netdev - Re: [PATCH 1/2] net: phy: fix NULL pointer dereference in phy_polling

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-prev] [day] [month] [year] [list]

Message-ID: <aJMV67LWuHXExNLa@shell.armlinux.org.uk>
Date: Wed, 6 Aug 2025 09:44:27 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Xu Yang <xu.yang_2@....com>
Cc: andrew@...n.ch, hkallweit1@...il.com, o.rempel@...gutronix.de,
	pabeni@...hat.com, netdev@...r.kernel.org, imx@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] net: phy: fix NULL pointer dereference in
 phy_polling_mode()

On Wed, Aug 06, 2025 at 04:25:12PM +0800, Xu Yang wrote:
> Not all phy devices have phy driver attached, so fix the NULL pointer
> dereference issue in phy_polling_mode() which was observed on USB net
> devices.

When the network device bound to the PHY, either it will be bound to its
PHY driver, or to one of the two genphy drivers. So, this shouldn't
happen. Please explain how to reproduce this.

Thanks.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!