linux-kernel - Re: [syzbot] KMSAN: uninit-value in asix_mdio

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Message-ID: <e76e2f18-01ad-0938-6ec1-4eaa42b9b9a2@gmail.com>
Date:   Mon, 20 Dec 2021 00:15:12 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        syzbot <syzbot+f44badb06036334e867a@...kaller.appspotmail.com>
Cc:     davem@...emloft.net, glider@...gle.com, kuba@...nel.org,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        linux@...pel-privat.de, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] KMSAN: uninit-value in asix_mdio_read (2)

On 12/19/21 20:17, Andrew Lunn wrote:
> On Sat, Dec 18, 2021 at 05:03:09PM -0800, syzbot wrote:
>> Hello,
>> 
>> syzbot has tested the proposed patch and the reproducer did not trigger any issue:
>> 
>> Reported-and-tested-by: syzbot+f44badb06036334e867a@...kaller.appspotmail.com
> 
> So it looks like you were right. But maybe ret < sizeof(smsr) would be
> better?
> 

I agree, this looks much cleaner.

Also, the bug you mentioned in previous email is also real, so I will 
prepare a patch series if you haven't fixed it by yourself :)



With regards,
Pavel Skripkin