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Date:      Sat, 28 Aug 1999 12:18:38 -0400 (EDT)
From:      Larry Lile <lile@stdio.com>
To:        hackers@freebsd.org
Subject:   Panic in pmap_remove_pages on 4.0-current
Message-ID:  <Pine.BSF.4.05.9908281208080.11385-100000@heathers.stdio.com>

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Anybody seen this before?  I was building gtk12 in /usr/ports which
died with a sig 11.  I restarted it and it panic'd sometime later.
Crash and kernel file available on  anonymous ftp at
ftp://chaos.stdio.com/pub/crash.


anarchy# gdb -k /var/crash/kernel.0 -c /var/crash/vmcore.0
GNU gdb 4.18
Copyright 1998 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-unknown-freebsd"...
IdlePTD 3018752
initial pcb at 271c20
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0xc15d7ff0
fault code              = supervisor write, page not present
instruction pointer     = 0x8:0xc020ff38
stack pointer           = 0x10:0xc8d95ef0
frame pointer           = 0x10:0xc8d95f00
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         = 31445 (sh)
interrupt mask          = net bio cam
trap number             = 12
panic: page fault

syncing disks... 11 done

dumping to dev (13,196609), offset 0
dump 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112
111 110 109 1
08 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87
86 85 84 83
82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58
57 56 55 54
 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30
29 28 27 26 2
5 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
---
#0  boot (howto=256) at ../../kern/kern_shutdown.c:291
291                     dumppcb.pcb_cr3 = rcr3();
(kgdb) bt
#0  boot (howto=256) at ../../kern/kern_shutdown.c:291
#1  0xc0144331 in panic (fmt=0xc02472cf "page fault")
    at ../../kern/kern_shutdown.c:515
#2  0xc021227a in trap_fatal (frame=0xc8d95eb0, eva=3244130288)
    at ../../i386/i386/trap.c:907
#3  0xc0211f2d in trap_pfault (frame=0xc8d95eb0, usermode=0,
eva=3244130288)
    at ../../i386/i386/trap.c:800
#4  0xc0211b6f in trap (frame={tf_fs = 16, tf_es = 16, tf_ds = 16, tf_edi
= 0,
      tf_esi = -1066564500, tf_ebp = -925278464, tf_isp = -925278500,
      tf_ebx = -1066592668, tf_edx = -943206164, tf_ecx = -1050837008,
      tf_eax = -1066564500, tf_trapno = 12, tf_err = 2, tf_eip =
-1071579336,
      tf_cs = 8, tf_eflags = 66182, tf_esp = -943206272, tf_ss = 0})
    at ../../i386/i386/trap.c:426
#5  0xc020ff38 in pmap_remove_pages (pmap=0xc7c7d0e4, sva=0,
eva=3217022976)
    at ../../i386/i386/pmap.c:2981
#6  0xc013dcdf in exit1 (p=0xc8d89ba0, rv=0) at ../../kern/kern_exit.c:219
#7  0xc013daf0 in exit1 (p=0xc8d89ba0, rv=17) at
../../kern/kern_exit.c:106
#8  0xc02124be in syscall (frame={tf_fs = 47, tf_es = 47, tf_ds = 47,
      tf_edi = 1, tf_esi = -1077945183, tf_ebp = -1077948100,
      tf_isp = -925278252, tf_ebx = 1, tf_edx = 0, tf_ecx = 135127040,
      tf_eax = 1, tf_trapno = 12, tf_err = 2, tf_eip = 134653456, tf_cs =
31,
      tf_eflags = 642, tf_esp = -1077948180, tf_ss = 47})
    at ../../i386/i386/trap.c:1056
#9  0xc02041a6 in Xint0x80_syscall ()
Cannot access memory at address 0xbfbfd13c.
(kgdb) 


Larry Lile
lile@stdio.com



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