BUG: unable to handle kernel NULL pointer dereference at 0000000000000068
IP: [<ffffffff8141c9a0>] apparmor_bprm_set_creds+0x340/0x430
PGD 4357b067 PUD 47d2d067 PMD 0 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/LNXSYSTM:00/device:00/PNP0C0A:00/power_supply/BAT0/voltage_now
CPU 0 
Modules linked in: binfmt_misc ppdev snd_hda_codec_conexant arc4 ecb joydev snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm ath5k snd_seq_dummy psmouse iptable_filter snd_seq_oss mac80211 amd64_edac_mod lp parport sdhci_pci sdhci serio_raw ip_tables snd_seq_midi led_class ath edac_core k8temp ricoh_mmc i2c_nforce2 x_tables snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd soundcore cfg80211 snd_page_alloc nvidia(P) video output forcedeth
Pid: 2255, comm: default.sfx Tainted: P           2.6.31-14-generic #48-Ubuntu         
RIP: 0010:[<ffffffff8141c9a0>]  [<ffffffff8141c9a0>] apparmor_bprm_set_creds+0x340/0x430
RSP: 0018:ffff880047c49dc8  EFLAGS: 00010246
RAX: 00000000fffffffe RBX: ffff88006e43cc00 RCX: ffff880047c49df8
RDX: ffff8800664e58e2 RSI: ffffffff81798480 RDI: 0000000000000004
RBP: ffff880047c49e78 R08: ffffffff816e6154 R09: 00000000000000e2
R10: 00000000000000f5 R11: 0000000000000000 R12: ffff880076c3c7a0
R13: 0000000000000000 R14: ffff880047c49dd8 R15: ffff880047c49e28
FS:  00007f7f9ff20800(0000) GS:ffff8800019f4000(0000) knlGS:00000000f74876c0
CS:  0010 DS: 002b ES: 002b CR0: 000000008005003b
CR2: 0000000000000068 CR3: 0000000043524000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process default.sfx (pid: 2255, threadinfo ffff880047c48000, task ffff88004359dac0)
Stack:
 0000000000000000 ffff88007b816000 0000000000000000 fffffffe000000d0
<0> ffffffff81723992 0000000000000000 ffff8800664e58e2 0000000000000000
<0> 0000000000000000 0000000000000000 0000000100000000 ffff880047c49e28
Call Trace:
 [<ffffffff8107cf19>] ? up_write+0x9/0x10
 [<ffffffff812201be>] security_bprm_set_creds+0xe/0x10
 [<ffffffff81125045>] prepare_binprm+0xb5/0x110
 [<ffffffff8116030c>] compat_do_execve+0x28c/0x400
 [<ffffffff81042ee5>] sys32_execve+0x45/0x70
 [<ffffffff81042cc5>] ia32_ptregs_common+0x25/0x50
Code: 0f 1f 00 4c 89 fe 65 48 8b 3c 25 c0 c6 00 00 e8 d7 f6 ff ff 85 c0 89 85 6c ff ff ff 0f 85 15 fe ff ff e9 de fe ff ff 0f 1f 40 00 <41> f6 45 68 08 0f 84 eb fd ff ff 0f 1f 44 00 00 e9 d7 fd ff ff 
RIP  [<ffffffff8141c9a0>] apparmor_bprm_set_creds+0x340/0x430
 RSP <ffff880047c49dc8>
CR2: 0000000000000068
---[ end trace be467baad1c43cdd ]---