On Fri 18-02-22 13:29:46, Mike Kravetz wrote:
[...]
> @@ -4161,7 +4162,7 @@ static int __init hugepages_setup(char *s)
> }
> if (tmp >= nr_online_nodes)
> goto invalid;
> - node = tmp;
> + node = array_index_nospec(tmp, nr_online_nodes);
> p += count + 1;
> /* Parse hugepages */
> if (sscanf(p, "%lu%n", &tmp, &count) != 1)
> @@ -6889,9 +6890,9 @@ static int __init cmdline_parse_hugetlb_cma(char *p)
> break;
>
> if (s[count] == ':') {
> - nid = tmp;
> - if (nid < 0 || nid >= MAX_NUMNODES)
> + if (tmp >= MAX_NUMNODES)
> break;
> + nid = array_index_nospec(tmp, MAX_NUMNODES);
>
> s += count + 1;
> tmp = memparse(s, &s);
This is an early boot code, how is this supposed to be used as a side
channel?
--
Michal Hocko
SUSE Labs
