Bug 126821

Received the following error working in KDE, as this is probably not associated with KDE.

Error:

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address    = 0x9000a
fault code            = supervisor read, page not present
instruction pointer   = 0x20:0xc053a619
stack pointer         = 0x28:0xe700f708
frame pointer         = 0x28:0xe700f734
code segment          = base rx0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process       = 96412 (kdeinit)
trap number           = 12
panic: page fault
cpuid = 0
Uptime: 3d7h31m52s
Physical memory: 1007 MB
Dumping 206 MB: 191 175 159 143 127 111 95 (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  79 (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  (CTRL-C to abort)  63 47 31 15

	
Additional Information:


[root@zingel /boot/kernel]# kgdb  -v /boot/kernel/kernel /var/crash/vmcore.2
kgdb: core file: /var/crash/vmcore.2
kgdb: kernel image: /boot/kernel/kernel
kgdb: kvm_read:
kgdb: kvm_read:
[GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
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This GDB was configured as "i386-marcel-freebsd".
Cannot access memory at address 0xc1842fe4
(kgdb) where
#0  sched_switch (td=0xc467a210, newtd=0xc53d0a50, flags=1) at /usr/src/sys/kern/sched_4bsd.c:928
#1  0xc0593c76 in mi_switch (flags=Variable "flags" is not available.
) at /usr/src/sys/kern/kern_synch.c:442
#2  0xc05b999b in sleepq_switch (wchan=Variable "wchan" is not available.
) at /usr/src/sys/kern/subr_sleepqueue.c:478
#3  0xc05b9c3a in sleepq_catch_signals (wchan=0xc07be698) at /usr/src/sys/kern/subr_sleepqueue.c:414
#4  0xc05ba399 in sleepq_timedwait_sig (wchan=0xc07be698) at /usr/src/sys/kern/subr_sleepqueue.c:612
#5  0xc0554f50 in _cv_timedwait_sig (cvp=0xc07be698, lock=0xc07be680, timo=2001) at /usr/src/sys/kern/kern_condvar.c:369
#6  0xc05c063f in kern_select (td=0xc467a210, nd=11, fd_in=0x2980d840, fd_ou=0x2980d9c4, fd_ex=0x2980db48, tvp=0xe6f87c70)
    at /usr/src/sys/kern/sys_generic.c:786
#7  0xc05c084e in select (td=0xc467a210, uap=0xe6f87cfc) at /usr/src/sys/kern/sys_generic.c:663
#8  0xc070d645 in syscall (frame=0xe6f87d38) at /usr/src/sys/i386/i386/trap.c:1035
#9  0xc06f3c80 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:196
#10 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb)  info threads
* 1 Thread 100055 (PID=96403: kdeinit)  sched_switch (td=0xc467a210, newtd=0xc53d0a50, flags=1) at /usr/src/sys/kern/sched_4bsd.c:928
(kgdb) backtrace
#0  sched_switch (td=0xc467a210, newtd=0xc53d0a50, flags=1) at /usr/src/sys/kern/sched_4bsd.c:928
#1  0xc0593c76 in mi_switch (flags=Variable "flags" is not available.
) at /usr/src/sys/kern/kern_synch.c:442
#2  0xc05b999b in sleepq_switch (wchan=Variable "wchan" is not available.
) at /usr/src/sys/kern/subr_sleepqueue.c:478
#3  0xc05b9c3a in sleepq_catch_signals (wchan=0xc07be698) at /usr/src/sys/kern/subr_sleepqueue.c:414
#4  0xc05ba399 in sleepq_timedwait_sig (wchan=0xc07be698) at /usr/src/sys/kern/subr_sleepqueue.c:612
#5  0xc0554f50 in _cv_timedwait_sig (cvp=0xc07be698, lock=0xc07be680, timo=2001) at /usr/src/sys/kern/kern_condvar.c:369
#6  0xc05c063f in kern_select (td=0xc467a210, nd=11, fd_in=0x2980d840, fd_ou=0x2980d9c4, fd_ex=0x2980db48, tvp=0xe6f87c70)
    at /usr/src/sys/kern/sys_generic.c:786
#7  0xc05c084e in select (td=0xc467a210, uap=0xe6f87cfc) at /usr/src/sys/kern/sys_generic.c:663
#8  0xc070d645 in syscall (frame=0xe6f87d38) at /usr/src/sys/i386/i386/trap.c:1035
#9  0xc06f3c80 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:196
#10 0x00000033 in ?? ()
(kgdb) up 0
#0  sched_switch (td=0xc467a210, newtd=0xc53d0a50, flags=1) at /usr/src/sys/kern/sched_4bsd.c:928
928             if (td->td_flags & TDF_IDLETD)
(kgdb) list
923                             PMC_SWITCH_CONTEXT(td, PMC_FN_CSW_IN);
924     #endif
925             }
926
927     #ifdef SMP
928             if (td->td_flags & TDF_IDLETD)
929                     idle_cpus_mask |= PCPU_GET(cpumask);
930     #endif
931             sched_lock.mtx_lock = (uintptr_t)td;
932             td->td_oncpu = PCPU_GET(cpuid);
(kgdb) up
#2  0xc05b999b in sleepq_switch (wchan=Variable "wchan" is not available.
) at /usr/src/sys/kern/subr_sleepqueue.c:478
478             mi_switch(SW_VOL, NULL);
(kgdb) up
#3  0xc05b9c3a in sleepq_catch_signals (wchan=0xc07be698) at /usr/src/sys/kern/subr_sleepqueue.c:414
414                             sleepq_switch(wchan);
(kgdb) up
#4  0xc05ba399 in sleepq_timedwait_sig (wchan=0xc07be698) at /usr/src/sys/kern/subr_sleepqueue.c:612
612             rcatch = sleepq_catch_signals(wchan);
(kgdb) up
#5  0xc0554f50 in _cv_timedwait_sig (cvp=0xc07be698, lock=0xc07be680, timo=2001) at /usr/src/sys/kern/kern_condvar.c:369
369             rval = sleepq_timedwait_sig(cvp);
(kgdb) up
#6  0xc05c063f in kern_select (td=0xc467a210, nd=11, fd_in=0x2980d840, fd_ou=0x2980d9c4, fd_ex=0x2980db48, tvp=0xe6f87c70)
    at /usr/src/sys/kern/sys_generic.c:786
786                     error = cv_timedwait_sig(&selwait, &sellock, timo);
(kgdb) up
#7  0xc05c084e in select (td=0xc467a210, uap=0xe6f87cfc) at /usr/src/sys/kern/sys_generic.c:663
663             return (kern_select(td, uap->nd, uap->in, uap->ou, uap->ex, tvp));
(kgdb) up
#8  0xc070d645 in syscall (frame=0xe6f87d38) at /usr/src/sys/i386/i386/trap.c:1035
1035                    error = (*callp->sy_call)(td, args);
(kgdb) up
#9  0xc06f3c80 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:196
196             call    syscall
Current language:  auto; currently asm
(kgdb) list
191             pushl   %es
192             pushl   %fs
193             SET_KERNEL_SREGS
194             FAKE_MCOUNT(TF_EIP(%esp))
195             pushl   %esp
196             call    syscall
197             add     $4, %esp
198             MEXITCOUNT
199             jmp     doreti
200
(kgdb) up 7
#10 0x00000033 in ?? ()
(kgdb) list
226             .data
227             .p2align 4
228             .text
229             SUPERALIGN_TEXT
230     MCOUNT_LABEL(bintr)
231
232     #include <i386/isa/atpic_vector.s>
233
234     #ifdef DEV_APIC
235             .data
(kgdb)quit


Thank you