Re: [PATCH] pipe: Fail cleanly when root tries F_SETPIPE_SZ with bigsize

[Al Viro]

On Fri, Nov 18, 2011 at 10:04:34PM +0200, Sasha Levin wrote:

> +	if (nr_pages * sizeof(struct pipe_buffer) > KMALLOC_MAX_SIZE)
> +		return -ENOMEM;

nr_pages is unsigned long, sizeof is greater than 1, KMALLOC_MAX_SIZE is
unsigned long...  So write that check as KMALLOC_MAX_SIZE / sizeof > nr_pages
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