linux-kernel - Re: [PATCH net] net: phy: micrel: Fix potential null pointer dereference

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Message-ID: <9e326e82-d1a6-4058-b9e2-299817fea953@lunn.ch>
Date: Sat, 30 Mar 2024 17:52:45 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Aleksandr Mishin <amishin@...rgos.ru>
Cc: Divya Koppera <Divya.Koppera@...rochip.com>,
	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>,
	Richard Cochran <richardcochran@...il.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: Re: [PATCH net] net: phy: micrel: Fix potential null pointer
 dereference

On Fri, Mar 29, 2024 at 09:16:31AM +0300, Aleksandr Mishin wrote:
> In lan8814_get_sig_rx() and lan8814_get_sig_tx() ptp_parse_header() may
> return NULL as ptp_header due to abnormal packet type or corrupted packet.
> Fix this bug by adding ptp_header check.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: ece19502834d ("net: phy: micrel: 1588 support for LAN8814 phy")
> Signed-off-by: Aleksandr Mishin <amishin@...rgos.ru>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew