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Date:      Mon, 15 Nov 2004 14:01:48 -0800
From:      Sean McNeil <sean@mcneil.com>
To:        current@freebsd.org
Subject:   natd panics are back
Message-ID:  <1100556108.3025.1.camel@server.mcneil.com>

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This was fixed a while ago and now it has made its way back into
current:

server# uname -a
FreeBSD server.mcneil.com 6.0-CURRENT FreeBSD 6.0-CURRENT #58: Mon Nov 15 0=
8:40:01 PST 2004     root@server.mcneil.com:/usr/obj/usr/src/sys/AMD64  amd=
64

Nov 15 13:56:16 server kernel: Fatal trap 12: page fault while in kernel mo=
de
Nov 15 13:56:16 server kernel: fault virtual address    =3D 0x18
Nov 15 13:56:16 server kernel: fault code               =3D supervisor read=
, page
not present
Nov 15 13:56:16 server kernel: instruction pointer      =3D 0x8:0xffffffff8=
0354810Nov 15 13:56:16 server kernel: stack pointer            =3D 0x10:0xf=
fffffffb1c71620
Nov 15 13:56:16 server kernel: frame pointer            =3D 0x10:0xffffffff=
b1c71680
Nov 15 13:56:16 server kernel: code segment             =3D base 0x0, limit=
 0xfffff, type 0x1b
Nov 15 13:56:16 server kernel: =3D DPL 0, pres 1, long 1, def32 0, gran 1
Nov 15 13:56:16 server kernel: processor eflags =3D interrupt enabled, resu=
me, IOPL =3D 0
Nov 15 13:56:16 server kernel: current process          =3D 212 (natd)
Nov 15 13:56:16 server kernel: trap number              =3D 12
Nov 15 13:56:16 server kernel: panic: page fault
Nov 15 13:56:16 server kernel: KDB: enter: panic


(gdb) l *0xffffffff80354810
0xffffffff80354810 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 mb=
uf 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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