Date: Mon, 23 Apr 2007 13:19:00 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Michael Proto <mike@jellydonut.org> Cc: freebsd-stable@freebsd.org Subject: Re: 6.2-STABLE (i386) Repeating crash (supervisor read, page not present) Message-ID: <20070423171900.GA92231@xor.obsecurity.org> In-Reply-To: <462CE8FE.8060807@jellydonut.org> References: <462CA594.5000904@tomjudge.com> <20070423155728.GC1006@xor.obsecurity.org> <462CE8FE.8060807@jellydonut.org>
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On Mon, Apr 23, 2007 at 01:12:30PM -0400, Michael Proto wrote: > Kris Kennaway wrote: > > On Mon, Apr 23, 2007 at 01:24:52PM +0100, Tom Judge wrote: > >> Hi, > >> > >> Recently I have noticed that one of our Dell PE1950's has been crashing > >> a lot with the following reason "supervisor read, page not present". > >> > >> The system runs 6.2 Release under i386. > >> > >> I have attached 2 back traces, and I still have both cores if any more > >> information is required. Any light that can be shed on this problem > >> would be greatly appreciated. > >> > >> Tom > >> > >> =========== > >> > >> uname -a > >> FreeBSD narthex.mintel.co.uk 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Mon > >> Apr 2 20:13:11 BST 2007 > >> root@bob.mintel.co.uk:/usr/obj/usr/src/sys/PE1950 i386 > >> > >> > >> ## Core 1 > >> > >> root@narthex '13:14:47' '/home/london/tj' > >>> $ kgdb /usr/obj/usr/src/sys/PE1950/kernel.debug /var/crash/vmcore.1 > >> [GDB will not be able to debug user-mode threads: > >> /usr/lib/libthread_db.so: 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 > >> 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-marcel-freebsd". > >> > >> Unread portion of the kernel message buffer: > >> > >> > >> Fatal trap 12: page fault while in kernel mode > >> cpuid = 0; apic id = 00 > >> fault virtual address = 0x100005c > >> fault code = supervisor read, page not present > >> instruction pointer = 0x20:0xc05df61f > >> stack pointer = 0x28:0xe4f63c30 > >> frame pointer = 0x28:0xe4f63c90 > >> code segment = base 0x0, limit 0xfffff, type 0x1b > >> = DPL 0, pres 1, def32 1, gran 1 > >> processor eflags = interrupt enabled, resume, IOPL = 0 > >> current process = 12 (swi1: net) > >> trap number = 12 > >> panic: page fault > >> cpuid = 0 > >> Uptime: 1h25m33s > >> Dumping 2047 MB (2 chunks) > >> chunk 0: 1MB (159 pages) ... ok > >> chunk 1: 2047MB (523944 pages) 2031 2015 1999 1983 1967 1951 1935 1919 > >> 1903 1887 > >> <7>arp_rtrequest: bad gateway 172.31.1.1 (!AF_LINK) > >> <7>arp_rtrequest: bad gateway 172.31.0.1 (!AF_LINK) > > > > You might be hitting a bug in an obscure code path because of the > > above errors. I'm CC'ing someone who might be able to help. > > > > Kris > > > > Bear in mind that a recent "urgent" firmware update was released by Dell > last week for 1950, 1955, and 2950 systems that is supposed to fix some > data-corruption issues related to dual-core processors. I don't know if > this problem is a symptom of that, but it strongly suggested to apply > the firmware update regardless. Thanks, this could be very relevant. Kris
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