netdev - Re: Repeatable inet6_dump_fib crash in stock 4.12.0-rc4+

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]

Date:   Wed, 14 Jun 2017 16:25:44 -0600
From:   David Ahern <dsahern@...il.com>
To:     Ben Greear <greearb@...delatech.com>,
        Cong Wang <xiyou.wangcong@...il.com>
Cc:     Eric Dumazet <eric.dumazet@...il.com>,
        netdev <netdev@...r.kernel.org>
Subject: Re: Repeatable inet6_dump_fib crash in stock 4.12.0-rc4+

On 6/14/17 4:23 PM, Ben Greear wrote:
> On 06/13/2017 07:27 PM, David Ahern wrote:
> 
>> Let's try a targeted debug patch. See attached
> 
> I had to change it to pr_err so it would go to our serial console
> since the system locked hard on crash,
> and that appears to be enough to change the timing where we can no longer
> reproduce the problem.


ok, let's figure out which one is doing that. There are 3 debug
statements. I suspect fib6_del_route is the one setting the state to
FWS_U. Can you remove the debug prints in fib6_repair_tree and
fib6_walk_continue and try again?