From: Dave Jones <davej@redhat.com>
To: Yuchung Cheng <ycheng@google.com>
Cc: Julian Anastasov <ja@ssi.bg>, netdev@vger.kernel.org
Subject: Re: kernel BUG at kernel/timer.c:748!
Date: Wed, 19 Sep 2012 17:10:59 -0400 [thread overview]
Message-ID: <20120919211059.GA10985@redhat.com> (raw)
In-Reply-To: <CAK6E8=cAOTqOzrzWCG=_wcQkWKS4bKh1HJ0UAH2vJNqvDPh+GQ@mail.gmail.com>
On Sat, Sep 15, 2012 at 11:16:52AM -0700, Yuchung Cheng wrote:
> On Fri, Sep 14, 2012 at 2:29 PM, Dave Jones <davej@redhat.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?
It's likely that there aren't any packets. The fuzzer isn't smart
enough (yet) to do anything too clever to the sockets it creates.
More likely is that this is some race where thread A is doing a setsockopt
while thread B is doing a tear-down of the same socket.
Dave
next prev parent reply other threads:[~2012-09-19 21:11 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-05 4:35 kernel BUG at kernel/timer.c:748! Dave Jones
2012-09-05 16:04 ` Lin Ming
2012-09-05 16:37 ` Yuchung Cheng
2012-09-05 17:08 ` Dave Jones
2012-09-05 21:18 ` Jerry Chu
2012-09-05 20:48 ` Julian Anastasov
2012-09-14 21:29 ` Dave Jones
2012-09-15 18:16 ` Yuchung Cheng
2012-09-19 21:10 ` Dave Jones [this message]
2012-09-19 22:01 ` Eric Dumazet
2012-09-20 2:02 ` Dave Jones
2012-09-24 15:39 ` Dave Jones
2012-09-24 16:34 ` Eric Dumazet
2012-09-24 17:00 ` Eric Dumazet
2012-09-24 17:11 ` Dave Jones
2012-09-24 17:31 ` Eric Dumazet
2012-09-24 18:11 ` Dave Jones
2012-09-24 20:53 ` David Miller
2012-09-24 20:53 ` David Miller
2012-09-24 21:01 ` Eric Dumazet
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