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[v2,3/4] s390x: sclp: fix error handling for oversize control blocks

Message ID 1569591203-15258-4-git-send-email-imbrenda@linux.ibm.com
State New
Headers show
Series s390x: SCLP error cleanup | expand

Commit Message

Claudio Imbrenda Sept. 27, 2019, 1:33 p.m. UTC 
From: Janosch Frank <frankja@linux.ibm.com>

Requests over 4k are not a spec exception.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
---
 hw/s390x/sclp.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Comments

David Hildenbrand Sept. 27, 2019, 1:44 p.m. UTC | #1 
On 27.09.19 15:33, Claudio Imbrenda wrote:
> From: Janosch Frank <frankja@linux.ibm.com>
> 
> Requests over 4k are not a spec exception.
> 
> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
> Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
> ---
>  hw/s390x/sclp.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c
> index 73244c9..abb6e50 100644
> --- a/hw/s390x/sclp.c
> +++ b/hw/s390x/sclp.c
> @@ -213,8 +213,7 @@ int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code)
>      cpu_physical_memory_read(sccb, &work_sccb, sccb_len);
>  
>      /* Valid sccb sizes */
> -    if (be16_to_cpu(work_sccb.h.length) < sizeof(SCCBHeader) ||
> -        be16_to_cpu(work_sccb.h.length) > SCCB_SIZE) {
> +    if (be16_to_cpu(work_sccb.h.length) < sizeof(SCCBHeader)) {
>          r = -PGM_SPECIFICATION;
>          goto out;
>      }
> 

Acked-by: David Hildenbrand <david@redhat.com>
Christian Borntraeger Sept. 27, 2019, 2:36 p.m. UTC | #2 
On 27.09.19 15:33, Claudio Imbrenda wrote:
> From: Janosch Frank <frankja@linux.ibm.com>
> 
> Requests over 4k are not a spec exception.
> 
> Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
> Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
> ---
>  hw/s390x/sclp.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c
> index 73244c9..abb6e50 100644
> --- a/hw/s390x/sclp.c
> +++ b/hw/s390x/sclp.c
> @@ -213,8 +213,7 @@ int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code)
>      cpu_physical_memory_read(sccb, &work_sccb, sccb_len);
>  
>      /* Valid sccb sizes */
> -    if (be16_to_cpu(work_sccb.h.length) < sizeof(SCCBHeader) ||
> -        be16_to_cpu(work_sccb.h.length) > SCCB_SIZE) {
> +    if (be16_to_cpu(work_sccb.h.length) < sizeof(SCCBHeader)) {
>          r = -PGM_SPECIFICATION;
>          goto out;
>      }
> 

Thanks applied.
diff mbox series

Patch

diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c
index 73244c9..abb6e50 100644
--- a/hw/s390x/sclp.c
+++ b/hw/s390x/sclp.c
@@ -213,8 +213,7 @@  int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code)
     cpu_physical_memory_read(sccb, &work_sccb, sccb_len);
 
     /* Valid sccb sizes */
-    if (be16_to_cpu(work_sccb.h.length) < sizeof(SCCBHeader) ||
-        be16_to_cpu(work_sccb.h.length) > SCCB_SIZE) {
+    if (be16_to_cpu(work_sccb.h.length) < sizeof(SCCBHeader)) {
         r = -PGM_SPECIFICATION;
         goto out;
     }