BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
c487203e
*pde = 00000000
Oops: 0000 [#1]
Modules linked in: arc4 ecb blkcipher cryptomgr rc80211_simple ath5k mac80211 cfg80211 e1000 8139too e100 3c59x
CPU:    0
EIP:    0060:[<c487203e>]    Not tainted VLI
EFLAGS: 00010246   (2.6.23-rc9-g2d46d1e0-dirty #1)
EIP is at ath5k_hw_reset+0x394/0xcee [ath5k]
eax: 00000000   ebx: c10a4f00   ecx: 00000000   edx: 00000005
esi: 00000000   edi: 00000000   ebp: c132be24   esp: c132bdc8
ds: 007b   es: 007b   fs: 0000  gs: 0000  ss: 0068
Process ip (pid: 866, ti=c132a000 task=c3e28030 task.ti=c132a000)
Stack: c132be08 c486c791 c3d79800 00000002 c10a50f4 c3d79800 f308bd02 00000000 
       00000001 c48ac686 00000003 00000001 00000002 00000014 c132be08 00000000 
       00000000 00000000 c1325000 00000001 c10a4f80 c10a4180 00001002 c132be48 
Call Trace:
 [<c01072ee>] show_trace_log_lvl+0x1a/0x2f
 [<c01073a0>] show_stack_log_lvl+0x9d/0xa5
 [<c0107567>] show_registers+0x1bf/0x291
 [<c0107732>] die+0xf9/0x1e6
 [<c030b2ef>] do_page_fault+0x538/0x61e
 [<c0309cfa>] error_code+0x6a/0x70
 [<c486d51f>] ath_start+0x72/0xfa [ath5k]
 [<c489c813>] ieee80211_open+0x1dc/0x3a1 [mac80211]
 [<c0280389>] dev_open+0x30/0x6a
 [<c027e67c>] dev_change_flags+0xa3/0x158
 [<c02c133c>] devinet_ioctl+0x20c/0x511
 [<c02c198e>] inet_ioctl+0x86/0xa4
 [<c02755cd>] sock_ioctl+0x1a9/0x1c6
 [<c01602a8>] do_ioctl+0x1c/0x50
 [<c01604ca>] vfs_ioctl+0x1ee/0x205
 [<c0160512>] sys_ioctl+0x31/0x4b
 [<c0105dd2>] syscall_call+0x7/0xb
 =======================
Code: 00 00 03 5a 08 89 fa c7 44 24 04 00 00 00 00 0f b6 46 1c 89 04 24 8b 45 b8 e8 3f cf ff ff 89 da 0f b7 c0 e8 15 7b 98 fb ff 45 e8 <0f> b7 07 83 c6 14 39 45 e8 72 b2 8b 4d b8 83 79 48 01 76 51 66 
EIP: [<c487203e>] ath5k_hw_reset+0x394/0xcee [ath5k] SS:ESP 0068:c132bdc8
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