Re: PANIC: trap.c

From: Max Laier (max_at_love2party.net)
Date: 02/16/04

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    To: Jiri Mikulas <konfer@mikulas.com>, Robert Watson <rwatson@freebsd.org>
Date: Mon, 16 Feb 2004 11:19:01 +0100

    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@freebsd.org
Max Laier				| ICQ #67774661
http://pf4freebsd.love2party.net/	| mlaier@EFnet
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