Date: Mon, 22 Nov 2004 14:25:52 -0800 From: Sean McNeil <sean@mcneil.com> To: current@freebsd.org Subject: crash in natd again Message-ID: <1101162352.4774.7.camel@server.mcneil.com>
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This is on an amd64 machine. I though that setting
dumpdev=3D"AUTO"
in /etc/rc.conf was sufficient to get a crash dump, but it didn't work.
I'm adding
dumpon_enable=3D"YES"
savecore_enable=3D"YES"
now. Please let me know if there is anything else I need to set.
The information I can get is:
Nov 22 13:47:27 server kernel: Fatal trap 12: page fault while in kernel mo=
de
Nov 22 13:47:27 server kernel: fault virtual address =3D 0x18
Nov 22 13:47:27 server kernel: fault code =3D supervisor read=
, page
not present
Nov 22 13:47:27 server kernel: instruction pointer =3D 0x8:0xffffffff8=
0357980Nov 22 13:47:27 server kernel: stack pointer =3D 0x10:0xf=
fffffffb41c5620
Nov 22 13:47:27 server kernel: frame pointer =3D 0x10:0xffffffff=
b41c5680
Nov 22 13:47:27 server kernel: code segment =3D base 0x0, limit=
0xfffff, type 0x1b
Nov 22 13:47:27 server kernel: =3D DPL 0, pres 1, long 1, def32 0, gran 1
Nov 22 13:47:27 server kernel: processor eflags =3D interrupt enabled, resu=
me, IOPL =3D 0
Nov 22 13:47:27 server kernel: current process =3D 215 (natd)
Nov 22 13:47:27 server kernel: trap number =3D 12
Nov 22 13:47:27 server kernel: panic: page fault
Nov 22 13:47:27 server kernel: KDB: enter: panic
uname is
FreeBSD server.mcneil.com 6.0-CURRENT FreeBSD 6.0-CURRENT #5: Sun Nov 21
00:33:27 PST 2004 root@server.mcneil.com:/usr/obj/usr/src/sys/AMD64
amd64
(gdb) l *0xffffffff80357980
0xffffffff80357980 is in m_copym (/usr/src/sys/kern/uipc_mbuf.c:373).
368 MBUF_CHECKSLEEP(wait);
369 if (off =3D=3D 0 && m->m_flags & M_PKTHDR)
370 copyhdr =3D 1;
371 while (off > 0) {
372 KASSERT(m !=3D NULL, ("m_copym, offset > size of
mbuf chain"));
373 if (off < m->m_len)
374 break;
375 off -=3D m->m_len;
376 m =3D m->m_next;
377 }
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