Re: [PATCH] mm/slab_common.c: fix possible spectre-v1 in kmalloc_slab()

Alexey Dobriyan
2019-05-29T20:31:11Z

> I think it makes more sense to sanitize size in size_index_elem(),
> don't you?

> - return (bytes - 1) / 8;
> + return array_index_nospec((bytes - 1) / 8, ARRAY_SIZE(size_index));

I think it should be fixed in poll.
Literally every small variable kmalloc call is going through this function.