netdev - Re: NPD in phy_led_set

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Message-ID: <5558742d-232b-4417-9bea-6369434f8983@lunn.ch>
Date: Thu, 8 Jun 2023 03:30:48 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Florian Fainelli <f.fainelli@...il.com>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Christian Marangi <ansuelsmth@...il.com>,
	Vladimir Oltean <olteanv@...il.com>, Pavel Machek <pavel@....cz>,
	Lee Jones <lee@...nel.org>,
	"linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>
Subject: Re: NPD in phy_led_set_brightness+0x3c

> (gdb) print /x (int)&((struct phy_driver *)0)->led_brightness_set
> $1 = 0x1f0
> 
> so this would indeed look like an use-after-free here. If you tested with a
> PHYLINK enabled driver you might have no seen due to
> phylink_disconnect_phy() being called with RTNL held?

Yes, i've been testing with mvneta, which is phylink.

     Andrew