netdev - Re: [PATCH v2 3/3] net/ethtool/ioctl: split ethtool_get_phy

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Date:   Tue, 29 Nov 2022 18:39:41 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Daniil Tatianin <d-tatianin@...dex-team.ru>,
        netdev@...r.kernel.org, Michal Kubecek <mkubecek@...e.cz>,
        yc-core@...dex-team.ru, lvc-project@...uxtesting.org
Subject: Re: [PATCH v2 3/3] net/ethtool/ioctl: split ethtool_get_phy_stats
 into multiple helpers

On Wed, 30 Nov 2022 01:25:06 +0100 Andrew Lunn wrote:
> On Tue, Nov 29, 2022 at 01:38:01PM +0300, Daniil Tatianin wrote:
> > So that it's easier to follow and make sense of the branching and
> > various conditions.
> > 
> > Stats retrieval has been split into two separate functions
> > ethtool_get_phy_stats_phydev & ethtool_get_phy_stats_ethtool.
> > The former attempts to retrieve the stats using phydev & phy_ops, while
> > the latter uses ethtool_ops.
> > 
> > Actual n_stats validation & array allocation has been moved into a new
> > ethtool_vzalloc_stats_array helper.
> > 
> > This also fixes a potential NULL dereference of
> > ops->get_ethtool_phy_stats where it was getting called in an else branch
> > unconditionally without making sure it was actually present.
> > 
> > Found by Linux Verification Center (linuxtesting.org) with the SVACE
> > static analysis tool.
> > 
> > Signed-off-by: Daniil Tatianin <d-tatianin@...dex-team.ru>  
> 
> Reviewed-by: Andrew Lunn <andrew@...n.ch>

FWIW the patches did not hit the list, once again :/