kern/155714: zyd_bulk_write_callback panic in 8.2-RELEASE
Kevin Day
kevin at your.org
Sun Mar 20 08:30:02 UTC 2011
>Number: 155714
>Category: kern
>Synopsis: zyd_bulk_write_callback panic in 8.2-RELEASE
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Mar 20 08:30:01 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator: Kevin Day
>Release: FreeBSD 8.2-RELEASE amd64
>Organization:
Your.Org
>Environment:
System: FreeBSD cs43.your.org 8.2-RELEASE FreeBSD 8.2-RELEASE #0: Thu Feb 17 02:41:51 UTC 2011 root at mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
zyd0: <Belkin USB2.0 WLAN, rev 2.00/48.10, addr 2> on usbus1
>Description:
The zyd(4) driver worked for us in 8.1, but will cause a panic as soon as the wlan interface is brought up in 8.2.
>How-To-Repeat:
ifconfig wlan0 create wlandev zyd0
ifconfig zyd0 up
ifconfig wlan0 up
(panic here)
panic: page fault
cpuid = 4
KDB: stack backtrace:
#0 0xffffffff805f4e0e at kdb_backtrace+0x5e
#1 0xffffffff805c2d07 at panic+0x187
#2 0xffffffff808ac600 at trap_fatal+0x290
#3 0xffffffff808ac9df at trap_pfault+0x28f
#4 0xffffffff808acebf at trap+0x3df
#5 0xffffffff80894fb4 at calltrap+0x8
#6 0xffffffff80519190 at zyd_bulk_write_callback+0x230
#7 0xffffffff804fe740 at usbd_callback_wrapper+0x4c0
#8 0xffffffff804fabc6 at usb_command_wrapper+0x76
#9 0xffffffff804fd797 at usb_callback_proc+0x87
#10 0xffffffff804f7e23 at usb_process+0xd3
#11 0xffffffff805994f8 at fork_exit+0x118
#12 0xffffffff8089547e at fork_trampoline+0xe
(hard hang)
0xffffffff80519190 translates to:
/usr/src/sys/dev/usb/wlan/if_zyd.c:2383
It's hard locking at this point, so it's difficult for me to get much more
in the way of debugging.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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