diff options
Diffstat (limited to 'board/cr50/tpm_nvmem_ops.c')
| -rw-r--r-- | board/cr50/tpm_nvmem_ops.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/board/cr50/tpm_nvmem_ops.c b/board/cr50/tpm_nvmem_ops.c index 92e8721b0a..634a540239 100644 --- a/board/cr50/tpm_nvmem_ops.c +++ b/board/cr50/tpm_nvmem_ops.c @@ -38,6 +38,16 @@ enum tpm_read_rv read_tpm_nvmem(uint16_t obj_index, NvReadIndexInfo(object_handle, handle_addr, &nvIndex); /* + * Check that the index was written to. Otherwise, behave as if the + * index doesn't exist. + */ + if (nvIndex.publicArea.attributes.TPMA_NV_WRITTEN == 0) { + CPRINTF("%s: object at 0x%x not written\n", + __func__, obj_index); + return TPM_READ_NOT_FOUND; + } + + /* * We presume it is readable and are not checking the access * limitations. */ |