Panic: ucom

Hi

I just got this panic:

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x2c
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc05b5d39
stack pointer           = 0x28:0xf7c3a918
frame pointer           = 0x28:0xf7c3a918
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         = 16822 (kermit)
trap number             = 12
panic: page fault
cpuid = 0
Uptime: 1d4h47m54s
Physical memory: 2024 MB


#0  doadump () at pcpu.h:221
#1  0xc0591d85 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:418
#2  0xc0592058 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:572
#3  0xc0750f51 in trap_fatal (frame=0xf7c3a8d8, eva=44)
    at /usr/src/sys/i386/i386/trap.c:943
#4  0xc07511a1 in trap_pfault (frame=0xf7c3a8d8, usermode=0, eva=44)
    at /usr/src/sys/i386/i386/trap.c:856
#5  0xc0751a96 in trap (frame=0xf7c3a8d8) at /usr/src/sys/i386/i386/trap.c:536
#6  0xc0737a2b in calltrap () at /usr/src/sys/i386/i386/exception.s:165
#7  0xc05b5d39 in device_get_nameunit (dev=0x0)
    at /usr/src/sys/kern/subr_bus.c:1946
#8  0xc053027a in uplcom_set_line_state (sc=0xc5aaa400)
    at /usr/src/sys/dev/usb/uplcom.c:662
#9  0xc05302e8 in uplcom_set (addr=0xc5aaa400, portno=-1, reg=1, onoff=0)
    at /usr/src/sys/dev/usb/uplcom.c:695
#10 0xc0520875 in ucomtty_modem (tp=0xca929600, sigon=0, sigoff=1)
    at /usr/src/sys/dev/usb/ucom.c:429
#11 0xc05212a1 in ucom_cleanup (sc=0xc5aaa400)
    at /usr/src/sys/dev/usb/ucom.c:224
#12 0xc0521419 in ucomtty_open (tp=0xca929600)
    at /usr/src/sys/dev/usb/ucom.c:253
#13 0xc05d8071 in ttydev_open (dev=0xc5ed2900, oflags=7, devtype=8192, 
    td=0xc5dec230) at ttydevsw.h:81
---Type <return> to continue, or q <return> to quit---
#14 0xc053bf2c in devfs_open (ap=0xf7c3aacc)
    at /usr/src/sys/fs/devfs/devfs_vnops.c:880
#15 0xc075ff82 in VOP_OPEN_APV (vop=0xc07e9cc0, a=0xf7c3aacc) at vnode_if.c:371
#16 0xc061af0b in vn_open_cred (ndp=0xf7c3aba8, flagp=0xf7c3ac5c, cmode=0, 
    cred=0xc5aa8c00, fp=0xc5ed1540) at vnode_if.h:196
#17 0xc061b049 in vn_open (ndp=0xf7c3aba8, flagp=0xf7c3ac5c, cmode=0, 
    fp=0xc5ed1540) at /usr/src/sys/kern/vfs_vnops.c:96
#18 0xc06197b8 in kern_openat (td=0xc5dec230, fd=-100, 
    path=0xbfbfcb33 <Address 0xbfbfcb33 out of bounds>, pathseg=UIO_USERSPACE, 
    flags=7, mode=0) at /usr/src/sys/kern/vfs_syscalls.c:1069
#19 0xc0619c6b in kern_open (td=0xc5dec230, 
    path=0xbfbfcb33 <Address 0xbfbfcb33 out of bounds>, pathseg=UIO_USERSPACE, 
    flags=6, mode=0) at /usr/src/sys/kern/vfs_syscalls.c:1023
#20 0xc0619cd0 in open (td=0xc5dec230, uap=0xf7c3acf8)
    at /usr/src/sys/kern/vfs_syscalls.c:999
#21 0xc07514ba in syscall (frame=0xf7c3ad38)
    at /usr/src/sys/i386/i386/trap.c:1090
#22 0xc0737a90 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:261
#23 0x00000033 in ?? ()


--
Ian Freislich