ifconfig ath0 mode 11g panics on netbsd-5 amd64

[Roy Marples]

Hi List

I've recently noticed that my ath(4) powered Access Point is running at
11Mb in 11b instead of the desired 54Mb in 11g, although I'm only using
WEP at this point. The mode isn't changed from the default autoselect.

Issuing the command
ifconfig ath0 mode 11g
causes a panic and reboot. Here's a bt

(gdb) bt
#0 0xffffffff8054c266 in cpu_reboot (howto=260, bootstr=<value
optimized out>)
at /usr/src/sys/arch/amd64/amd64/machdep.c:694
#1 0xffffffff80493328 in panic (
fmt=0xffffffff809b519f <Error reading address 0xffffffff809b519f:
Interrupted system call>) at /usr/src/sys/kern/
subr_prf.c:253
#2 0xffffffff8054da64 in trap (frame=0xffff800046ed2230)
at /usr/src/sys/arch/amd64/amd64/trap.c:256
#3 0xffffffff80100eea in calltrap ()
#4 0xffffffff804921ee in kprintf (fmt0=0x0, oflags=Cannot access memory
at address 0xffffffffffffff7c
)
at /usr/src/sys/kern/subr_prf.c:1458

Can anyone shed any light on a fix, or can I provide any more information?

Thanks

Roy

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[j+ (Jukka Salmi)]

Roy Marples --> tech-net (2009-06-14 20:23:04 +0100):
[...]

Post by Roy Marples
Issuing the command
ifconfig ath0 mode 11g
causes a panic and reboot.

[...]

Maybe this is PR kern/37350? I never tried to reproduce it with
netbsd-5 though, but I'll do so later today...


Regards, Jukka

[j+ (Jukka Salmi)]

Post by j+ (Jukka Salmi)
[...]

Post by Roy Marples
Issuing the command
ifconfig ath0 mode 11g
causes a panic and reboot.

[...]
Maybe this is PR kern/37350? I never tried to reproduce it with
netbsd-5 though, but I'll do so later today...

The system I had in mind still runs NetBSD 4, so I can't easily test it
with NetBSD 5. However, now I even can't reproduce it with NetBSD 4
anymore, so...


Regards, Jukka

[j+ (Jukka Salmi)]

Roy Marples --> tech-net (2009-06-14 20:23:04 +0100):
[...]

Post by Roy Marples
Issuing the command
ifconfig ath0 mode 11g
causes a panic and reboot.

[...]

Maybe this is PR kern/37350? I never tried to reproduce it with
netbsd-5 though, but I'll do so later today...


Regards, Jukka