quoted

+
+     struct snp_guest_request_ioctl input = {
+             .msg_version = 1,
+             .req_data = (__u64)&ext_req,
+             .resp_data = (__u64)buf,
+             .exitinfo2 = 0xff,

Not sure we need this line with 0xff.

The exitinfo2 value had an uninitialized memory bug, where random data
would get returned to user space. I think this is carrying forward the
initial value that sev-guest currently uses.

-- 
-Dionna Glaze, PhD (she/her)