Re: PANIC: trap.c

On Monday 16 February 2004 09:37, Jiri Mikulas wrote:
> Robert Watson wrote:
> >On Mon, 16 Feb 2004, Jiri Mikulas wrote:
> >>Hello, just only for info I got this panic on:  FreeBSD 5.2-CURRENT
> >> #1: Mon Feb 16 00:53:39 CET 2004
> >>
> >>I built few kernels from saturday morning to sunday evening and with
> >> all of them i got this panic ..  (my last functional kernel is from
> >> FreeBSD 5.2-CURRENT #0: Mon Feb 9 19:53:47 CET 2004)  Jiri
> >
> >It looks like 'ifp' in ip_output.c is NULL here (the offset of
> > if_hwassist is 0x98).  Are you running with DUMMYNET?  I'm wondering
> > if the recent commit to clean up MT_TAG pseudo-mbufs has a loose end
> > somewhere.  Try backing ouf the following commit locally:
> >
> >mlaier      2004/02/13 11:14:16 PST
> >
> >  FreeBSD src repository
> >
> >  Modified files:
> >    sys/net              bridge.c if_ethersubr.c
> >    sys/netinet          in_proto.c ip_divert.c ip_dummynet.c
> >                         ip_dummynet.h ip_fastfwd.c ip_fw.h
> >                         ip_fw2.c ip_input.c ip_output.c ip_var.h
> >                         tcp_debug.c tcp_input.c
> >    sys/sys              mbuf.h
> >  Added files:
> >    sys/netinet          ip_divert.h
>
> yes I'm runnig DUMMYNET
>
> >Also, it would be quite interesting to see the contents of 'inspect
> > *m' and 'inspect *ro' in stack frame #6.
>
> ~~~cut~~~
> (kgdb) up 6
> #6  0xc05726c8 in ip_output (m=0xc10f7200, opt=0x0, ro=0xc2abab68,
> flags=1, imo=0x0, inp=0x0) at /usr/src/sys/netinet/ip_output.c:983
> 983             sw_csum = m->m_pkthdr.csum_flags & ~ifp->if_hwassist;
> (kgdb) inspect *m
> $1 = {m_hdr = {mh_next = 0x0, mh_nextpkt = 0x0, mh_data = 0xc10f7250
> "E", mh_len = 48, mh_flags = 2, mh_type = 1}, M_dat = {MH = {
>       MH_pkthdr = {rcvif = 0xc27b4000, len = 48, header = 0x14,
> csum_flags = 1, csum_data = 393990, tags = {slh_first = 0x0}}, MH_dat =
> { MH_ext = {ext_buf = 0x1020108---Can't read userspace from dump, or
> kernel process---
>
> (kgdb) inspect *ro
> $2 = {ro_rt = 0x0, ro_dst = {sa_len = 0 '\0', sa_family = 0 '\0',
> sa_data = '\0' <repeats 13 times>}}
> ~~~cut~~~
>
> is it all ?
> thanks
> Jiri

Can you also provide 'args' and '*dummytag' from the same frame?

Thanks in advance.

-- 
Best regards,				| mlaier_at_freebsd.org
Max Laier				| ICQ #67774661
http://pf4freebsd.love2party.net/	| mlaier_at_EFnet