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Date:   Sat, 21 Aug 2021 13:29:03 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Leah Rumancik <leah.rumancik@gmail.com>
Cc:     stable@vger.kernel.org, miklos@szeredi.hu,
        Murphy Zhou <jencce.kernel@gmail.com>,
        Miklos Szeredi <mszeredi@redhat.com>
Subject: Re: [PATCH] ovl: add splice file read write helper
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References: <20210820195929.1926705-1-leah.rumancik@gmail.com>
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On Fri, Aug 20, 2021 at 07:59:29PM +0000, Leah Rumancik wrote:
> From: Murphy Zhou <jencce.kernel@gmail.com>
> 
> Now overlayfs falls back to use default file splice read
> and write, which is not compatiple with overlayfs, returning
> EFAULT. xfstests generic/591 can reproduce part of this.
> 
> Tested this patch with xfstests auto group tests.
> 
> [ Needed in 5.4 to fix a deadlock triggered via
>   xfstests overlay/019 -- Leah Rumancik ]
> 
> Signed-off-by: Murphy Zhou <jencce.kernel@gmail.com>
> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
> ---
>  fs/overlayfs/file.c | 47 +++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 47 insertions(+)
> 

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>