kern/122926: [panic] Burning with k3b cause kernel panic if kscd runs simua

[Stas Timokhin]

kgdb /boot/kernel/kernel.symbols /var/crash/vmcore.1
[GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: 
Undefined symbol "ps_pglobal_lookup"]
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Unread portion of the kernel message buffer:


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x188
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc05820e4
stack pointer           = 0x28:0xd74f4a2c
frame pointer           = 0x28:0xd74f4a44
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         = 3998 (growisofs)
trap number             = 12
panic: page fault
cpuid = 0
Uptime: 1h7m23s
Physical memory: 499 MB
Dumping 113 MB: 98 82 66 50 34 18 2

#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  0xc058f6f7 in boot (howto=260) at ../../../kern/kern_shutdown.c:409
#2  0xc058f9b9 in panic (fmt=Variable "fmt" is not available.
) at ../../../kern/kern_shutdown.c:563
#3  0xc0761bac in trap_fatal (frame=0xd74f49ec, eva=392) 
at ../../../i386/i386/trap.c:899
#4  0xc0761e10 in trap_pfault (frame=0xd74f49ec, usermode=0, eva=392) 
at ../../../i386/i386/trap.c:812
#5  0xc0762792 in trap (frame=0xd74f49ec) at ../../../i386/i386/trap.c:490
#6  0xc074910b in calltrap () at ../../../i386/i386/exception.s:139
#7  0xc05820e4 in _mtx_lock_sleep (m=0xc3b0328c, tid=3283403296, opts=0, 
file=0x0, line=0) at ../../../kern/kern_mutex.c:335
#8  0xc058ea38 in _sema_timedwait (sema=0xc3b0328c, timo=20000, file=0x0, 
line=0) at ../../../kern/kern_sema.c:113
#9  0xc048219a in ata_queue_request (request=0xc3b03240) 
at ../../../dev/ata/ata-queue.c:105
#10 0xc048fb69 in atapi_action (sim=0xc30bc200, ccb=0xc30bf400) 
at ../../../dev/ata/atapi-cam.c:641
#11 0xc043f2c4 in xpt_run_dev_sendq (bus=0xc30b8800) 
at ../../../cam/cam_xpt.c:3914
#12 0xc043f6e1 in xpt_action (start_ccb=0xc30bf400) 
at ../../../cam/cam_xpt.c:3067
#13 0xc043ada8 in cam_periph_runccb (ccb=0xc30bf400, error_routine=0, 
camflags=CAM_RETRY_SELTO, sense_flags=1, ds=0xc30a8a50)
    at ../../../cam/cam_periph.c:878
#14 0xc0452c4e in passioctl (dev=0xc30c3400, cmd=3261076738, 
addr=0xc2fb3400 "", flag=3, td=0xc3b4c220)
    at ../../../cam/scsi/scsi_pass.c:570
#15 0xc0525b3b in devfs_ioctl_f (fp=0xc4102a20, com=3261076738, 
data=0xc2fb3400, cred=0xc35fb700, td=0xc3b4c220)
    at ../../../fs/devfs/devfs_vnops.c:494
#16 0xc05c3cc5 in kern_ioctl (td=0xc3b4c220, fd=5, com=3261076738, 
data=0xc2fb3400 "") at file.h:266
#17 0xc05c3e24 in ioctl (td=0xc3b4c220, uap=0xd74f4cfc) 
at ../../../kern/sys_generic.c:570
#18 0xc0762165 in syscall (frame=0xd74f4d38) at ../../../i386/i386/trap.c:1035
#19 0xc0749170 in Xint0x80_syscall () at ../../../i386/i386/exception.s:196
#20 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)

(kgdb) p panicstr
$1 = 0xc0823200 "page fault"
(kgdb) 




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