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SubjectRe: [PATCH] net: phy: Handle postive return codes in phy_connect
On Sat, Sep 05, 2015 at 09:18:40PM +0200, Andrew Lunn wrote:
> On Sat, Sep 05, 2015 at 01:01:29PM -0500, Michael Welling wrote:
> > The function phy_connect_direct can possibly return a positive
> > return code. Using ERR_PTR with a positive value can lead to
> > deferencing of an invalid pointer.
>
> Is this the correct fix? Would it not be better to find where the
> positive return code is from and fix that?

I guess I can trace it back to find out where the positive return code
is originating.

Is phy_connect_direct always supposed to return valid -errno?

>
> Andrew
>
> > Signed-off-by: Michael Welling <mwelling@ieee.org>
> > ---
> > drivers/net/phy/phy_device.c | 3 +++
> > 1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> > index c0f2111..a7e14a6 100644
> > --- a/drivers/net/phy/phy_device.c
> > +++ b/drivers/net/phy/phy_device.c
> > @@ -477,6 +477,9 @@ struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
> > phydev = to_phy_device(d);
> >
> > rc = phy_connect_direct(dev, phydev, handler, interface);
> > + if (rc > 0)
> > + return ERR_PTR(-ENODEV);
> > +
> > if (rc)
> > return ERR_PTR(rc);
> >
> > --
> > 2.1.4
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe netdev" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html


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