Date: Sat, 4 Jun 2005 02:10:32 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Palle Girgensohn <girgen@pingpong.net> Cc: Brendan White <bmwt@caida.org>, freebsd-stable@freebsd.org Subject: Re: Repeatable crash with 5.4-p1-RELEASE and SMP Message-ID: <20050604061031.GA8643@xor.obsecurity.org> In-Reply-To: <2032FF2A928A89651F1C7843@rambutan.pingpong.net> References: <2032FF2A928A89651F1C7843@rambutan.pingpong.net>
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On Sat, Jun 04, 2005 at 03:48:04AM +0200, Palle Girgensohn wrote:
> Here's the dump. Anything else I shall extract, please just ask.
>=20
> # kgdb kernel.debug /misc/crash/vmcore.11
> [GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.s=
o:=20
> Undefined symbol "ps_pglobal_lookup"]
> GNU gdb 6.1.1 [FreeBSD]
> Copyright 2004 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=20
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for detail=
s.
> This GDB was configured as "amd64-marcel-freebsd".
> #0 doadump () at pcpu.h:167
> 167 __asm __volatile("movq %%gs:0,%0" : "=3Dr" (td));
> (kgdb) backtrace
> #0 doadump () at pcpu.h:167
> #1 0x0000000000000000 in ?? ()
> #2 0xffffffff80341267 in boot (howto=3D260) at=20
> /usr/src/sys/kern/kern_shutdown.c:410
> #3 0xffffffff80341ac6 in panic (fmt=3D0xffffff007b76d000 "??x{") at=20
> /usr/src/sys/kern/kern_shutdown.c:566
> #4 0xffffffff804f0f52 in trap_fatal (frame=3D0xc, eva=3D1844674297626930=
7904)
> at /usr/src/sys/amd64/amd64/trap.c:639
> #5 0xffffffff804f11ef in trap_pfault (frame=3D0xffffffffb1d229b0, usermo=
de=3D0)
> at /usr/src/sys/amd64/amd64/trap.c:562
> #6 0xffffffff804f1457 in trap (frame=3D
> {tf_rdi =3D -1097427517200, tf_rsi =3D -1097440243712, tf_rdx =3D 10=
56,=20
> tf_rcx =3D 0, tf_r8 =3D 0, tf_r9 =3D 0, tf_r
> ax =3D 1056, tf_rbx =3D 0, tf_rbp =3D -1098069766144, tf_r10 =3D 45035996=
27366400,=20
> tf_r11 =3D 3392, tf_r12 =3D 4, tf_r13 =3D
> 4, tf_r14 =3D -1099313881192, tf_r15 =3D -1097364452848, tf_trapno =3D 12=
,=20
> tf_addr =3D 136, tf_flags =3D -1099313881192
> , tf_err =3D 0, tf_rip =3D -2144020582, tf_cs =3D 8, tf_rflags =3D 66050,=
tf_rsp =3D=20
> -1311626640, tf_ss =3D 0})
> at /usr/src/sys/amd64/amd64/trap.c:341
> #7 0xffffffff804deb0b in calltrap () at=20
> /usr/src/sys/amd64/amd64/exception.S:171
> #8 0xffffff007c3900f0 in ?? ()
> #9 0xffffff007b76d000 in ?? ()
Is your kernel built with -O2, or -O? There are a lot of bogus stack
frames here, which suggest the former.
Kris
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