diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index 14df519ae7ee..068b901034cb 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -2286,7 +2286,8 @@ static int sev_ioctl_do_pdh_export(struct sev_issue_cmd *argp, bool writable)
 	/* Userspace wants to query the certificate length. */
 	if (!input.pdh_cert_address ||
 	    !input.pdh_cert_len ||
-	    !input.cert_chain_address)
+	    !input.cert_chain_address ||
+	    !input.cert_chain_len)
 		goto cmd;
 
 	/* Allocate a physically contiguous buffer to store the PDH blob. */