Re: [PATCH 1/4] mm/kasan: get rid of speculative shadow checks

On Thu, Jun 1, 2017 at 6:23 PM, Andrey Ryabinin wrote: > For some unaligned memory accesses we have to check additional > byte of the shadow memory. Currently we load that byte speculatively > to have only single load + branch on the optimistic fast path. > > However, this approach have some downs

[PATCH 1/4] mm/kasan: get rid of speculative shadow checks

For some unaligned memory accesses we have to check additional byte of the shadow memory. Currently we load that byte speculatively to have only single load + branch on the optimistic fast path. However, this approach have some downsides: - It's unaligned access, so this prevents porting KASAN on