kern/126089: [panic] Fatal trap 12: page fault while in kernel mode

[Mani chandra]

The following reply was made to PR kern/126089; it has been noted by GNATS.

From: Mani chandra <mchandra at iitk.ac.in>
To: bug-followup at FreeBSD.org, mchandra at iitk.ac.in
Cc:  
Subject: Re: kern/126089: [panic] Fatal trap 12: page fault while in kernel
 mode
Date: Sun, 03 Aug 2008 22:16:50 +0530

 Hi,
     I had another crash today and the following is the backtrace.
 
 Fatal trap 12: page fault while in kernel mode
 cpuid = 1; apic id = 01
 fault virtual address   = 0x810698bc
 fault code              = supervisor read, page not present
 instruction pointer     = 0x20:0xc05dab78
 stack pointer           = 0x28:0xe6e86b98
 frame pointer           = 0x28:0xe6e86bb8
 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         = 858 (gkrellm)
 trap number             = 12
 panic: page fault
 cpuid = 1
 Uptime: 26m3s
 Physical memory: 3573 MB
 Dumping 217 MB: 202 186 170 154 138 122 106 90 74 58 42 26 10
 
 #0  doadump () at pcpu.h:195
 195     pcpu.h: No such file or directory.
         in pcpu.h
 (kgdb) bt
 #0  doadump () at pcpu.h:195
 #1  0xc0579cf1 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
 #2  0xc0579fc4 in panic (fmt=Variable "fmt" is not available.
 ) at /usr/src/sys/kern/kern_shutdown.c:563
 #3  0xc078b144 in trap_fatal (frame=0xe6e86b58, eva=2164693180) at 
 /usr/src/sys/i386/i386/trap.c:899
 #4  0xc078b394 in trap_pfault (frame=0xe6e86b58, usermode=0, 
 eva=2164693180) at /usr/src/sys/i386/i386/trap.c:812
 #5  0xc078bcfa in trap (frame=0xe6e86b58) at 
 /usr/src/sys/i386/i386/trap.c:490
 #6  0xc07736ab in calltrap () at /usr/src/sys/i386/i386/exception.s:139
 #7  0xc05dab78 in brelse (bp=0xc74054a4) at /usr/src/sys/kern/vfs_bio.c:321
 #8  0xc05b2741 in soo_write (fp=0xc6fdeab0, uio=0xe6e86c60, 
 active_cred=0xc7368b00, flags=0, td=0xc7407440)
     at /usr/src/sys/kern/sys_socket.c:103
 #9  0xc05ac085 in dofilewrite (td=0xc7407440, fd=3, fp=0xc6fdeab0, 
 auio=0xe6e86c60, offset=-1, flags=0) at file.h:254
 #10 0xc05ac321 in kern_writev (td=0xc7407440, fd=3, auio=0xe6e86c60) at 
 /usr/src/sys/kern/sys_generic.c:401
 #11 0xc05ac38d in write (td=0xc7407440, uap=0xe6e86cfc) at 
 /usr/src/sys/kern/sys_generic.c:317
 #12 0xc078b6d5 in syscall (frame=0xe6e86d38) at 
 /usr/src/sys/i386/i386/trap.c:1035
 #13 0xc0773710 in Xint0x80_syscall () at 
 /usr/src/sys/i386/i386/exception.s:196
 #14 0x00000033 in ?? ()
 Previous frame inner to this frame (corrupt stack?)