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Subject: Re: [PATCH v2] net: usb: dm9601: fix uninitialized variable use in
 dm9601_mdio_read
From:   patchwork-bot+netdevbpf@kernel.org
Message-Id: <169699382568.3301.6960021020124970856.git-patchwork-notify@kernel.org>
Date:   Wed, 11 Oct 2023 03:10:25 +0000
References: <20231009-topic-dm9601_uninit_mdio_read-v2-1-f2fe39739b6c@gmail.com>
In-Reply-To: <20231009-topic-dm9601_uninit_mdio_read-v2-1-f2fe39739b6c@gmail.com>
To:     Javier Carrasco <javier.carrasco.cruz@gmail.com>
Cc:     peter@korsgaard.com, davem@davemloft.net, edumazet@google.com,
        kuba@kernel.org, pabeni@redhat.com,
        syzbot+1f53a30781af65d2c955@syzkaller.appspotmail.com,
        netdev@vger.kernel.org, linux-usb@vger.kernel.org,
        linux-kernel@vger.kernel.org
Precedence: bulk

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.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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