kern/121294: [panic] kernel panic pcpu.h or 0x00000000 in ?? ()

[Kevin Downey]

The following reply was made to PR kern/121294; it has been noted by GNATS.

From: Kevin Downey <hiredman at thelastcitadel.com>
To: bug-followup at FreeBSD.org, kirill at niky.net.ua
Cc:  
Subject: Re: kern/121294: [panic] kernel panic pcpu.h or 0x00000000 in ?? ()
Date: Thu, 08 May 2008 23:15:09 -0700

 FreeBSD eskarina.nexus.lan 7.0-STABLE FreeBSD 7.0-STABLE #8: Thu May  8
 01:04:43 PDT 2008     root at eskarina.nexus.lan:/usr/obj/usr/src/sys/ES
 i386
 
 I am not sure if this is the same problem or if the crashdump
 resemblances are merely superficial.
 
  
 Fatal trap 12: page fault while in kernel mode
 cpuid = 1; apic id = 01
 fault virtual address	= 0x4
 fault code		= supervisor read, page not present
 instruction pointer	= 0x20:0xc05967eb
 stack pointer	        = 0x28:0xf6591aa4
 frame pointer	        = 0x28:0xf6591adc
 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		= 7079 (top)
 trap number		= 12
 panic: page fault
 cpuid = 1
 Uptime: 5h10m6s
 Physical memory: 2013 MB
 Dumping 212 MB: 197 181 165 149 133 117 101 85 69 53 37 21 5
 
 #0  doadump () at pcpu.h:195
 195		__asm __volatile("movl %%fs:0,%0" : "=r" (td));
 (kgdb) where
 #0  doadump () at pcpu.h:195
 #1  0xc054e308 in boot (howto=260)
 at /usr/src/sys/kern/kern_shutdown.c:418
 #2  0xc054e5db in panic (fmt=Variable "fmt" is not available.
 ) at /usr/src/sys/kern/kern_shutdown.c:572
 #3  0xc06f4bb4 in trap_fatal (frame=0xf6591a64, eva=4)
 at /usr/src/sys/i386/i386/trap.c:899
 #4  0xc06f4e04 in trap_pfault (frame=0xf6591a64, usermode=0, eva=4)
 at /usr/src/sys/i386/i386/trap.c:812
 #5  0xc06f5736 in trap (frame=0xf6591a64)
 at /usr/src/sys/i386/i386/trap.c:490
 #6  0xc06dd04b in calltrap () at /usr/src/sys/i386/i386/exception.s:139
 #7  0xc05967eb in b_to_q (src=0xf6591b29 "1\033[11;61H4.17\033[12;51H1
 \033[12;58H4 14.70\033[13;22H51\033[13;44HCPU0  \033[13;58H1 13.09
 \033[1�Zv�", amount=1, clistp=0xcfaa9c38)
 at /usr/src/sys/kern/tty_subr.c:104
 #8  0xc0591997 in ttwrite (tp=0xcfaa9c00, uio=0xf6591c60, flag=0)
 at /usr/src/sys/kern/tty.c:2182
 #9  0xc05956ff in ptswrite (dev=0xd11cb500, uio=0xf6591c60, flag=0) at
 linedisc.h:107
 #10 0xc0519c85 in giant_write (dev=0xd11cb500, uio=0xf6591c60, ioflag=0)
 at /usr/src/sys/kern/kern_conf.c:437
 #11 0xc04f5c03 in devfs_write_f (fp=0xd1236750, uio=0xf6591c60,
 cred=0xd023ed00, flags=0, td=0xd110eaa0)
 at /usr/src/sys/fs/devfs/devfs_vnops.c:1307
 #12 0xc0581e15 in dofilewrite (td=0xd110eaa0, fd=1, fp=0xd1236750,
 auio=0xf6591c60, offset=-1, flags=0) at file.h:254
 #13 0xc05820b1 in kern_writev (td=0xd110eaa0, fd=1, auio=0xf6591c60)
 at /usr/src/sys/kern/sys_generic.c:401
 #14 0xc058211d in write (td=0xd110eaa0, uap=0xf6591cfc)
 at /usr/src/sys/kern/sys_generic.c:317
 #15 0xc06f512c in syscall (frame=0xf6591d38)
 at /usr/src/sys/i386/i386/trap.c:1035
 #16 0xc06dd0b0 in Xint0x80_syscall ()
 at /usr/src/sys/i386/i386/exception.s:196
 #17 0x00000033 in ?? ()
 Previous frame inner to this frame (corrupt stack?)