netdev - Re: [PATCH net-next v17 11/14] net: ethtool: cable-test: Target the command to the requested PHY

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Message-ID: <20240827073359.5d47c077@fedora-3.home>
Date: Tue, 27 Aug 2024 07:33:59 +0200
From: Maxime Chevallier <maxime.chevallier@...tlin.com>
To: Pengfei Xu <pengfei.xu@...el.com>
Cc: <davem@...emloft.net>, <netdev@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>, <thomas.petazzoni@...tlin.com>, Andrew Lunn
 <andrew@...n.ch>, Jakub Kicinski <kuba@...nel.org>, Eric Dumazet
 <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Russell King
 <linux@...linux.org.uk>, <linux-arm-kernel@...ts.infradead.org>,
 "Christophe Leroy" <christophe.leroy@...roup.eu>, Herve Codina
 <herve.codina@...tlin.com>, Florian Fainelli <f.fainelli@...il.com>, Heiner
 Kallweit <hkallweit1@...il.com>, Vladimir Oltean <vladimir.oltean@....com>,
 Köry Maincent <kory.maincent@...tlin.com>, "Jesse
 Brandeburg" <jesse.brandeburg@...el.com>, Marek Behún
 <kabel@...nel.org>, Piergiorgio Beruto <piergiorgio.beruto@...il.com>,
 Oleksij Rempel <o.rempel@...gutronix.de>, Nicolò Veronese
 <nicveronese@...il.com>, Simon Horman <horms@...nel.org>,
 <mwojtas@...omium.org>, Nathan Chancellor <nathan@...nel.org>, Antoine
 Tenart <atenart@...nel.org>, Marc Kleine-Budde <mkl@...gutronix.de>, Dan
 Carpenter <dan.carpenter@...aro.org>, Romain Gantois
 <romain.gantois@...tlin.com>
Subject: Re: [PATCH net-next v17 11/14] net: ethtool: cable-test: Target the
 command to the requested PHY

Hi,

On Tue, 27 Aug 2024 13:25:52 +0800
Pengfei Xu <pengfei.xu@...el.com> wrote:

> Hi Maxime Chevallier,
> 
> I used syzkaller and found that: there was general protection fault in
> phy_start_cable_test_tdr in Linux next:next-20240826.
> 
> Bisected and found first bad commit:
> "
> 3688ff3077d3 net: ethtool: cable-test: Target the command to the requested PHY
> "
> After reverted below commit on top of next-20240826, this issue was gone.
> 
> All detailed info: https://github.com/xupengfe/syzkaller_logs/tree/main/240826_202302_phy_start_cable_test_tdr
> Syzkaller repro code: https://github.com/xupengfe/syzkaller_logs/blob/main/240826_202302_phy_start_cable_test_tdr/repro.c
> Syzkaller repro syscall steps: https://github.com/xupengfe/syzkaller_logs/blob/main/240826_202302_phy_start_cable_test_tdr/repro.prog
> Syzkaller report: https://github.com/xupengfe/syzkaller_logs/blob/main/240826_202302_phy_start_cable_test_tdr/repro.report
> Kconfig(make olddefconfig): https://github.com/xupengfe/syzkaller_logs/blob/main/240826_202302_phy_start_cable_test_tdr/kconfig_origin
> Bisect info: https://github.com/xupengfe/syzkaller_logs/blob/main/240826_202302_phy_start_cable_test_tdr/bisect_info.log
> bzImage: https://github.com/xupengfe/syzkaller_logs/raw/main/240826_202302_phy_start_cable_test_tdr/bzImage_1ca4237ad9ce29b0c66fe87862f1da54ac56a1e8.tar.gz
> Issue dmesg: https://github.com/xupengfe/syzkaller_logs/blob/main/240826_202302_phy_start_cable_test_tdr/1ca4237ad9ce29b0c66fe87862f1da54ac56a1e8_dmesg.log

Thanks for the report !

This issue has indeed been detected, and is being addressed, see :

https://lore.kernel.org/netdev/20240826134656.94892-1-djahchankoike@gmail.com/

Thanks,

Maxime