On 23/01/19 19:33, Tom Roeder wrote: > > Even in vmx_set_nested_state, there are about 30 lines of code in > between enter_vmx_operation and copy_from_user, and there are a couple > of cases that cause vmx_set_nested_state to return with an error. So if > we want to fix this by handling all the error paths, I think it might be > cleanest to convert vmx_set_nested_state to use goto error handling, > since that would allow us to clear the allocated memory in one place.
I prefer to have kzalloc, and change vmx_get_nested_state to copy the whole page including the trailing zeroes. Paolo
