linux-kernel - Re: [PATCH -mm] mm, swap: Fix swap space leak in error path of swap_free

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Date:   Fri, 21 Apr 2017 09:10:12 -0700
From:   Tim Chen <tim.c.chen@...ux.intel.com>
To:     "Huang, Ying" <ying.huang@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Tim Chen <tim.c.chen@...el.com>,
        Rik van Riel <riel@...hat.com>,
        Hugh Dickins <hughd@...gle.com>, Shaohua Li <shli@...nel.org>,
        Minchan Kim <minchan@...nel.org>
Subject: Re: [PATCH -mm] mm, swap: Fix swap space leak in error path of
 swap_free_entries()

On Fri, 2017-04-21 at 20:47 +0800, Huang, Ying wrote:
> From: Huang Ying <ying.huang@...el.com>
> 
> In swapcache_free_entries(), if swap_info_get_cont() return NULL,
> something wrong occurs for the swap entry.  But we should still
> continue to free the following swap entries in the array instead of
> skip them to avoid swap space leak.  This is just problem in error
> path, where system may be in an inconsistent state, but it is still
> good to fix it.
> 

Acked-by: Tim Chen <tim.c.chen@...ux.intel.com>

> Signed-off-by: "Huang, Ying" <ying.huang@...el.com>
> Cc: Tim Chen <tim.c.chen@...el.com>
> Cc: Rik van Riel <riel@...hat.com>
> Cc: Hugh Dickins <hughd@...gle.com>
> Cc: Shaohua Li <shli@...nel.org>
> Cc: Minchan Kim <minchan@...nel.org>
> ---