linux-kernel - Re: [PATCH] prctl: fix overwrite last but one entry in auxv vector

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Message-ID: <YFg8UgvzADiUyDoe@grain>
Date:   Mon, 22 Mar 2021 09:42:26 +0300
From:   Cyrill Gorcunov <gorcunov@...il.com>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Alexey Dobriyan <adobriyan@...il.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Andrey Vagin <avagin@...il.com>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] prctl: fix overwrite last but one entry in auxv vector

On Sun, Mar 21, 2021 at 11:36:42PM +0300, Cyrill Gorcunov wrote:
> Alexey reported that current PR_SET_MM_AUXV (and PR_SET_MM_MAP) overwrite
> too many entries on non 64bit kernels. This is because auxv is defined
> as an array of longs and in result access to AT_VECTOR_SIZE - 2 entry
> is not a type of auxv entry but rather an entry before the last one.

Drop this patch, please. I'll make a new version.