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kern/48987: Kernel crashes on using ATmega32u4 Arduino on USB
>Number: 48987
>Category: kern
>Synopsis: Kernel crashes on using ATmega32u4 Arduino on USB
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sat Jul 12 11:25:00 +0000 2014
>Originator: Oleksandr Kozachuk
>Release: CURRENT
>Organization:
>Environment:
NetBSD iridium.kozachuk.info 6.99.46 NetBSD 6.99.46 (GENERIC) #1: Tue Jul 8
20:06:36 CEST 2014
root%bohrium.kozachuk.info@localhost:/usr/obj/amd64/sys/arch/amd64/compile/GENERIC
amd64
>Description:
If I plugin my ATmega32u4 Arduino on the USB (I have a Arduino Pro Micro), then
often, f.e. on reset of arduino board or on detaching, the kernel crashes
often, f.e. with following backtrace:
#0 0xffffffff805b14c5 in cpu_reboot (howto=howto@entry=260,
bootstr=bootstr@entry=0x0) at /usr/src/sys/arch/amd64/amd64/machdep.c:671
#1 0xffffffff807a83d4 in vpanic (fmt=0xffffffff80b9db18 "kernel %sassertion
\"%s\" failed: file \"%s\", line %d ", ap=ap@entry=0xfffffe810e622c28) at
/usr/src/sys/kern/subr_prf.c:284
#2 0xffffffff80932cc3 in kern_assert (fmt=fmt@entry=0xffffffff80b9db18 "kernel
%sassertion \"%s\" failed: file \"%s\", line %d ") at
/usr/src/sys/lib/libkern/kern_assert.c:51
#3 0xffffffff80936b2c in cv_exit (l=<optimized out>, error=0,
mtx=0xffff80000e5ee4a8, cv=0xfffffe810e580cd8) at
/usr/src/sys/kern/kern_condvar.c:177
#4 0xffffffff805185c1 in cv_exit (l=<optimized out>, error=0,
mtx=0xffff80000e5ee4a8, cv=0xfffffe810e580cd8) at
/usr/src/sys/kern/kern_condvar.c:220
#5 cv_wait (cv=cv@entry=0xfffffe810e580cd8, mtx=mtx@entry=0xffff80000e5ee4a8)
at /usr/src/sys/kern/kern_condvar.c:219
#6 0xffffffff80662712 in ohci_abort_xfer (xfer=0xfffffe810e580c30,
status=USBD_CANCELLED) at /usr/src/sys/dev/usb/ohci.c:2330
#7 0xffffffff80870f37 in usbd_ar_pipe (pipe=0xfffffe82156aff18) at
/usr/src/sys/dev/usb/usbdi.c:768
#8 usbd_abort_pipe (pipe=0xfffffe82156aff18) at
/usr/src/sys/dev/usb/usbdi.c:560
#9 0xffffffff8081a6c8 in ucom_detach (self=0xfffffe82170909c8,
flags=<optimized out>) at /usr/src/sys/dev/usb/ucom.c:274
#10 0xffffffff8079244d in config_detach (dev=0xfffffe82170909c8, flags=1) at
/usr/src/sys/kern/subr_autoconf.c:1689
#11 0xffffffff80865acf in umodem_common_detach (sc=0xfffffe821b60ac00,
flags=<optimized out>) at /usr/src/sys/dev/usb/umodem_common.c:677
#12 0xffffffff8079244d in config_detach (dev=dev@entry=0xfffffe8212491388,
flags=flags@entry=1) at /usr/src/sys/kern/subr_autoconf.c:1689
#13 0xffffffff808705ea in usb_disconnect_port (up=up@entry=0xfffffe810e5cff88,
parent=<optimized out>, flags=flags@entry=1) at
/usr/src/sys/dev/usb/usb_subr.c:1601
#14 0xffffffff808426e8 in uhub_explore (dev=0xfffffe810e54b890) at
/usr/src/sys/dev/usb/uhub.c:490
#15 0xffffffff8086cfc5 in usb_discover (sc=0xfffffe810e249048,
sc=0xfffffe810e249048) at /usr/src/sys/dev/usb/usb.c:829
#16 0xffffffff8086d086 in usb_event_thread (arg=0xfffffe810e249048) at
/usr/src/sys/dev/usb/usb.c:411
#17 0xffffffff80100807 in lwp_trampoline ()
#18 0x0000000000000000 in ?? ()
>How-To-Repeat:
Connect the ATmega32u4 to the machine and press reset.
>Fix:
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