linux-kernel - Re: [PATCH] dm verity: deferred hash checking for restart/logging mode

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Message-ID: <20170424155408.GA60835@samitolvanen.mtv.corp.google.com>
Date:   Mon, 24 Apr 2017 08:54:08 -0700
From:   Sami Tolvanen <samitolvanen@...gle.com>
To:     Milan Broz <gmazyland@...il.com>
Cc:     Bongkyu Kim <bongkyu.kim@....com>, agk@...hat.com,
        snitzer@...hat.com, dm-devel@...hat.com, shli@...nel.org,
        linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
        Will Drewry <wad@...omium.org>
Subject: Re: [PATCH] dm verity: deferred hash checking for restart/logging
 mode

On Mon, Apr 24, 2017 at 10:05:03AM +0200, Milan Broz wrote:
> Isn't one of the goal of integrity checking to PREVENT that userspace
> accesses tampered data?

Absolutely. It's not acceptable for dm-verity to return unverified data
to userspace in restart mode.

Sami