s390x/pci: add length checking for pci sclp handlers
The configure/deconfigure sclp commands need a SCCB with a length of at least 16. Indicate in the response code if this is not fulfilled. Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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@ -113,6 +113,11 @@ void s390_pci_sclp_configure(SCCB *sccb)
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S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(be32_to_cpu(psccb->aid));
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uint16_t rc;
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if (be16_to_cpu(sccb->h.length) < 16) {
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rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH;
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goto out;
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}
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if (pbdev) {
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if (pbdev->configured) {
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rc = SCLP_RC_NO_ACTION_REQUIRED;
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@ -124,7 +129,7 @@ void s390_pci_sclp_configure(SCCB *sccb)
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DPRINTF("sclp config no dev found\n");
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rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
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}
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out:
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psccb->header.response_code = cpu_to_be16(rc);
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}
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@ -134,6 +139,11 @@ void s390_pci_sclp_deconfigure(SCCB *sccb)
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S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(be32_to_cpu(psccb->aid));
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uint16_t rc;
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if (be16_to_cpu(sccb->h.length) < 16) {
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rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH;
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goto out;
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}
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if (pbdev) {
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if (!pbdev->configured) {
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rc = SCLP_RC_NO_ACTION_REQUIRED;
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@ -151,7 +161,7 @@ void s390_pci_sclp_deconfigure(SCCB *sccb)
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DPRINTF("sclp deconfig no dev found\n");
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rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
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}
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out:
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psccb->header.response_code = cpu_to_be16(rc);
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}
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