On Wed, Feb 27, 2019 at 12:24:45PM -0500, Qian Cai wrote: > After offlined a memory block, kmemleak scan will trigger a crash, as it > encounters a page ext address that has already been freed during memory > offlining. At the beginning in alloc_page_ext(), it calls > kmemleak_alloc(), but it does not call kmemleak_free() in > free_page_ext(). [...] > diff --git a/mm/page_ext.c b/mm/page_ext.c > index 8c78b8d45117..0b6637d7bae9 100644 > --- a/mm/page_ext.c > +++ b/mm/page_ext.c > @@ -274,6 +274,7 @@ static void free_page_ext(void *addr) > > BUG_ON(PageReserved(page)); > free_pages_exact(addr, table_size); > + kmemleak_free(addr);
Same comment as for v1, call kmemleak_free() before free_pages_exact(). With that: Reviewed-by: Catalin Marinas <[email protected]>
