On Thu, Sep 06, 2018 at 10:03:37PM +0200, Corentin Labbe wrote:
> On Mon, Aug 27, 2018 at 10:21:51AM +0200, Johan Hovold wrote:
> > Use the new of_get_compatible_child() helper to lookup the mdio-internal
> > child node instead of using of_find_compatible_node(), which searches
> > the entire tree from a given start node and thus can return an unrelated
> > (i.e. non-child) node.
> >
> > This also addresses a potential use-after-free (e.g. after probe
> > deferral) as the tree-wide helper drops a reference to its first
> > argument (i.e. the mdio-mux node). Fortunately, this was inadvertently
> > balanced by a failure to drop the mdio-mux reference after lookup.
> >
> > While at it, also fix the related mdio-internal- and phy-node reference
> > leaks.
> >
> > Fixes: 634db83b8265 ("net: stmmac: dwmac-sun8i: Handle integrated/external
> > MDIOs")
> > Cc: Corentin Labbe <clabbe.montj...@gmail.com>
> > Cc: Andrew Lunn <and...@lunn.ch>
> > Cc: Giuseppe Cavallaro <peppe.cavall...@st.com>
> > Cc: Alexandre Torgue <alexandre.tor...@st.com>
> > Cc: Jose Abreu <joab...@synopsys.com>
> > Cc: David S. Miller <da...@davemloft.net>
> > Signed-off-by: Johan Hovold <jo...@kernel.org>
> Tested-by: Corentin Labbe <clabbe.montj...@gmail.com>
Thanks for testing.
Johan
