BUG: unable to handle kernel paging request at ffffb4ff
IP: [<c11e4690>] ext4_get_acl+0x80/0x210
*pde = 01874067 *pte = 00000000 
Oops: 0000 [#1] SMP 
Modules linked in: bnep rfcomm bluetooth dm_crypt olpc_xo1 scx200_acb snd_cs5535audio snd_ac97_codec ac97_bus snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd cs5535_gpio soundcore snd_page_alloc binfmt_misc geode_aes cs5535_mfd geode_rng msr vesafb usbhid hid 8139too pata_cs5536 8139cp

Pid: 1798, comm: gnome-session-c Not tainted 3.0.0-11-generic #17-Ubuntu First International Computer, Inc.  ION603/ION603
EIP: 0060:[<c11e4690>] EFLAGS: 00010286 CPU: 0
EIP is at ext4_get_acl+0x80/0x210
EAX: f5d3009c EBX: f5d30088 ECX: 00000000 EDX: f5d301d8
ESI: ffffb4ff EDI: 00008000 EBP: f29b3dc8 ESP: f29b3da4
 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
Process gnome-session-c (pid: 1798, ti=f29b2000 task=f2bd72c0 task.ti=f29b2000)
Stack:
 f29b3db0 c113bb90 f5d301d8 f29b3de4 c11b9016 f5d3009c f5d30088 f5d30088
 00000001 f29b3ddc c11e4cca 00000001 f5d30088 000081ed f29b3df0 c11313b7
 00000021 00000021 f5d30088 f29b3e08 c1131b45 c11e4c80 f5d30088 00000021
Call Trace:
 [<c113bb90>] ? d_splice_alias+0x40/0x50
 [<c11b9016>] ? ext4_lookup.part.30+0x56/0x120
 [<c11e4cca>] ext4_check_acl+0x4a/0x90
 [<c11313b7>] acl_permission_check+0x97/0xa0
 [<c1131b45>] generic_permission+0x25/0xc0
 [<c11e4c80>] ? ext4_xattr_set_acl+0x160/0x160
 [<c1131c79>] inode_permission+0x99/0xd0
 [<c11e4c80>] ? ext4_xattr_set_acl+0x160/0x160
 [<c1131d1b>] may_open+0x6b/0x110
 [<c1134566>] do_last+0x1a6/0x640
 [<c113595d>] path_openat+0x9d/0x350
 [<c10de692>] ? unlock_page+0x42/0x50
 [<c10fb960>] ? __do_fault+0x3b0/0x4b0
 [<c1135c41>] do_filp_open+0x31/0x80
 [<c124c743>] ? aa_dup_task_context+0x33/0x60
 [<c1250eed>] ? apparmor_cred_prepare+0x2d/0x50
 [<c112e9ef>] open_exec+0x2f/0x110
 [<c112eef7>] ? check_unsafe_exec+0xb7/0xf0
 [<c112efba>] do_execve_common+0x8a/0x270
 [<c112f1b7>] do_execve+0x17/0x20
 [<c100a0a7>] sys_execve+0x37/0x70
 [<c15336ae>] ptregs_execve+0x12/0x18
 [<c152c8d4>] ? syscall_call+0x7/0xb
Code: 8d 76 00 8d 93 54 01 00 00 8b 32 85 f6 74 e2 8d 43 14 89 55 e4 89 45 f0 e8 2e 7e 34 00 8b 55 e4 8b 32 83 fe ff 74 07 85 f6 74 03 <3e> ff 06 8b 45 f0 e8 25 19 e4 ff 90 83 fe ff 75 b5 81 ff 00 40 
EIP: [<c11e4690>] ext4_get_acl+0x80/0x210 SS:ESP 0068:f29b3da4
CR2: 00000000ffffb4ff
---[ end trace b567e6a3070ffb42 ]---