reviewed-by: Jason J. Herne <jjherne@xxxxxxxxxxxxx>
Message-Id: <1569591203-15258-3-git-send-email-imbrenda@xxxxxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
hw/s390x/sclp.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c
index 95ebfe7bd2f1..73244c938b10 100644
--- a/hw/s390x/sclp.c
+++ b/hw/s390x/sclp.c
@@ -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,
--
2.21.0
