linux-ext4 - Re: [PATCH] fscrypto: move ioctl processing more fully into common code

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Message-ID: <20161127000901.wuyl6t6wp6qhmkrs@thunk.org>
Date:   Sat, 26 Nov 2016 19:09:01 -0500
From:   Theodore Ts'o <tytso@....edu>
To:     Eric Biggers <ebiggers@...gle.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, jaegeuk@...nel.org
Subject: Re: [PATCH] fscrypto: move ioctl processing more fully into common
 code

On Mon, Oct 17, 2016 at 09:54:06AM -0700, Eric Biggers wrote:
> In addition, make the common functions do the copies to and from
> userspace rather than duplicating this code within each filesystem, and
> memset the policy to 0 to make it clear there is no stack leak.

I don't see any point of doing this, given that we initialize all
parts of the fscrypt_policy structure; and since this structure is
part of UAPI, we can't change it without breaking userspace.

I'll apply this with the memset (and the above comment in the commit
description) removed.

					- Ted
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