RELENG_7 crash
John Baldwin
jhb at freebsd.org
Tue Apr 21 15:12:06 UTC 2009
On Tuesday 21 April 2009 1:25:06 am Mike Tancsa wrote:
> The box has a fairly heavy UDP load. Its RELENG_7 as of today and
> took 3hrs for it to dump core.
>
> Fatal trap 12: page fault while in kernel mode
> cpuid = 1; apic id = 01
> fault virtual address = 0x68
> fault code = supervisor read, page not present
> instruction pointer = 0x20:0xc0637146
> stack pointer = 0x28:0xe766eaac
> frame pointer = 0x28:0xe766eb54
> 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 = 761 (bsnmpd)
> trap number = 12
> panic: page fault
> cpuid = 1
> Uptime: 3h47m43s
> Physical memory: 2036 MB
> Dumping 83 MB: 68 52 36 20 4
>
> (kgdb) bt
> #0 doadump () at pcpu.h:196
> #1 0xc05964d7 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:418
> #2 0xc05967a9 in panic (fmt=Variable "fmt" is not available.
> ) at /usr/src/sys/kern/kern_shutdown.c:574
> #3 0xc07f64ac in trap_fatal (frame=0xe766ea6c, eva=104) at
> /usr/src/sys/i386/i386/trap.c:939
> #4 0xc07f6730 in trap_pfault (frame=0xe766ea6c, usermode=0, eva=104)
> at /usr/src/sys/i386/i386/trap.c:852
> #5 0xc07f70dc in trap (frame=0xe766ea6c)
at /usr/src/sys/i386/i386/trap.c:530
> #6 0xc07db7eb in calltrap () at /usr/src/sys/i386/i386/exception.s:159
> #7 0xc0637146 in sysctl_ifdata (oidp=0xc08816a0, arg1=0xe766ec24,
> arg2=2, req=0xe766eba4) at /usr/src/sys/net/if_mib.c:127
> #8 0xc059fd77 in sysctl_root (oidp=Variable "oidp" is not available.
> ) at /usr/src/sys/kern/kern_sysctl.c:1413
> #9 0xc059ff14 in userland_sysctl (td=0xc5374460, name=0xe766ec14,
> namelen=6, old=0x0, oldlenp=0xbfbf8478, inkernel=0, new=0x0,
> newlen=0, retval=0xe766ec10, flags=0) at
> /usr/src/sys/kern/kern_sysctl.c:1506
> #10 0xc05a0064 in __sysctl (td=0xc5374460, uap=0xe766ecfc) at
> /usr/src/sys/kern/kern_sysctl.c:1443
> #11 0xc07f6a85 in syscall (frame=0xe766ed38) at
> /usr/src/sys/i386/i386/trap.c:1090
> #12 0xc07db850 in Xint0x80_syscall ()
at /usr/src/sys/i386/i386/exception.s:255
> #13 0x00000033 in ?? ()
> Previous frame inner to this frame (corrupt stack?)
> (kgdb)
Can you do 'frame 7' followed by 'l', 'p ifp', and 'p ifp->if_snd'?
--
John Baldwin
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