diff --git a/sys/opencrypto/criov.c b/sys/opencrypto/criov.c
--- a/sys/opencrypto/criov.c
+++ b/sys/opencrypto/criov.c
@@ -591,7 +591,7 @@
 			remain = MIN(PAGE_SIZE - cc->cc_offset, cc->cc_buf_len);
 			todo = MIN(remain, size);
 			memcpy(dst, src, todo);
-			src += todo;
+			dst += todo;
 			cc->cc_buf_len -= todo;
 			if (todo < remain) {
 				cc->cc_offset += todo;