Date: Sun, 07 Jan 2007 11:18:08 -0400 From: "Marc G. Fournier" <scrappy@freebsd.org> To: Robert Watson <rwatson@FreeBSD.org>, "Marc G. Fournier" <scrappy@freebsd.org> Cc: freebsd-stable@freebsd.org, jhb@FreeBSD.org Subject: Re: Fatal trap 12: page fault while in kernel mode Message-ID: <C806F54DEAC477D155F7FE0E@ganymede.hub.org> In-Reply-To: <20070107140119.M46119@fledge.watson.org> References: <8FF1D577DF1087259D6F71E0@ganymede.hub.org> <20070107140119.M46119@fledge.watson.org>
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Working on upgrading and applying patch right now ... thanks ...
- --On Sunday, January 07, 2007 14:03:41 +0000 Robert Watson=20
<rwatson@FreeBSD.org> wrote:
>
> On Sat, 6 Jan 2007, Marc G. Fournier wrote:
>
>> Just had the following happen on a FreeBSD 6.2-PRERELEASE #7: Sun Dec 17
>> 01:28:52 AST 2006 system ... amd64, HP Proliant, 6G of RAM ... have core if
>> there is information that I can provide out of it ...
>>
>> Fatal trap 12: page fault while in kernel mode
>> cpuid =3D 0; apic id =3D 00
>> fault virtual address =3D 0x18c
>> fault code =3D supervisor read, page not present
>> instruction pointer =3D 0x8:0xffffffff801f9053
>> stack pointer =3D 0x10:0xffffffffb5c78b30
>> frame pointer =3D 0x10:0xffffffffb5c78b60
>> code segment =3D base 0x0, limit 0xfffff, type 0x1b
>> =3D DPL 0, pres 1, long 1, def32 0, gran 1
>> processor eflags =3D resume, IOPL =3D 0
>> current process =3D 5 (thread taskq)
>> trap number =3D 12
>> panic: page fault
>> cpuid =3D 0
>> Uptime: 8d22h25m40s
>>
>> (kgdb) where
>> # 0 doadump () at pcpu.h:172
>> # 1 0xffffffff80203955 in boot (howto=3D260) at
>> /usr/src/sys/kern/kern_shutdown.c:409
>> # 2 0xffffffff80204065 in panic (fmt=3D0xffffff019b667720
>> "X\223f\233\001=C3=BF=C3=BF=C3=BF\020=C2=B5c\233\001=C3=BF=C3=BF=C3=BF") at
>> /usr/src/sys/kern/kern_shutdown.c:565
>> # 3 0xffffffff803287a6 in trap_fatal (frame=3D0xc, =
eva=3D18446742981100074784)
>> # at
>> /usr/src/sys/amd64/amd64/trap.c:660
>> # 4 0xffffffff80328cd8 in trap (frame=3D
>> {tf_rdi =3D 112, tf_rsi =3D -1092609476832, tf_rdx =3D 6, tf_rcx =3D =
3221225730,
>> tf_r8 =3D -1245213424, tf_r9 =3D -1092609476832, tf_rax =3D 1, tf_rbx =3D
>> - -1096874331952, tf_rbp =3D -1245213856, tf_r10 =3D -2142258536, tf_r11 =3D =
0,
>> tf_r12 =3D 4, tf_r13 =3D -1092609476832, tf_r14 =3D 4, tf_r15 =3D 1, =
tf_trapno =3D 12,
>> tf_addr =3D 396, tf_flags =3D -2145197496, tf_err =3D 0, tf_rip =3D =
-2145415085,
>> tf_cs =3D 8, tf_rflags =3D 65538, tf_rsp =3D -1245213888, tf_ss =3D 16}) at
>> /usr/src/sys/amd64/amd64/trap.c:238
>> # 5 0xffffffff80313c6b in calltrap () at
>> /usr/src/sys/amd64/amd64/exception.S:168
>> # 6 0xffffffff801f9053 in _mtx_lock_sleep (m=3D0xffffff009d31f0d0,
>> tid=3D18446742981100074784, opts=3D6, file=3D0xc0000102 <Address 0xc0000102 =
out of
>> bounds>, line=3D-1245213424) at /usr/src/sys/kern/kern_mutex.c:546
>> # 7 0xffffffff8025b1ac in unp_gc (arg=3D0x70, pending=3D-1687783648) at
>> /usr/src/sys/kern/uipc_usrreq.c:1714
>> # 8 0xffffffff8022c314 in taskqueue_run (queue=3D0xffffff0000844800) at
>> /usr/src/sys/kern/subr_taskqueue.c:257
>> # 9 0xffffffff8022d0e7 in taskqueue_thread_loop (arg=3D0x70) at
>> /usr/src/sys/kern/subr_taskqueue.c:376
>> # 10 0xffffffff801e7b76 in fork_exit (callout=3D0xffffffff8022d060
>> <taskqueue_thread_loop>, arg=3D0xffffffff805030d0, =
frame=3D0xffffffffb5c78c50) at
>> /usr/src/sys/kern/kern_fork.c:821
>> # 11 0xffffffff80313fce in fork_trampoline () at
>> /usr/src/sys/amd64/amd64/exception.S:394
>
> This is a NULL pointer dereference in the UNIX domain socket code. John
> Baldwin recently committed a fix for a bug with these symptoms to 7-CURRENT,
> with an MFC planned in the near future. The fix won't make 6.2-RELEASE, but
> assuming it tests out well over the next few weeks, we will cut an errata
> patch/announcement for it. I believe you can pull down his 6-STABLE version
> at:
>
> http://people.FreeBSD.org/~jhb/patches/unp_gc.patch
>
> This same patch is currently in texting on mx1.FreeBSD.org.
>
> (John CC'd)
>
> Robert N M Watson
> Computer Laboratory
> University of Cambridge
- ----
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
Email . scrappy@hub.org MSN . scrappy@hub.org
Yahoo . yscrappy Skype: hub.org ICQ . 7615664
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