linux-kernel - Oops... not sure why.

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Date:	Sun, 15 Jul 2007 12:26:27 -0400
From:	"Russell Harmon" <eatnumber1@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Oops... not sure why.

Hey all, just updated to 2.6.22.1, and have been getting the following
oops rather often in my dmesg. It eventually makes it so no programs
will start, and I lose internet connectivity and so have to reboot. I
have a centrino duo system running SMP.

I'm using SLAB.

Thanks
~Russ

BUG: unable to handle kernel NULL pointer dereference at virtual
address 00000000
 printing eip:
00000000
*pde = 00000000
Oops: 0000 [#2]
SMP
Modules linked in: snd_seq snd_seq_device snd_hda_intel snd_pcm
snd_timer snd snd_page_alloc rlocate tp_smapi thinkpad_ec iwl3945
e1000 firewire_ohci firewire_core
CPU:    0
EIP:    0060:[<00000000>]    Not tainted VLI
EFLAGS: 00010246   (2.6.22-kamikaze1-r1 #12)
EIP is at run_init_process+0x4fefff50/0x20
eax: e6299800   ebx: 00000000   ecx: b190d460   edx: b157cd40
esi: b157cd40   edi: f6af0ee4   ebp: 00000000   esp: e4cb1c5c
ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
Process gnome-pty-helpe (pid: 9708, ti=e4cb0000 task=f75b3a30 task.ti=e4cb0000)
Stack: b014b22e 000000d0 00000000 e6299800 e6299800 f6af0e40 e6299140 b014d370
       e6299800 b142d680 b01eeb24 e6299800 b142d680 e6299800 b142d680 00000000
       b17a4a00 00000000 b0151c70 000000d0 e4cb1d0c f607cebc f607ceb0 e6299140
Call Trace:
 [<b014b22e>] read_cache_page_async+0x8e/0x160
 [<b014d370>] read_cache_page+0x10/0x50
 [<b01eeb24>] unionfs_readpage+0x84/0x1d0
 [<b0151c70>] __do_page_cache_readahead+0x1f0/0x2a0
 [<b011c0ae>] dequeue_entity+0x7e/0xb0
 [<b0119f77>] dequeue_task+0x27/0x40
 [<b011b1cb>] update_stats_wait_end+0x9b/0xc0
 [<b0151df0>] ra_submit+0xd0/0xe0
 [<b0152798>] page_cache_readahead_adaptive+0x108/0x5e0
 [<b01eecd4>] unionfs_commit_write+0x64/0x1e0
 [<b014ba61>] do_generic_mapping_read+0x3a1/0x600
 [<b014db13>] generic_file_aio_read+0xd3/0x1d0
 [<b014abe0>] file_read_actor+0x0/0x120
 [<b01e52c1>] unionfs_aio_read+0x51/0xc0
 [<b016ad07>] do_sync_read+0xc7/0x110
 [<b01366a0>] autoremove_wake_function+0x0/0x50
 [<b0139452>] enqueue_hrtimer+0x72/0x100
 [<b0139b67>] hrtimer_start+0xc7/0x140
 [<b01e53f2>] unionfs_read+0x42/0xa0
 [<b016b5fc>] vfs_read+0xbc/0x160
 [<b01e53b0>] unionfs_read+0x0/0xa0
 [<b016bb31>] sys_read+0x41/0x70
 [<b0102a1a>] sysenter_past_esp+0x5f/0x85
 =======================
Code:  Bad EIP value.
EIP: [<00000000>] run_init_process+0x4fefff50/0x20 SS:ESP 0068:e4cb1c5c
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