netdev - Re: [PATCH] Revert "net: mvpp2: debugfs: fix memory leak when using debugfs

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Date:   Sat, 24 Sep 2022 14:02:21 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     Marcin Wojtas <mw@...ihalf.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        stable@...nel.org
Subject: Re: [PATCH] Revert "net: mvpp2: debugfs: fix memory leak when using
 debugfs_lookup()"

On Fri, Sep 23, 2022 at 07:47:36PM -0400, Sasha Levin wrote:
> This reverts commit fe2c9c61f668cde28dac2b188028c5299cedcc1e.
> 
> On Tue, Sep 13, 2022 at 05:48:58PM +0100, Russell King (Oracle) wrote:
> >What happens if this is built as a module, and the module is loaded,
> >binds (and creates the directory), then is removed, and then re-
> >inserted?  Nothing removes the old directory, so doesn't
> >debugfs_create_dir() fail, resulting in subsequent failure to add
> >any subsequent debugfs entries?
> >
> >I don't think this patch should be backported to stable trees until
> >this point is addressed.
> 
> Revert until a proper fix is available as the original behavior was
> better.
> 
> Cc: Marcin Wojtas <mw@...ihalf.com>
> Cc: Russell King <linux@...linux.org.uk>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Eric Dumazet <edumazet@...gle.com>
> Cc: Jakub Kicinski <kuba@...nel.org>
> Cc: Paolo Abeni <pabeni@...hat.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: netdev@...r.kernel.org
> Cc: stable@...nel.org
> Reported-by: Russell King <linux@...linux.org.uk>
> Fixes: fe2c9c61f668 ("net: mvpp2: debugfs: fix memory leak when using debugfs_lookup()")
> Signed-off-by: Sasha Levin <sashal@...nel.org>
> ---
>  drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>