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From: Rasmus Villemoes <>
To: Mel Gorman <>
Cc: Andrew Morton <>,
	Alexander Lobakin <>,
	Vlastimil Babka <>,,
Subject: Re: [PATCH] mm/page_alloc: __alloc_pages_bulk(): do bounds check before accessing array
Date: Mon, 21 Jun 2021 18:01:17 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On 07/05/2021 12.26, Mel Gorman wrote:
> On Fri, May 07, 2021 at 08:45:03AM +0200, Rasmus Villemoes wrote:
>> In the event that somebody would call this with an already fully
>> populated page_array, the last loop iteration would do an access
>> beyond the end of page_array.
>> It's of course extremely unlikely that would ever be done, but this
>> triggers my internal static analyzer. Also, if it really is not
>> supposed to be invoked this way (i.e., with no NULL entries in
>> page_array), the nr_populated<nr_pages check could simply be removed
>> instead.
>> Fixes: 0f87d9d30f21 (mm/page_alloc: add an array-based interface to the bulk page allocator)
>> Signed-off-by: Rasmus Villemoes <>
> Acked-by: Mel Gorman <>

Andrew, will you get this to Linus before 5.13 is released? I got a mail
on May 9 that it had been added to your queue, but I don't see it in
master yet.


  reply	other threads:[~2021-06-21 16:01 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-07  6:45 Rasmus Villemoes
2021-05-07 10:26 ` Mel Gorman
2021-06-21 16:01   ` Rasmus Villemoes [this message]
2021-06-23  4:49     ` Andrew Morton

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