netdev - Re: KMSAN: uninit-value in can

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <82b02a62-51ff-4568-c33d-90223a2aed86@hartkopp.net>
Date:   Tue, 3 Dec 2019 11:37:58 +0100
From:   Oliver Hartkopp <socketcan@...tkopp.net>
To:     Marc Kleine-Budde <mkl@...gutronix.de>,
        Eric Dumazet <eric.dumazet@...il.com>,
        syzbot <syzbot+b02ff0707a97e4e79ebb@...kaller.appspotmail.com>,
        davem@...emloft.net, glider@...gle.com, linux-can@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: KMSAN: uninit-value in can_receive

No. I have analyzed several solutions which turn out to be either unsafe 
in processing or need some changes in af_packet :-(

I'm currently very busy @work but will come up with a discussion until 
end of this week.

There is no big pressure as the problem is more unpleasant than causing 
a real problem right now.

Best regards,
Oliver

On 03/12/2019 11.09, Marc Kleine-Budde wrote:
> On 11/20/19 9:10 PM, Oliver Hartkopp wrote:
> [...]
>> So the KMSAN detection was right at the end :-(
>>
>> I'll take a closer look to enable PF_PACKET to send CAN frames again
>> which will fix up the entire  problem.
> 
> I'm going to send a pull request today. Do you already have a fix for this?
> 
> regards,
> Marc
>