netdev - Re: kernel BUG at kernel/timer.c:748!

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Message-ID: <CAK6E8=cAOTqOzrzWCG=_wcQkWKS4bKh1HJ0UAH2vJNqvDPh+GQ@mail.gmail.com>
Date:	Sat, 15 Sep 2012 11:16:52 -0700
From:	Yuchung Cheng <ycheng@...gle.com>
To:	Dave Jones <davej@...hat.com>
Cc:	Julian Anastasov <ja@....bg>, netdev@...r.kernel.org
Subject: Re: kernel BUG at kernel/timer.c:748!

On Fri, Sep 14, 2012 at 2:29 PM, Dave Jones <davej@...hat.com> wrote:
> On Wed, Sep 05, 2012 at 11:48:29PM +0300, Julian Anastasov wrote:
>
>  > > kernel BUG at kernel/timer.c:748!
>  > > Call Trace:
>  > >  ? lock_sock_nested+0x8d/0xa0
>  > >  sk_reset_timer+0x1c/0x30
>  > >  ? sock_setsockopt+0x8c/0x960
>  > >  inet_csk_reset_keepalive_timer+0x20/0x30
>  > >  tcp_set_keepalive+0x3d/0x50
>  > >  sock_setsockopt+0x923/0x960
>  > >  ? trace_hardirqs_on_caller+0x16/0x1e0
>  > >  ? fget_light+0x24c/0x520
>  > >  sys_setsockopt+0xc6/0xe0
>  > >  system_call_fastpath+0x1a/0x1f
>  >
>  >      Can this help? In case you see ICMPV6_PKT_TOOBIG...
>  >
>  > [PATCH] tcp: fix possible socket refcount problem for ipv6
>
> I just managed to reproduce this bug on rc5 with this patch,
> so it doesn't seem to help.
Could you post some tcpdump traces?

>
>         Dave
>
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