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Date:   Wed, 17 Apr 2019 10:06:10 -0400
From:   "Theodore Ts'o" <>
To:     Eric Biggers <>
        Sarthak Kukreti <>,
        Gao Xiang <>
Subject: Re: [PATCH v2 3/5] fs, fscrypt: clear DCACHE_ENCRYPTED_NAME when
 unaliasing directory

On Wed, Mar 20, 2019 at 11:39:11AM -0700, Eric Biggers wrote:
> From: Eric Biggers <>
> Make __d_move() clear DCACHE_ENCRYPTED_NAME on the source dentry.  This
> is needed for when d_splice_alias() moves a directory's encrypted alias
> to its decrypted alias as a result of the encryption key being added.
> Otherwise, the decrypted alias will incorrectly be invalidated on the
> next lookup, causing problems such as unmounting a mount the user just
> mount()ed there.
> Note that we don't have to support arbitrary moves of this flag because
> fscrypt doesn't allow dentries with DCACHE_ENCRYPTED_NAME to be the
> source or target of a rename().
> Fixes: 28b4c263961c ("ext4 crypto: revalidate dentry after adding or removing the key")
> Reported-by: Sarthak Kukreti <>
> Signed-off-by: Eric Biggers <>

Looks good, applied.

					- Ted

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