From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-hardening@vger.kernel.org,
Kees Cook <keescook@chromium.org>
Subject: Re: [PATCH][next] block: scsi_ioctl: Avoid the use of one-element arrays
Date: Fri, 2 Oct 2020 19:07:48 -0500 [thread overview]
Message-ID: <20201003000748.GB13557@embeddedor> (raw)
In-Reply-To: <c06da705-3151-0902-066a-92d2e7c558bd@kernel.dk>
On Fri, Oct 02, 2020 at 05:58:33PM -0600, Jens Axboe wrote:
> >>> - void __user *reserved[1]; /* unused, actually */
> >>> + union {
> >>> + void __user *reserved[1]; /* unused, actually */
> >>> + void __user *unused;
> >>> + };
> >>
> >> What's the point of this union, why not just turn it into
> >>
> >> void * __user *unused;
> >>
> >> ?
> >
> > I just don't want to take any chances of breaking any user-space
> > application that, for some reason, may be considering that field.
>
> I guess that's a valid concern, who knows what applications are doing
> to an ignored field.
>
> I'll apply it, thanks.
Awesome. :)
Thanks.
--
Gustavo
next prev parent reply other threads:[~2020-10-03 0:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-02 23:10 [PATCH][next] block: scsi_ioctl: Avoid the use of one-element arrays Gustavo A. R. Silva
2020-10-02 23:53 ` Jens Axboe
2020-10-03 0:03 ` Gustavo A. R. Silva
2020-10-02 23:58 ` Jens Axboe
2020-10-03 0:07 ` Gustavo A. R. Silva [this message]
2020-10-05 7:25 ` Christoph Hellwig
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