linux-kernel - [PATCH RESEND v3 7/9] phy: fixed-phy: properly validate phy in fixed_phy_update

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Message-Id: <E1ZfCJb-0004Rx-G8@rmk-PC.arm.linux.org.uk>
Date:	Thu, 24 Sep 2015 20:36:23 +0100
From:	Russell King <rmk+kernel@....linux.org.uk>
To:	Florian Fainelli <f.fainelli@...il.com>,
	David Miller <davem@...emloft.net>
Cc:	devicetree@...r.kernel.org, Frank Rowand <frowand.list@...il.com>,
	Grant Likely <grant.likely@...aro.org>,
	Iyappan Subramanian <isubramanian@....com>,
	Keyur Chudgar <kchudgar@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linuxppc-dev@...ts.ozlabs.org, Li Yang <leoli@...escale.com>,
	Michal Simek <michal.simek@...inx.com>, netdev@...r.kernel.org,
	Robert Richter <rric@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	"Soren Brinkmann" <soren.brinkmann@...inx.com>,
	Sunil Goutham <sgoutham@...ium.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH RESEND v3 7/9] phy: fixed-phy: properly validate phy in
 fixed_phy_update_state()

Validate that the phy_device passed into fixed_phy_update_state() is a
fixed-phy device before walking the list of phys for a fixed phy at the
same address.

Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
---
 drivers/net/phy/fixed_phy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
index fb1299c6326e..e23bf5b90e17 100644
--- a/drivers/net/phy/fixed_phy.c
+++ b/drivers/net/phy/fixed_phy.c
@@ -220,7 +220,7 @@ int fixed_phy_update_state(struct phy_device *phydev,
 	struct fixed_mdio_bus *fmb = &platform_fmb;
 	struct fixed_phy *fp;
 
-	if (!phydev || !phydev->bus)
+	if (!phydev || phydev->bus != fmb->mii_bus)
 		return -EINVAL;
 
 	list_for_each_entry(fp, &fmb->phys, node) {
-- 
2.1.0

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