netdev - Re: [PATCH net] net: mld: do not use system

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Message-ID: <YtomWhU9lR3ftEM+@Laptop-X1>
Date:   Fri, 22 Jul 2022 12:23:54 +0800
From:   Hangbin Liu <liuhangbin@...il.com>
To:     Taehee Yoo <ap420073@...il.com>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net] net: mld: do not use system_wq in the mld

On Fri, Jul 22, 2022 at 10:35:52AM +0800, Hangbin Liu wrote:
> > I found this bug while testing another syzbot report.
> > (https://syzkaller.appspot.com/bug?id=ed41eaa4367b421d37aab5dee25e3f4c91ceae93)
> > And I can't find the same case in the syzbot reports list.
> > 
> > I just use some command lines and many kernel debug options such as
> > kmemleak, kasan, lockdep, and others.
> > 
> 
> Hi Taehee,
> 
> I got a similar issue with yours after Eric's 2d3916f31891
> ("ipv6: fix skb drops in igmp6_event_query() and igmp6_event_report()").
> I use force_mld_version=1 and adding a lot of IPv6 address to generate the
> mld reports flood. Here is my reproducer:

BTW, thanks for your fix. With your patch the issue is fixed. Please feel free
to add

Tested-by: Hangbin Liu <liuhangbin@...il.com>

Cheers
Hangbin