[PATCH v2] slab: Fix nodeid bounds check for non-contiguous node IDs

[Pekka Enberg]

On 12/1/14 6:28 AM, Paul Mackerras wrote:
> ---
> v2: include the oops message in the patch description
>
>   mm/slab.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/slab.c b/mm/slab.c
> index eb2b2ea..f34e053 100644
> --- a/mm/slab.c
> +++ b/mm/slab.c
> @@ -3076,7 +3076,7 @@ static void *____cache_alloc_node(struct kmem_cache *cachep, gfp_t flags,
>   	void *obj;
>   	int x;
>   
> -	VM_BUG_ON(nodeid > num_online_nodes());
> +	VM_BUG_ON(nodeid < 0 || nodeid >= MAX_NUMNODES);
>   	n = get_node(cachep, nodeid);
>   	BUG_ON(!n);

Reviewed-by: Pekka Enberg <penberg at kernel.org>