On Thu, Mar 23, 2023 at 12:07:46PM -0700, Hugh Dickins wrote: > On an earlier audit, for different reasons, I did also run across > lib/buildid.c build_id_parse() using find_get_page() without checking > PageUptodate() - looks as if it might do the wrong thing if it races > with khugepaged collapsing text to huge, and should probably have a > similar fix. That shouldn't be using find_get_page(). It should probably use read_cache_folio() which will actually read in the data if it's not present in the page cache, and return an ERR_PTR if the data couldn't be read.
