On Tue, 28 Feb 2023 16:35:44 -0800 Peter Collingbourne <pcc@xxxxxxxxxx> wrote: > This reverts commit 487a32ec24be819e747af8c2ab0d5c515508086a. > > The should_skip_kasan_poison() function reads the PG_skip_kasan_poison > flag from page->flags. However, this line of code in free_pages_prepare(): > > page->flags &= ~PAGE_FLAGS_CHECK_AT_PREP; > > clears most of page->flags, including PG_skip_kasan_poison, before calling > should_skip_kasan_poison(), which meant that it would never return true > as a result of the page flag being set. Therefore, fix the code to call > should_skip_kasan_poison() before clearing the flags, as we were doing > before the reverted patch. What are the user visible effects of this change? > Cc: <stable@xxxxxxxxxxxxxxx> # 6.1 Especially if it's cc:stable. Thanks.
