On Tue, May 16, 2023 at 07:21:11PM -0700, Peter Collingbourne wrote:
Commit c145e0b47c77 ("mm: streamline COW logic in do_swap_page()") moved the call to swap_free() before the call to set_pte_at(), which meant that the MTE tags could end up being freed before set_pte_at() had a chance to restore them. Fix it by adding a call to the arch_swap_restore() hook before the call to swap_free().
Signed-off-by: Peter Collingbourne pcc@google.com Link: https://linux-review.googlesource.com/id/I6470efa669e8bd2f841049b8c61020c510... Cc: stable@vger.kernel.org # 6.1 Fixes: c145e0b47c77 ("mm: streamline COW logic in do_swap_page()") Reported-by: Qun-wei Lin (林群崴) Qun-wei.Lin@mediatek.com Closes: https://lore.kernel.org/all/5050805753ac469e8d727c797c2218a9d780d434.camel@m...
Acked-by: Catalin Marinas catalin.marinas@arm.com