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From: Eric Biggers <ebiggers@kernel.org>
To: Janne Karhunen <janne.karhunen@gmail.com>
Cc: linux-integrity@vger.kernel.org,
	linux-security-module@vger.kernel.org, zohar@linux.ibm.com,
	linux-mm@kvack.org, viro@zeniv.linux.org.uk,
	Konsta Karsisto <konsta.karsisto@gmail.com>
Subject: Re: [PATCH 1/3] ima: keep the integrity state of open files up to date
Date: Mon, 9 Sep 2019 14:39:39 -0700
Message-ID: <20190909213938.GA105935@gmail.com> (raw)
In-Reply-To: <20190902094540.12786-1-janne.karhunen@gmail.com>

On Mon, Sep 02, 2019 at 12:45:38PM +0300, Janne Karhunen wrote:
> When a file is open for writing, kernel crash or power outage
> is guaranteed to corrupt the inode integrity state leading to
> file appraisal failure on the subsequent boot. Add some basic
> infrastructure to keep the integrity measurements up to date
> as the files are written to.
> 
> Core file operations (open, close, sync, msync, truncate) are
> now allowed to update the measurement immediately. In order
> to maintain sufficient write performance for writes, add a
> latency tunable delayed work workqueue for computing the
> measurements.
> 

This still doesn't make it crash-safe.  So why is it okay?

- Eric

  parent reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-02  9:45 Janne Karhunen
2019-09-02  9:45 ` [PATCH 2/3] ima: update the file measurement on truncate Janne Karhunen
2019-09-08 15:38   ` Mimi Zohar
2019-09-02  9:45 ` [PATCH 3/3] ima: update the file measurement on writes Janne Karhunen
2019-09-08 17:07   ` Mimi Zohar
2019-09-02 11:31 ` [PATCH 1/3] ima: keep the integrity state of open files up to date kbuild test robot
2019-09-02 12:57 ` kbuild test robot
2019-09-08 16:35 ` Mimi Zohar
2019-09-09 21:39 ` Eric Biggers [this message]
2019-09-10  7:04   ` Janne Karhunen
2019-09-15 20:24     ` Eric Biggers
2019-09-16 11:45       ` Janne Karhunen
2019-09-17  4:23         ` Eric Biggers
2019-09-17  7:24           ` Janne Karhunen

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