Re: kern/52526: Panic on "ifconfig athn0 down"

[Masanobu SAITOH <msaitoh%execsw.org@localhost>]

The following reply was made to PR kern/52526; it has been noted by GNATS.

From: Masanobu SAITOH <msaitoh%execsw.org@localhost>
To: gnats-bugs%NetBSD.org@localhost, kern-bug-people%netbsd.org@localhost,
 gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Cc: msaitoh%execsw.org@localhost
Subject: Re: kern/52526: Panic on "ifconfig athn0 down"
Date: Mon, 3 Jun 2019 19:05:04 +0900

 On 2017/09/05 2:50, Andreas Gustafsson wrote:
 >> Number:         52526
 >> Category:       kern
 >> Synopsis:       Panic on "ifconfig athn0 down"
 >> Confidential:   no
 >> Severity:       serious
 >> Priority:       high
 >> Responsible:    kern-bug-people
 >> State:          open
 >> Class:          sw-bug
 >> Submitter-Id:   net
 >> Arrival-Date:   Mon Sep 04 17:50:00 +0000 2017
 >> Originator:     Andreas Gustafsson
 >> Release:        NetBSD-current, source date 2017.07.21.02.51.12
 >> Organization:
 > 
 >> Environment:
 > System: NetBSD
 > Architecture: i386
 > Machine: i386
 >> Description:
 > 
 > I'm trying to get a USB WiFi adapter to work on a NetBSD-current/i386 system,
 > without much success.  At one point during the process I entered the command
 > "ifconfig athn0 down", and the machine paniced as follows:
 > 
 >   (gdb) where
 >   #0  0xc011dd95 in maybe_dump (howto=260) at /bracket/prod/current/src/sys/arch/i386/i386/machdep.c:708
 >   #1  cpu_reboot (howto=howto@entry=260, bootstr=bootstr@entry=0x0) at /bracket/prod/current/src/sys/arch/i386/i386/machdep.c:729
 >   #2  0xc092c540 in vpanic (fmt=fmt@entry=0xc0f526ce "trap", ap=ap@entry=0xd9570b08 "\220\vW\331\220\vW\331\001") at /bracket/prod/current/src/sys/kern/subr_prf.c:342
 >   #3  0xc092c5ca in panic (fmt=fmt@entry=0xc0f526ce "trap") at /bracket/prod/current/src/sys/kern/subr_prf.c:258
 >   #4  0xc012063f in trap (frame=0xd9570b90) at /bracket/prod/current/src/sys/arch/i386/i386/trap.c:325
 >   #5  0xc0116f5f in alltraps ()
 >   #6  0xd9570b90 in ?? ()
 >   #7  0xc0392a46 in usb_transfer_complete (xfer=xfer@entry=0xc2867624) at /bracket/prod/current/src/sys/dev/usb/usbdi.c:941
 >   #8  0xc057e516 in uhci_abort_xfer (xfer=<optimized out>, status=<optimized out>) at /bracket/prod/current/src/sys/dev/usb/uhci.c:2423
 >   #9  0xc0391978 in usbd_ar_pipe (pipe=pipe@entry=0xc27a4e48) at /bracket/prod/current/src/sys/dev/usb/usbdi.c:880
 >   #10 0xc039275c in usbd_abort_pipe (pipe=0xc27a4e48) at /bracket/prod/current/src/sys/dev/usb/usbdi.c:668
 >   #11 0xc040d991 in athn_usb_stop_locked (ifp=ifp@entry=0xc2119ae4) at /bracket/prod/current/src/sys/dev/usb/if_athn_usb.c:2937
 >   #12 0xc040db9b in athn_usb_stop (ifp=0xc2119ae4, disable=0) at /bracket/prod/current/src/sys/dev/usb/if_athn_usb.c:2907
 >   #13 0xc040e6f7 in athn_usb_ioctl (ifp=0xc2119ae4, cmd=2156947728, data=0xc29af3c8) at /bracket/prod/current/src/sys/dev/usb/if_athn_usb.c:2676
 >   #14 0xc09c217e in doifioctl (so=0xc29a26a4, cmd=2156947728, data=0xc29af3c8, l=0xc27cc2a0) at /bracket/prod/current/src/sys/net/if.c:3042
 >   #15 0xc094381c in soo_ioctl (fp=0xc2988bc0, cmd=2156947728, data=0xc29af3c8) at /bracket/prod/current/src/sys/kern/sys_socket.c:202
 >   #16 0xc0937714 in sys_ioctl (l=0xc27cc2a0, uap=0xd9570f68, retval=0xd9570f60) at /bracket/prod/current/src/sys/kern/sys_generic.c:671
 >   #17 0xc015a37d in sy_call (rval=0xd9570f60, uap=0xd9570f68, l=0xc27cc2a0, sy=0xc12390d8 <sysent+1080>) at /bracket/prod/current/src/sys/sys/syscallvar.h:65
 >   #18 sy_invoke (code=54, rval=0xd9570f60, uap=0xd9570f68, l=0xc27cc2a0, sy=0xc12390d8 <sysent+1080>) at /bracket/prod/current/src/sys/sys/syscallvar.h:94
 >   #19 syscall (frame=0xd9570fa8) at /bracket/prod/current/src/sys/arch/x86/x86/syscall.c:144
 >   #20 0xc0100696 in Xsyscall ()
 >   #21 0xd9570fa8 in ?? ()
 > 
 > This is the same Comfast CF-WU871N adapter as in PR 51531.
 > 
 >> How-To-Repeat:
 > 
 >> Fix:
 > 
 
 Do you still have this problem?
 Some changes have been added to athn(4) since September 2017, so this problem might be fixed now.
 
 -- 
 -----------------------------------------------
                 SAITOH Masanobu (msaitoh%execsw.org@localhost
                                  msaitoh%netbsd.org@localhost)