I ran the command:
find /proc | xargs grep a
BUG: unable to handle kernel NULL pointer dereference at virtual
address 00000000
printing eip:
f8ac1350
*pde = 00000000
Oops: 0000 [#1]
SMP
Modules linked in: arc4 ecb blkcipher cryptomgr crypto_algapi
ieee80211_crypt_wep bluetooth i915 drm acpi_cpufreq
cpufreq_conservative cpufreq_powersave cpufreq_performance ac battery
video output button processor container firewire_sbp2 parport_pc lp
parport pcmcia snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss
snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss yenta_socket
rsrc_nonstatic sdhci snd_seq_midi_event ipw2200 tifm_7xx1 mmc_core
pcmcia_core ieee80211 ieee80211_crypt tifm_core snd_seq snd_timer
snd_seq_device evdev shpchp snd iTCO_wdt iTCO_vendor_support
pci_hotplug soundcore snd_page_alloc firewire_ohci firewire_core
crc_itu_t 8139too ehci_hcd uhci_hcd usbcore fan
CPU: 0
EIP: 0060:[<f8ac1350>] Not tainted VLI
EFLAGS: 00010283 (2.6.22-rc6-mm1 #5)
EIP is at drm_vma_info+0x2a5/0x310 [drm]
eax: 00000000 ebx: c80cdf38 ecx: 00000000 edx: 00000000
esi: 00008000 edi: c467e000 ebp: c80cdf0c esp: c80cde9c
ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
Process grep (pid: 5172, ti=c80cd000 task=c7e9ed60 task.ti=c80cd000)
Stack: c467e000 f8ac595a 00000000 f8000000 38000000 00000000 c0526e9c c80cdefc
c0165700 00000044 00000001 00000000 c7e9ed60 00000000 c467e000 c63b68e0
c1195548 00000000 00000035 c7e9f328 00000001 000800d0 00000000 00000000
Call Trace:
[<c01b514d>] proc_file_read+0x108/0x222
[<c01b19ed>] proc_reg_read+0x63/0x76
[<c01834aa>] vfs_read+0xb0/0x139
[<c018390e>] sys_read+0x3d/0x72
[<c0108162>] sysenter_past_esp+0x6b/0xb5
[<ffffe410>] 0xffffe410
=======================
INFO: lockdep is turned off.
Code: 24 04 c9 59 ac f8 8b 45 c8 01 d8 89 04 24 e8 3c 66 74 c7 01 c3
89 5d d8 81 fb b0 0f 00 00 77 4a 8b 45 d4 8b 00 89 45 d4 8b 55 d4 <8b>
02 0f 18 00 90 8b 45 10 05 98 01 00 00 39 c2 0f 85 e7 fd ff
EIP: [<f8ac1350>] drm_vma_info+0x2a5/0x310 [drm] SS:ESP 0068:c80cde9c
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