Re: panic: tcp_input: TCPS_LISTEN in netinet/tcp_input.c:2370

Arjan,

This panic is different from the one you experienced on stable.
This panic is from the tcp_input() path.

The panic you saw was from the tcp_output()->m_copym() path,
which is likely the result of attempting to pull more data out 
of the snd buffer than is present there. I am pretty sure the 
panic you saw is TCP SACK related, but without a core dump 
(a dump of the SACK state), it would be impossible to fix the 
problem you saw.

mohan

--- Arjan Van Leeuwen <avleeuwen_at_gmail.com> wrote:

> On Mon, 20 Dec 2004 22:52:31 +0100, Peter Holm <peter_at_holm.cc> wrote:
> > On Mon, Dec 20, 2004 at 10:16:00PM +0100, Andre Oppermann wrote:
> > > Peter Holm wrote:
> > > >On Mon, Dec 20, 2004 at 09:11:46PM +0100, Andre Oppermann wrote:
> > > >
> > > >>Peter Holm wrote:
> > > >>
> > > >>>During stress test with GENERIC HEAD from Dec 20 12:18 UTC I got:
> > > >>>
> > > >>>panic(c08374d0,8,c08f46e0,c1523170,3e0) at panic+0x190
> > > >>>tcp_input(c2877900,14,2,c082b363,246) at tcp_input+0x2689
> > > >>>ip_input(c2877900,18,c091a0b8,cbc7fcf4,c0681867) at ip_input+0xd6
> > > >>>netisr_processqueue(c154a080,c154c180,c1523170,cbc7fd1c,c05ffa66)
> > > >>>   at netisr_processqueue+0xf
> > > >>>swi_net(0,0,0,c1554bd0,0) at swi_net+0x8b
> > > >>>ithread_loop(c154c180,cbc7fd48,c154c180,c05ff8c8,0) at
> > > >>>ithread_loop+0x19e
> > > >>>fork_exit(c05ff8c8,c154c180,cbc7fd48) at fork_exit+0x7e
> > > >>>fork_trampoline() at fork_trampoline+0x8
> > > >>>
> > > >>>http://www.holm.cc/stress/log/cons96.html
> > > >>
> > > >>Interesting.  Can you specify what kind of test was running at the
> > > >>time of panic?
> > > >>
> > > >
> > > >The tests from http://www.holm.cc/stress/src/stress.tgz
> > >
> > > Can you find out which of those test was doing the connect and listen?
> > >
> > 
> > That would be the "net" test.
> > 
> > > >Let me know if you need any more info or gdb output.
> > >
> > > Yes, please give *th, *inp and *so as well.
> > >
> > 
> > I've updated http://www.holm.cc/stress/log/cons96.html
> 
> This panic was also mentioned several times on stable_at_ (with
> 5.3-RELEASE). I was unable to get a kernel dump when I posted to
> stable, but I hope it can be fixed now that Peter has all the info!
> 
> Best regards,
> 
> Arjan
> 
> > 
> > --
> > Peter Holm
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