netdev - Re: [PATCH v2] net: usb: dm9601: fix uninitialized variable use in dm9601_mdio

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Date: Wed, 11 Oct 2023 03:10:25 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Javier Carrasco <javier.carrasco.cruz@...il.com>
Cc: peter@...sgaard.com, davem@...emloft.net, edumazet@...gle.com,
 kuba@...nel.org, pabeni@...hat.com,
 syzbot+1f53a30781af65d2c955@...kaller.appspotmail.com,
 netdev@...r.kernel.org, linux-usb@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net: usb: dm9601: fix uninitialized variable use in
 dm9601_mdio_read

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Tue, 10 Oct 2023 00:26:14 +0200 you wrote:
> syzbot has found an uninit-value bug triggered by the dm9601 driver [1].
> 
> This error happens because the variable res is not updated if the call
> to dm_read_shared_word returns an error. In this particular case -EPROTO
> was returned and res stayed uninitialized.
> 
> This can be avoided by checking the return value of dm_read_shared_word
> and propagating the error if the read operation failed.
> 
> [...]

Here is the summary with links:
  - [v2] net: usb: dm9601: fix uninitialized variable use in dm9601_mdio_read
    https://git.kernel.org/netdev/net/c/8f8abb863fa5

You are awesome, thank you!
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