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Date: Wed, 9 Jan 2019 04:13:52 -0800
From: Matthew Wilcox <willy@infradead.org>
Subject: Re: [PATCH] mm/slub.c: re-randomize random_seq if necessary
Message-ID: <20190109121352.GI6310@bombadil.infradead.org>
References: <20190109090628.1695-1-rocking@whu.edu.cn>
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To: Peng Wang <rocking@whu.edu.cn>
Cc: cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org

On Wed, Jan 09, 2019 at 05:06:27PM +0800, Peng Wang wrote:
> calculate_sizes() could be called in several places
> like (red_zone/poison/order/store_user)_store() while
> random_seq remains unchanged.
> 
> If random_seq is not NULL in calculate_sizes(), re-randomize it.

Why do we want to re-randomise the slab at these points?