BUG: unable to handle kernel paging request at 3f93cd3a
IP: [<c111a4cd>] kfree+0x3d/0xe0
*pde = 00000000 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:01.0/0000:01:05.0/drm/card0/card0-VGA-1/status
Modules linked in: cryptd aes_i586 aes_generic parport_pc ppdev snd_hda_codec_si3054 snd_hda_codec_realtek arc4 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi joydev binfmt_misc acer_wmi snd_seq_midi_event ath5k radeon sparse_keymap snd_seq ath mac80211 cfg80211 snd_timer snd_seq_device snd ttm soundcore psmouse i2c_piix4 drm_kms_helper video serio_raw snd_page_alloc drm i2c_algo_bit shpchp ati_agp lp parport 8139too 8139cp pata_atiixp sata_sil

Pid: 1138, comm: compiz Not tainted 2.6.38-7-generic #39-Ubuntu FUJITSU SIEMENS AMILO Li 1718/AMILO Li 1718
EIP: 0060:[<c111a4cd>] EFLAGS: 00010282 CPU: 0
EIP is at kfree+0x3d/0xe0
EAX: 44358000 EBX: 3f93cd3a ECX: efa31000 EDX: 00000000
ESI: f10df000 EDI: f0286000 EBP: f0995e00 ESP: f0995dec
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process compiz (pid: 1138, ti=f0994000 task=f1508000 task.ti=f0994000)
Stack:
 f02f8b40 f8335220 f0995e3c f10df000 00000198 f0995e1c f8335220 00000005
 f1de8014 f1f10000 00000000 f0995e84 f0995e90 f8335930 00000400 0000042d
 f0995e48 f0995edc f1f10c74 f0995e3c f4598060 f1f10000 f100a900 00000002
Call Trace:
 [<f8335220>] ? radeon_cs_parser_fini+0x50/0x130 [radeon]
 [<f8335220>] radeon_cs_parser_fini+0x50/0x130 [radeon]
 [<f8335930>] radeon_cs_ioctl+0x90/0x180 [radeon]
 [<f80f9cd1>] drm_ioctl+0x1e1/0x470 [drm]
 [<f83358a0>] ? radeon_cs_ioctl+0x0/0x180 [radeon]
 [<c103f8c9>] ? finish_task_switch+0x39/0xc0
 [<c1507365>] ? schedule+0x3a5/0x740
 [<c107d721>] ? tick_program_event+0x21/0x30
 [<f80f9af0>] ? drm_ioctl+0x0/0x470 [drm]
 [<c11365eb>] do_vfs_ioctl+0x7b/0x2e0
 [<c11368d7>] sys_ioctl+0x87/0x90
 [<c1054f02>] ? sys_gettimeofday+0x32/0x70
 [<c1509904>] syscall_call+0x7/0xb
 [<c1500000>] ? intel_workarounds+0x45/0x11c
Code: 04 89 45 f0 3e 8d 74 26 00 83 ff 10 76 5f 8d 9f 00 00 00 40 c1 eb 0c c1 e3 05 03 1d a4 ff 8f c1 8b 03 f6 c4 80 0f 85 91 00 00 00 <8b> 03 a8 80 74 7d 8b 4d 04 8b 73 0c 9c 58 8d 74 26 00 89 45 f0 
EIP: [<c111a4cd>] kfree+0x3d/0xe0 SS:ESP 0068:f0995dec
CR2: 000000003f93cd3a
---[ end trace 21c5c458c9afaeef ]---