diff options
| -rw-r--r-- | drivers/crypto/ccp/sev-dev.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index 86c6858a5c18..e4c7c2a6fe55 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -2339,7 +2339,10 @@ cmd: ret = __sev_do_cmd_locked(SEV_CMD_PDH_CERT_EXPORT, &data, &argp->error); - /* If we query the length, FW responded with expected data. */ + /* + * Firmware will return the length of the blobs (either the minimum + * required length or the actual length written), return 'em to the user. + */ input.cert_chain_len = data.cert_chain_len; input.pdh_cert_len = data.pdh_cert_len; @@ -2348,6 +2351,9 @@ cmd: goto e_free_cert; } + if (ret || WARN_ON_ONCE(argp->error)) + goto e_free_cert; + if (pdh_blob) { if (copy_to_user(input_pdh_cert_address, pdh_blob, input.pdh_cert_len)) { |