netdev - Re: [PATCH v3 net] net: ipv6: regenerate host route if moved to gc list

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Message-ID: <CAAeHK+xm9ycPbjn=mu8zmbeFtJzWeNR13mD2ttBiokJxzsGQWQ@mail.gmail.com>
Date:   Tue, 25 Apr 2017 18:35:07 +0200
From:   Andrey Konovalov <andreyknvl@...gle.com>
To:     David Ahern <dsa@...ulusnetworks.com>
Cc:     netdev <netdev@...r.kernel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>, mmanning@...cade.com,
        Martin KaFai Lau <kafai@...com>
Subject: Re: [PATCH v3 net] net: ipv6: regenerate host route if moved to gc list

On Tue, Apr 25, 2017 at 5:54 PM, David Ahern <dsa@...ulusnetworks.com> wrote:
> On 4/25/17 6:50 AM, Andrey Konovalov wrote:
>> I've been running syzkaller with your patch and got another report
>> from ip6_pol_route.
>
> In general the existing patch cleans up all of the ipv6 fib kasan and
> WARN_ON traces that were seen?

Before applying your patch I was hitting reports related to fib6 all the time.
I've stopped seeing them for some time after I applied your patch.
However today another one was triggered (the one I sent above).

>
>
>>
>> It happened only once so far and I couldn't reproduce it.
>
> Some similarity in the sense of a ipv4 route in the ipv6 fib. That's
> only going to happen if it hits the dst gc list and then back.
>
> This duplicates what Dmitry reported on March 3rd.