ath0: kernel panic when adhoc mode.

[Lystopad Olexandr]

 Hello, Paul B Mahol!

On Sun, Apr 18, 2010 at 10:20:26AM +0000
onemda at gmail.com wrote about "Re: ath0: kernel panic when adhoc mode.":
> On 4/14/10, Lystopad Olexandr <laa at laa.zp.ua> wrote:
> > Hi!
> >
> > I install 8.0 FreeBSD, upgrade it to yesturday stable.
> > I need to create wireless link in adhoc mode.
> > Help me to do this.
> >
> >
> > I put a wireless card into this box:
> >
> > ath0 at pci0:3:3:0:        class=0x020000 card=0xcc2114b9 chip=0x0013168c
> > rev=0x01 hdr=0x00
> >     vendor     = 'Atheros Communications Inc.'
> >     device     = '802.11a/b/g Wireless Adapter (AR5212)'
> >     class      = network
> >     subclass   = ethernet
> >     cap 01[44] = powerspec 2  supports D0 D3  current D0
> >
> >
> >
> > when I do:
> > # ifconfig wlan0 create wlandev ath0 wlanmode adhoc
> >
> > server reboot with kernel panic:
> >
> > Fatal trap 12: page fault while in kernel mode
> > cpuid = 1; apic id = 01
> > fault virtual address   = 0xffff
> > fault code              = supervisor read, page not present
> > instruction pointer     = 0x20:0xc0791612
> > stack pointer           = 0x28:0xd2f42ba4
> > frame pointer           = 0x28:0xd2f42bac
> > code segment            = base 0x0, limit 0xfffff, type 0x1b
> >                         = DPL 0, pres 1, def32 1, gran 1
> > processor eflags        = interrupt enabled, resume, IOPL = 0
> > current process         = 0 (ath0 taskq)
> > trap number             = 12
> > panic: page fault
> > cpuid = 1
> > Uptime: 3m35s
> > Physical memory: 439 MB
> > Dumping 80 MB: 65 49 33panic: bufwrite: buffer is not busy???
> > cpuid = 1
> >  17 1
> >
> > #0  doadump () at pcpu.h:246
> > 246     pcpu.h: No such file or directory.
> >         in pcpu.h
> > (kgdb) #0  doadump () at pcpu.h:246
> > #1  0xc06b3497 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:416
> > #2  0xc06b3789 in panic (fmt=Variable "fmt" is not available.
> > ) at /usr/src/sys/kern/kern_shutdown.c:579
> > #3  0xc08b63bc in trap_fatal (frame=0xd2f42b64, eva=65535)
> >     at /usr/src/sys/i386/i386/trap.c:938
> > #4  0xc08b6620 in trap_pfault (frame=0xd2f42b64, usermode=0, eva=65535)
> >     at /usr/src/sys/i386/i386/trap.c:851
> > #5  0xc08b6f39 in trap (frame=0xd2f42b64) at
> > /usr/src/sys/i386/i386/trap.c:533
> > #6  0xc0899b3b in calltrap () at /usr/src/sys/i386/i386/exception.s:165
> > #7  0xc0791612 in ieee80211_getcapinfo (vap=0xc2d5f000, chan=0xffff)
> >     at /usr/src/sys/net80211/ieee80211_output.c:1836
> > #8  0xc0793d17 in ieee80211_beacon_construct (m=0xc2edca00,
> >     frm=0xc2f0516e "", bo=0xc2d5f884, ni=0xc2ceb000)
> >     at /usr/src/sys/net80211/ieee80211_output.c:2559
> > #9  0xc07946db in ieee80211_beacon_alloc (ni=0xc2ceb000, bo=0xc2d5f884)
> >     at /usr/src/sys/net80211/ieee80211_output.c:2756
> > #10 0xc050eaea in ath_newstate (vap=0xc2d5f000, nstate=IEEE80211_S_RUN,
> >     arg=-1) at /usr/src/sys/dev/ath/if_ath.c:2641
> > #11 0xc0798db1 in ieee80211_newstate_cb (xvap=0xc2d5f000, npending=3)
> >     at /usr/src/sys/net80211/ieee80211_proto.c:1654
> > #12 0xc06ebf92 in taskqueue_run (queue=0xc2a84c80)
> >     at /usr/src/sys/kern/subr_taskqueue.c:239
> > #13 0xc06ec19d in taskqueue_thread_loop (arg=0xc2ada074)
> >     at /usr/src/sys/kern/subr_taskqueue.c:360
> > #14 0xc068a331 in fork_exit (callout=0xc06ec0e0 <taskqueue_thread_loop>,
> >     arg=0xc2ada074, frame=0xd2f42d38) at /usr/src/sys/kern/kern_fork.c:843
> > #15 0xc0899bb0 in fork_trampoline () at
> > /usr/src/sys/i386/i386/exception.s:270
> > (kgdb)
> >
> 
> This is bug, please report it ASAP.

Thanks.
Done. http://www.freebsd.org/cgi/query-pr.cgi?pr=145826

-- 
 Olexandr Lystopad