Re: [RFC PATCH 1/3] fs/pipe: Limit the slots in pipe_resize_ring()

[Oleg Nesterov]

On 03/06, K Prateek Nayak wrote:
>
> @@ -1272,6 +1272,10 @@ int pipe_resize_ring(struct pipe_inode_info *pipe, unsigned int nr_slots)
>  	struct pipe_buffer *bufs;
>  	unsigned int head, tail, mask, n;
>
> +	/* nr_slots larger than limits of pipe->{head,tail} */
> +	if (unlikely(nr_slots > BIT(BITS_PER_TYPE(pipe_index_t) - 1)))

Hmm, perhaps

	if (nr_slots > (pipe_index_t)-1u)

is more clear?

Oleg.