On Tue, 18 Oct 2022 15:39:39 +0100 Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > On Tue, Oct 18, 2022 at 10:36:39PM +0800, Tuo Cao wrote: > > The folio returned from __filemap_get_folio may be a NULL, it will > > causes the kernel crash when access folio->page. > > This is not a bug. &folio->page does not dereference folio but performs > pointer arithmetic. This is the third attempt to "fix" this. So far. I think we should take the hint and make the check for a null pointer more explicit.
