linux-kernel - Re: [PATCH] mm: Add conditions to avoid out-of-bounds

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Message-ID: <20180604112026.GI19202@dhcp22.suse.cz>
Date:   Mon, 4 Jun 2018 13:20:26 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     nixiaoming <nixiaoming@...wei.com>
Cc:     akpm@...ux-foundation.org, vdavydov.dev@...il.com,
        hannes@...xchg.org, garsilva@...eddedor.com, ktkhai@...tuozzo.com,
        stummala@...eaurora.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH] mm: Add conditions to avoid out-of-bounds

On Mon 04-06-18 18:37:35, nixiaoming wrote:
> In the function memcg_init_list_lru
> if call goto fail when i == 0, will cause out-of-bounds at lru->node[i]

How? All I can see is that the fail path does
	for (i = i - 1; i >= 0; i--)

so it will not do anything for i=0.
-- 
Michal Hocko
SUSE Labs