Re: uplcom(4) update from FreeBSD

[Johannes Hofmann <Johannes.Hofmann@xxxxxx>]

Johannes Hofmann <Johannes.Hofmann@xxxxxx> wrote:
> Hi Sascha, me objects :-) 
> I just got two crashes while accessing the updated driver... 
> Unfortunately no dumps though. I will try to fix this.

Ok, I finally got a core dump. The dump device was too small after
a memory upgrade...

Here is what I got:

(kgdb) bt
#0  dumpsys () at thread.h:83
#1  0xc028d3c3 in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:355
#2  0xc028da56 in panic (
    fmt=0xc06cb0e8 "uhci_abort_xfer: not in process context")
    at /usr/src/sys/kern/kern_shutdown.c:757
#3  0xc06b802b in uhci_abort_xfer (xfer=0xc330c920, status=USBD_CANCELLED)
    at /usr/src/sys/bus/usb/usb/../../../bus/usb/uhci.c:1934
#4  0xc06b7f80 in uhci_device_bulk_abort (xfer=0x0)
    at /usr/src/sys/bus/usb/usb/../../../bus/usb/uhci.c:1900
#5  0xc06b4d6e in usbd_ar_pipe (pipe=0xc328bfe0)
    at /usr/src/sys/bus/usb/usb/../../../bus/usb/usbdi.c:746
#6  0xc06b4a6d in usbd_abort_pipe (pipe=0x0)
    at /usr/src/sys/bus/usb/usb/../../../bus/usb/usbdi.c:548
#7  0xc06e477d in ucomstopread ()
#8  0xc06e41b5 in ucomstop ()
#9  0xc02b1f91 in ttyflush (tp=0xea7e2190, rw=3)
    at /usr/src/sys/kern/tty.c:1323
#10 0xc02b02ca in ttyinput (c=3, tp=0xea7e2190) at /usr/src/sys/kern/tty.c:459
#11 0xc06e4639 in ucomreadcb ()
#12 0xc06b4e90 in usb_transfer_complete (xfer=0xea7e2190)
    at /usr/src/sys/bus/usb/usb/../../../bus/usb/usbdi.c:830
#13 0xc06b76d2 in uhci_idone (ii=0x0)
    at /usr/src/sys/bus/usb/usb/../../../bus/usb/uhci.c:1480
---Type <return> to continue, or q <return> to quit---
#14 0xc06b75b4 in uhci_check_intr (sc=0xd6f345c0, ii=0xc330c990)
    at /usr/src/sys/bus/usb/usb/../../../bus/usb/uhci.c:1355
#15 0xc06b750e in uhci_softintr (v=0xd6f345c0)
    at /usr/src/sys/bus/usb/usb/../../../bus/usb/uhci.c:1282
#16 0xc06b23aa in usb_schedsoftintr (bus=0x0)
    at /usr/src/sys/bus/usb/usb/../../../bus/usb/usb.c:831
#17 0xc06b74cc in uhci_intr1 (sc=0xd6f345c0)
    at /usr/src/sys/bus/usb/usb/../../../bus/usb/uhci.c:1246
#18 0xc06b734e in uhci_intr (arg=0xd6f345c0)
    at /usr/src/sys/bus/usb/usb/../../../bus/usb/uhci.c:1161
#19 0xc02716dd in ithread_handler (arg=0xb)
    at /usr/src/sys/kern/kern_intr.c:766
#20 0xc0293f30 in lwkt_create (func=0, arg=0x0, tdp=0xc05abfe8, template=0x0, 
    tdflags=Cannot access memory at address 0x18
) at /usr/src/sys/kern/lwkt_thread.c:1290
Previous frame inner to this frame (corrupt stack?)
(kgdb) 

This after some ^C and cable pulling while using /dev/ucom0.

Regards,
Johannes