On Thu, 14 Jul 2022 17:59:53 +0800 Miaohe Lin <linmiaohe@xxxxxxxxxx> wrote: > On 2022/7/14 1:23, Andrew Morton wrote: > > On Tue, 12 Jul 2022 21:05:42 +0800 Miaohe Lin <linmiaohe@xxxxxxxxxx> wrote: > > > >> In MCOPY_ATOMIC_CONTINUE case with a non-shared VMA, pages in the page > >> cache are installed in the ptes. But hugepage_add_new_anon_rmap is called > >> for them mistakenly because they're not vm_shared. This will corrupt the > >> page->mapping used by page cache code. > > > > Well that sounds bad. And theories on why this has gone unnoticed for > > over a year? I assume this doesn't have coverage in our selftests? > > As discussed in another thread, when minor fault handling is proposed, only > VM_SHARED vma is expected to be supported So... do we feel that this fix should be backported? And if so, is there a suitable commit for the Fixes:?
