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Date:   Tue, 14 Jan 2020 08:39:45 -0800
From:   Christoph Hellwig <>
To:     Ritesh Harjani <>
Subject: Re: [RFC 0/2] ext4: Fix stale data read exposure problem with DIO

> Currently there is a small race window as pointed out by Jan [2] where, when
> ext4 tries to allocate a written block for mapped files and if DIO read is in
> progress, then this may result into stale data read exposure problem.

Do we have a test case for the problem?

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