Date: Wed, 07 Dec 2005 23:09:54 +0100 From: Danilo Asara <danilo.asara@gmail.com> To: hackers@FreeBSD.org Subject: Fatal trap 12: page fault while in kernel mode Message-ID: <1133993394.1426.2.camel@localhost>
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danilo@resolza [~]$ uname -a
FreeBSD resolza.fastwebnet.it 6.0-STABLE FreeBSD 6.0-STABLE #0: Fri
Nov18 11:19:38 CET
root@resolza.fastwebnet.it:/usr/obj/usr/src/sys/RESOLZA i386
danilo@resolza [~]$
root@resolza [/usr/crash]# kgdb kernel.debug.0 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]
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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 = 0x0
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc0500411
stack pointer = 0x28:0xef58fcac
frame pointer = 0x28:0xef58fcdc
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 = 722 (artsd)
trap number = 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
kdb_backtrace(100,c2a83a80,28,ef58fc6c,c) at kdb_backtrace+0x29
panic(c06b2fec,c06d9f5b,0,fffff,c09b) at panic+0x114
trap_fatal(ef58fc6c,0,c2a83a80,c2890bb8,c) at trap_fatal+0x2ca
trap_pfault(ef58fc6c,0,0) at trap_pfault+0x1d7
trap(8,28,28,c2ea9e70,c2a83a80) at trap+0x2fd
calltrap() at calltrap+0x5
--- trap 0xc, eip = 0xc0500411, esp = 0xef58fcac, ebp = 0xef58fcdc ---
kse_release(c2a83a80,ef58fd04,1,0,200292) at kse_release+0x165
syscall(3b,3b,3b,80f2100,81) at syscall+0x2bf
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (383, FreeBSD ELF32, kse_release), eip = 0x287d81af, esp =
0xbf9fef30, ebp = 0xbf9fef8c ---
Uptime: 12h9m20s
Dumping 1023 MB (2 chunks)
chunk 0: 1MB (159 pages) ... ok
chunk 1: 1023MB (261872 pages) 1007 991 975 959 943 927 911 895 879
863 847 831 815 799 783 767 751 735 719 703 687 671 655 639 623 607 591
575 559 543 527 511 495 479 463 447 431 415 399 383 367 351 335 319 303
287 271 255 239 223 207 191 175 159 143 127 111 95 79 63 47 31 15
#0 doadump () at pcpu.h:165
165 pcpu.h: No such file or directory.
in pcpu.h
(kgdb) where
#0 doadump () at pcpu.h:165
#1 0xc05132bf in boot (howto=260)
at /usr/src/sys/kern/kern_shutdown.c:399
#2 0xc0513615 in panic (fmt=0xc06b2fec "%s")
at /usr/src/sys/kern/kern_shutdown.c:555
#3 0xc068d8ca in trap_fatal (frame=0xef58fc6c, eva=0)
at /usr/src/sys/i386/i386/trap.c:831
#4 0xc068d5d7 in trap_pfault (frame=0xef58fc6c, usermode=0, eva=0)
at /usr/src/sys/i386/i386/trap.c:742
#5 0xc068d1ed in trap (frame=
{tf_fs = 8, tf_es = 40, tf_ds = 40, tf_edi = -1024811408, tf_esi =
-1029162368, tf_ebp = -279380772, tf_isp = -279380840, tf_ebx =
-1026066384, tf_edx = -1029162368, tf_ecx = -1026066303, tf_eax = 0,
tf_trapno = 12, tf_err = 0, tf_eip = -1068497903, tf_cs = 32, tf_eflags
= 2687622, tf_esp = -1036728832, tf_ss = 30})
at /usr/src/sys/i386/i386/trap.c:432
#6 0xc067aaca in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#7 0xc0500411 in kse_release (td=0xc2a83a80, uap=0xef58fd04)
at /usr/src/sys/kern/kern_kse.c:428
#8 0xc068dc0f in syscall (frame=
{tf_fs = 59, tf_es = 59, tf_ds = 59, tf_edi = 135209216, tf_esi =
129, tf_ebp = -1080037492, tf_isp = -279380636, tf_ebx = 679326900,
tf_edx = 3, tf_ecx = 31, tf_eax = 383, tf_trapno = 32, tf_err = 2,
tf_eip = 679313839, tf_cs = 51, tf_eflags = 2097810, tf_esp =
-1080037584, tf_ss = 59}) at /usr/src/sys/i386/i386/trap.c:976
#9 0xc067ab1f in Xint0x80_syscall ()
at /usr/src/sys/i386/i386/exception.s:200
#10 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
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