7.0 kernel crash: page fault while in kernel mode
hi,
i'm running
FreeBSD murus 7.0-RELEASE FreeBSD 7.0-RELEASE #0: Mon Mar 3 20:53:07
CET 2008 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/GENERIC i386
today this machine crashed, but lucky me i did get a crash dump. i'm
not a kernel developer so any help would be great in finding out the
reason for the crash.
the machine is running as a firewall with various services (imap,
smtp,dns ...). i'm also using if_bridge/vlans to filter traffic for
internal clients.
thanks for your time
toni
[EMAIL PROTECTED] /usr/obj/usr/src/sys/GENERIC {1027}# kgdb kernel.debug
/var/crash/vmcore.0
[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 = 0xbc
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc078075e
stack pointer = 0x28:0xe5550ab4
frame pointer = 0x28:0xe5550ac4
code segment= base 0x0, limit 0xf, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags= interrupt enabled, resume, IOPL = 0
current process = 950 (apcupsd)
trap number = 12
panic: page fault
cpuid = 0
Uptime: 48d14h37m48s
Physical memory: 946 MB
Dumping 202 MB: 187 171 155 139 123 107 91 75 59 43 27 11
#0 doadump () at pcpu.h:195
195 __asm __volatile(movl %%fs:0,%0 : =r (td));
(kgdb) bt
#0 doadump () at pcpu.h:195
#1 0xc0754457 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
#2 0xc0754719 in panic (fmt=Variable fmt is not available.
) at /usr/src/sys/kern/kern_shutdown.c:563
#3 0xc0a4905c in trap_fatal (frame=0xe5550a74, eva=188) at
/usr/src/sys/i386/i386/trap.c:899
#4 0xc0a492e0 in trap_pfault (frame=0xe5550a74, usermode=0, eva=188) at
/usr/src/sys/i386/i386/trap.c:812
#5 0xc0a49c8c in trap (frame=0xe5550a74) at /usr/src/sys/i386/i386/trap.c:490
#6 0xc0a2fc0b in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#7 0xc078075e in rman_reserve_resource_bound (rm=0x0, start=0, end=3232598804,
count=753, bound=0, flags=590486, dev=0xe5550b2c)
at /usr/src/sys/kern/subr_rman.c:325
#8 0xc0788b72 in kern_select (td=0xc437a420, nd=5, fd_in=0xbfbfecc0,
fd_ou=0x0, fd_ex=0x0, tvp=0xe5550c70)
at /usr/src/sys/kern/sys_generic.c:845
#9 0xc07890de in select (td=0xc437a420, uap=0xe5550cfc) at
/usr/src/sys/kern/sys_generic.c:663
#10 0xc0a49635 in syscall (frame=0xe5550d38) at
/usr/src/sys/i386/i386/trap.c:1035
#11 0xc0a2fc70 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:196
#12 0x0033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb)
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Re: 7.0 kernel crash: page fault while in kernel mode
Toni Schmidbauer wrote:
hi,
i'm running
FreeBSD murus 7.0-RELEASE FreeBSD 7.0-RELEASE #0: Mon Mar 3 20:53:07
CET 2008 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/GENERIC i386
today this machine crashed, but lucky me i did get a crash dump. i'm
not a kernel developer so any help would be great in finding out the
reason for the crash.
the machine is running as a firewall with various services (imap,
smtp,dns ...). i'm also using if_bridge/vlans to filter traffic for
internal clients.
thanks for your time
toni
[EMAIL PROTECTED] /usr/obj/usr/src/sys/GENERIC {1027}# kgdb kernel.debug
/var/crash/vmcore.0
[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 = 0xbc
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc078075e
stack pointer = 0x28:0xe5550ab4
frame pointer = 0x28:0xe5550ac4
code segment= base 0x0, limit 0xf, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags= interrupt enabled, resume, IOPL = 0
current process = 950 (apcupsd)
trap number = 12
panic: page fault
cpuid = 0
Uptime: 48d14h37m48s
Physical memory: 946 MB
Dumping 202 MB: 187 171 155 139 123 107 91 75 59 43 27 11
#0 doadump () at pcpu.h:195
195 __asm __volatile(movl %%fs:0,%0 : =r (td));
(kgdb) bt
#0 doadump () at pcpu.h:195
#1 0xc0754457 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
#2 0xc0754719 in panic (fmt=Variable fmt is not available.
) at /usr/src/sys/kern/kern_shutdown.c:563
#3 0xc0a4905c in trap_fatal (frame=0xe5550a74, eva=188) at
/usr/src/sys/i386/i386/trap.c:899
#4 0xc0a492e0 in trap_pfault (frame=0xe5550a74, usermode=0, eva=188) at
/usr/src/sys/i386/i386/trap.c:812
#5 0xc0a49c8c in trap (frame=0xe5550a74) at /usr/src/sys/i386/i386/trap.c:490
#6 0xc0a2fc0b in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#7 0xc078075e in rman_reserve_resource_bound (rm=0x0, start=0, end=3232598804,
count=753, bound=0, flags=590486, dev=0xe5550b2c)
at /usr/src/sys/kern/subr_rman.c:325
#8 0xc0788b72 in kern_select (td=0xc437a420, nd=5, fd_in=0xbfbfecc0,
fd_ou=0x0, fd_ex=0x0, tvp=0xe5550c70)
at /usr/src/sys/kern/sys_generic.c:845
#9 0xc07890de in select (td=0xc437a420, uap=0xe5550cfc) at
/usr/src/sys/kern/sys_generic.c:663
#10 0xc0a49635 in syscall (frame=0xe5550d38) at
/usr/src/sys/i386/i386/trap.c:1035
#11 0xc0a2fc70 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:196
#12 0x0033 in ?? ()
kern_select() does not call rman_reserve_resource_bound() so ether this
trace is corrupt or you have a RAM error. Note that the IP for this
function (0xc078075e) is a single bit flip from being very close to
kern_select (0xc0788b72), which is what you would expect if kern_select
tried to call an associated function in the same source file but the
address was corrupted in RAM.
Kris
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Re: 7.0 kernel crash: page fault while in kernel mode
At Mon, 21 Apr 2008 19:18:30 +0200, Kris Kennaway wrote: kern_select() does not call rman_reserve_resource_bound() so ether this trace is corrupt or you have a RAM error. Note that the IP for this function (0xc078075e) is a single bit flip from being very close to kern_select (0xc0788b72), which is what you would expect if kern_select tried to call an associated function in the same source file but the address was corrupted in RAM. thanks for the input, i'm going to run memtest86, maybe i've got bad a bad dimm. thanks toni -- If you understand what you're doing, you're | toni at stderror dot at not learning anything. | Toni Schmidbauer -- Anonymous| ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to [EMAIL PROTECTED]
