linux-hardening - Re: [PATCH][next] block: scsi_ioctl: Avoid the use of one-element arrays

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Message-ID: <20201005072557.GB14204@infradead.org>
Date:   Mon, 5 Oct 2020 08:25:57 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH][next] block: scsi_ioctl: Avoid the use of one-element
 arrays

On Fri, Oct 02, 2020 at 06:10:33PM -0500, Gustavo A. R. Silva wrote:
> One-element arrays are being deprecated[1]. Replace the one-element array
> with a simple object of type compat_caddr_t: 'compat_caddr_t unused'[2],
> once it seems this field is actually never used.

They are only deprecated when abused as variable length array.  That is
not the case here.