On Fri, 15 Jul 2022 14:50:13 +0200 Maurizio Lombardi <mlombard@xxxxxxxxxx> wrote: > A number of drivers call page_frag_alloc() with a > fragment's size > PAGE_SIZE. > In low memory conditions, __page_frag_cache_refill() may fail the order 3 > cache allocation and fall back to order 0; > In this case, the cache will be smaller than the fragment, causing > memory corruptions. > > Prevent this from happening by checking if the newly allocated cache > is large enough for the fragment; if not, the allocation will fail > and page_frag_alloc() will return NULL. Can we come up with a Fixes: for this? Should this fix be backported into -stable kernels?
