netdev - [PATCH] net: phy: Fix potential null pointer access

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20231120093256.3642327-1-lukas.funke-oss@weidmueller.com>
Date: Mon, 20 Nov 2023 10:32:54 +0100
From: Lukas Funke <lukas.funke-oss@...dmueller.com>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.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>
Cc: Lukas Funke <lukas.funke@...dmueller.com>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] net: phy: Fix potential null pointer access

From: Lukas Funke <lukas.funke@...dmueller.com>

When there is no driver associated with the phydev, there will be a
nullptr access. The commit checks if the phydev driver is set before
access.

Signed-off-by: Lukas Funke <lukas.funke@...dmueller.com>
---
 drivers/net/phy/phy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 1135e63a4a76..4de83e3cab77 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -136,7 +136,7 @@ EXPORT_SYMBOL(phy_print_status);
 static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
 {
 	phydev->interrupts = interrupts ? 1 : 0;
-	if (phydev->drv->config_intr)
+	if (phydev->drv && phydev->drv->config_intr)
 		return phydev->drv->config_intr(phydev);
 
 	return 0;
-- 
2.30.2