linux-kernel - Re: [PATCH sparc-next] sunvdc: Remove VLA usage

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Message-Id: <20181008.111046.1103300226053324861.davem@davemloft.net>
Date:   Mon, 08 Oct 2018 11:10:46 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     keescook@...omium.org
Cc:     axboe@...nel.dk, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org
Subject: Re: [PATCH sparc-next] sunvdc: Remove VLA usage

From: Kees Cook <keescook@...omium.org>
Date: Mon, 8 Oct 2018 08:46:51 -0700

> In the quest to remove all stack VLA usage from the kernel[1], this moves
> the math for cookies calculation into macros and allocates a fixed size
> array for the maximum number of cookies and adds a runtime sanity check.
> (Note that the size was always fixed, but just hidden from the compiler.)
> 
> [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com
> 
> Cc: Jens Axboe <axboe@...nel.dk>
> Cc: linux-block@...r.kernel.org
> Signed-off-by: Kees Cook <keescook@...omium.org>

Applied.