On Wed, Mar 20, 2019 at 11:39:11AM -0700, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@xxxxxxxxxx>
>
> 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 <sarthakkukreti@xxxxxxxxxxxx>
> Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Looks good, applied.
- Ted
