Subject: panic with named on -current (panic: looutput: no header mbuf)
To: None <>
From: Krüger <>
List: current-users
Date: 08/15/2004 00:17:27
Hi folks,

I got a nice panic today, triggered by named, sources are from 14. Aug,
around 18:00 CEST. Everything is fine when I do not enable/try to run named!

Here's a backtrace, I still have netbsd.gdb + netbsd.0.core, just in case
you want some more info.

Script started on Sat Aug 14 23:56:19 2004
root@dsl-217-9-35-195 # uname -a
NetBSD 2.0G NetBSD 2.0G (PLUTO) #3: Sat Aug 14 23:25:06 CEST 2004 i386
root@dsl-217-9-35-195 # gdb netbsd.gdb
GNU gdb 5.3nb1
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386--netbsdelf"...
(gdb) target kcore /var/crash/netbsd.0.core
panic: looutput: no header mbuf
#0  0xc057b000 in ?? ()
(gdb) bt
#0  0xc057b000 in ?? ()
#1  0xc0284df8 in cpu_reboot (howto=256, bootstr=0x0)
    at /cvsroot/src/sys/arch/i386/i386/machdep.c:751
#2  0xc0203529 in panic (fmt=0xc033206c "looutput: no header mbuf")
    at /cvsroot/src/sys/kern/subr_prf.c:242
#3  0xc0248c4d in looutput (ifp=0xc03bdca0, m=0xc0623800, dst=0xc3afbbc4,
    rt=0xc0740084) at /cvsroot/src/sys/net/if_loop.c:201
#4  0xc015a913 in nd6_output (ifp=0xc03bdca0, origifp=0xc03bdca0,
    m0=0xc0623800, dst=0xc3afbbc4, rt0=0xc0740084)
    at /cvsroot/src/sys/netinet6/nd6.c:1896
#5  0xc01554bf in ip6_output (m0=0xc0623800, opt=0x0, ro=0xc3afbbc0, flags=4,
    im6o=0x0, so=0x0, ifpp=0xc3afbc2c)
    at /cvsroot/src/sys/netinet6/ip6_output.c:885
#6  0xc0145338 in icmp6_reflect (m=0xc0623800, off=40)
    at /cvsroot/src/sys/netinet6/icmp6.c:2146
#7  0xc0142311 in icmp6_error (m=0xc0623700, type=1, code=4, param=0)
    at /cvsroot/src/sys/netinet6/icmp6.c:401
#8  0xc0125e31 in udp6_input (mp=0xc3afbdf8, offp=0xc3afbdd0, proto=17)
    at /cvsroot/src/sys/netinet/udp_usrreq.c:456
#9  0xc014fd3e in ip6_input (m=0xc0623700)
    at /cvsroot/src/sys/netinet6/ip6_input.c:752
#10 0xc014f8e8 in ip6intr () at /cvsroot/src/sys/netinet6/ip6_input.c:212
#11 0xc010c2d6 in Xsoftnet ()
---Type <return> to continue, or q <return> to quit---
#12 0xc022358f in sendit (p=0xc2f7e560, s=23, mp=0xc3afbf24, flags=0,
    retsize=0xc3afbf68) at /cvsroot/src/sys/kern/uipc_syscalls.c:538
#13 0xc022340b in sys_sendmsg (l=0xc2efd948, v=0xc3afbf70, retval=0xc3afbf68)
    at /cvsroot/src/sys/kern/uipc_syscalls.c:455
#14 0xc028fa9e in syscall_plain (frame=0xc3afbfa8)
    at /cvsroot/src/sys/arch/i386/i386/syscall.c:161
(gdb) quit
root@dsl-217-9-35-195 # exit
root@dsl-217-9-35-195 # exit

Script done on Sat Aug 14 23:57:47 2004