oops on halt (guruplug)

[sleepymonad]

Installed the sheeva image on my guruplug. everything works fine (pacman -Syu went without problems), except that each time I halt the system, it crashes before the filesystems are synched.

I'm a bit at a loss about how to proceed from here. Any hints very much appreciated.

Short log: (full log (from boot till end of oops) at http://pastebin.com/rJzWA7hs):

[root@archy2 ~]# halt

INIT: Switching to runlevel: 0
[root@archy2 ~]#
INIT: Sending processes the TERM signal

INIT: [ 47.686005] kernel BUG at mm/slub.c:3302!
[ 47.690099] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[ 47.698883] pgd = c0004000
[ 47.701651] [00000000] *pgd=00000000
[ 47.707210] Internal error: Oops: 817 [#1] PREEMPT
[ 47.712029] Modules linked in: dm_mod uap8xxx libertas_sdio libertas btmrvl_sdio btmrvl cfg80211 bluetooth rfkill mv_cesa
[ 47.723131] CPU: 0 Not tainted (3.1.10-11-ARCH #1)
[ 47.728299] PC is at __bug+0x1c/0x28
[ 47.731894] LR is at __bug+0x18/0x28
[ 47.735488] pc : [<c000b498>] lr : [<c000b494>] psr: 40000013
[ 47.735493] sp : df849f38 ip : 00000000 fp : 00000000
[ 47.747031] r10: c0363014 r9 : 00000000 r8 : 00000000
[ 47.752281] r7 : df832000 r6 : c0362854 r5 : c05bd9e8 r4 : c05bda04
[ 47.758838] r3 : 00000000 r2 : df849f2c r1 : c04cad2c r0 : 00000033
[ 47.765397] Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 47.772738] Control: 0005397f Table: 1fae4000 DAC: 00000017
[ 47.778510] Process kworker/u:0 (pid: 5, stack limit = 0xdf848270)
[ 47.784719] Stack: (0xdf849f38 to 0xdf84a000)
[ 47.789098] 9f20: 00000400 c00bc288
[ 47.797317] 9f40: c068d090 c05bd9e8 df849f70 df832000 00000000 c0362854 c05bd9e8 c05ba9dc
[ 47.805540] 9f60: c0644c78 c036312c c068d0a0 c068d0a0 c068d0a8 c068d0a8 c0644c78 df81c280
[ 47.813764] 9f80: c05ba9c0 c00377f0 df832005 df81c280 c0644c78 df848000 c0644c6c df81c290
[ 47.821985] 9fa0: 00000089 c0644c78 00000000 c0037c44 df83bf3c df81c280 c0037a50 00000013
[ 47.830208] 9fc0: 00000000 00000000 00000000 c003c5cc 00000000 00000000 df81c280 00000000
[ 47.838432] 9fe0: df849fe0 df849fe0 df83bf3c c003c550 c000945c c000945c 02003479 1e2a7671
[ 47.846665] [<c000b498>] (__bug+0x1c/0x28) from [<c00bc288>] (kfree+0xb8/0x18c)
[ 47.854022] [<c00bc288>] (kfree+0xb8/0x18c) from [<c0362854>] (ops_exit_list+0x38/0x5c)
[ 47.862074] [<c0362854>] (ops_exit_list+0x38/0x5c) from [<c036312c>] (cleanup_net+0x118/0x1b4)
[ 47.870736] [<c036312c>] (cleanup_net+0x118/0x1b4) from [<c00377f0>] (process_one_work+0x264/0x498)
[ 47.879827] [<c00377f0>] (process_one_work+0x264/0x498) from [<c0037c44>] (worker_thread+0x1f4/0x34c)
[ 47.889096] [<c0037c44>] (worker_thread+0x1f4/0x34c) from [<c003c5cc>] (kthread+0x7c/0x88)
[ 47.897405] [<c003c5cc>] (kthread+0x7c/0x88) from [<c000945c>] (kernel_thread_exit+0x0/0x8)
[ 47.905801] Code: e59f0010 e1a01003 eb0f96fc e3a03000 (e5833000)
[ 47.912126] ---[ end trace ce3b6ffff9a5f68e ]---
[ 47.916867] Unable to handle kernel paging request at virtual address fffffffc
...

[sleepymonad]

Solved.

On #archlinux-arm it was suggested:
$this->bbcode_second_pass_quote('', '
')(14:02:50) xenoxaos: sleepyMonad, create a file /etc/modprobe.d/uap8xxx.conf and in that file, have just blacklist uap8xxx
(14:03:09) xenoxaos: and everything will be hunky dory