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

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Message-ID: <20161122231536.GA26438@google.com>
Date:   Tue, 22 Nov 2016 15:15:36 -0800
From:   Eric Biggers <ebiggers@...gle.com>
To:     linux-fsdevel@...r.kernel.org
Cc:     linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        tytso@....edu, 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:
> Multiple bugs were recently fixed in the "set encryption policy" ioctl.
> To make it clear that fscrypt_process_policy() and fscrypt_get_policy()
> implement ioctls and therefore their implementations must take standard
> security and correctness precautions, rename them to
> fscrypt_ioctl_set_policy() and fscrypt_ioctl_get_policy().  Make the
> latter take in a struct file * to make it consistent with the former.
> 
> 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.
> 

Ted, do you have any interest in taking this patch for 4.10?

Thanks,

Eric
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