Comment 2 for bug 1511213

Not sure why the kernel apport hook doesn't pick up anything from /var/log/kern.log, but here's the oopses:

kernel: [ 23.256838] ------------[ cut here ]------------
kernel: [ 23.256846] WARNING: CPU: 1 PID: 2731 at /build/linux-AxjFAn/linux-4.2.0/include/linux/kref.h:47 aa_label_merge+0x86f/0x8c0()
kernel: [ 23.256847] Modules linked in: overlay pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) binfmt_misc rfcomm bnep nls_iso8859_1 btusb btrtl btbcm btintel bluetooth intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul arc4 ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd joydev snd_hda_codec_hdmi snd_hda_codec_realtek input_leds snd_hda_codec_generic serio_raw snd_seq_midi snd_seq_midi_event snd_rawmidi snd_hda_intel iwlmvm snd_hda_codec snd_hda_core mac80211 snd_hwdep snd_seq snd_pcm snd_seq_device iwlwifi thinkpad_acpi cfg80211 nvram mei_me mei rtsx_pci_ms lpc_ich memstick snd_timer shpchp snd soundcore mac_hid parport_pc ppdev sunrpc lp parport autofs4 btrfs xor raid6_pq rtsx_pci_sdmmc i915 psmouse ahci e1000e libahci i2c_algo_bit drm_kms_helper ptp rtsx_pci pps_core drm wmi video
kernel: [ 23.256905] CPU: 1 PID: 2731 Comm: pickup Tainted: G W OE 4.2.0-16-generic #19-Ubuntu
kernel: [ 23.256907] Hardware name: LENOVO 20BXCTO1WW/20BXCTO1WW, BIOS JBET46WW (1.11 ) 03/02/2015
kernel: [ 23.256908] 0000000000000000 00000000064deb72 ffff88034da43a90 ffffffff817e8c09
kernel: [ 23.256912] 0000000000000000 0000000000000000 ffff88034da43ad0 ffffffff8107b3c6
kernel: [ 23.256914] ffff88034da43ae0 ffff88034a79d830 ffff880348de0830 ffff88034c7dad00
kernel: [ 23.256917] Call Trace:
kernel: [ 23.256922] [<ffffffff817e8c09>] dump_stack+0x45/0x57
kernel: [ 23.256926] [<ffffffff8107b3c6>] warn_slowpath_common+0x86/0xc0
kernel: [ 23.256929] [<ffffffff8107b4fa>] warn_slowpath_null+0x1a/0x20
kernel: [ 23.256931] [<ffffffff8136e06f>] aa_label_merge+0x86f/0x8c0
kernel: [ 23.256935] [<ffffffff8136a8a2>] update_file_cxt+0x32/0x80
kernel: [ 23.256937] [<ffffffff8136b706>] aa_file_perm+0x366/0x410
kernel: [ 23.256940] [<ffffffff8136b7b0>] ? aa_file_perm+0x410/0x410
kernel: [ 23.256942] [<ffffffff8136b811>] match_file+0x61/0x70
kernel: [ 23.256945] [<ffffffff8121a368>] iterate_fd+0x58/0x90
kernel: [ 23.256947] [<ffffffff8136b8f3>] aa_inherit_files+0xd3/0x1e0
kernel: [ 23.256950] [<ffffffff8136796b>] apparmor_bprm_committing_creds+0x6b/0x90
kernel: [ 23.256954] [<ffffffff813261d5>] security_bprm_committing_creds+0x25/0x40
kernel: [ 23.256957] [<ffffffff812030d6>] install_exec_creds+0x16/0x80
kernel: [ 23.256961] [<ffffffff812555ce>] load_elf_binary+0xb4e/0x1140
kernel: [ 23.256964] [<ffffffff812034d6>] search_binary_handler+0x96/0x1c0
kernel: [ 23.256968] [<ffffffff81204c55>] do_execveat_common.isra.33+0x545/0x710
kernel: [ 23.256971] [<ffffffff81022a9b>] ? do_audit_syscall_entry+0x4b/0x70
kernel: [ 23.256974] [<ffffffff812050ca>] SyS_execve+0x3a/0x50
kernel: [ 23.256977] [<ffffffff817efd25>] stub_execve+0x5/0x5
kernel: [ 23.256980] [<ffffffff817ef9f2>] ? entry_SYSCALL_64_fastpath+0x16/0x75
kernel: [ 23.256982] ---[ end trace 0efc345b852f378f ]---
kernel: [ 23.256992] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
kernel: [ 23.257039] IP: [<ffffffff8136dd9d>] aa_label_merge+0x59d/0x8c0
kernel: [ 23.257074] PGD 0
kernel: [ 23.257086] Oops: 0000 [#1] SMP
kernel: [ 23.257105] Modules linked in: overlay pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) binfmt_misc rfcomm bnep nls_iso8859_1 btusb btrtl btbcm btintel bluetooth intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul arc4 ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd joydev snd_hda_codec_hdmi snd_hda_codec_realtek input_leds snd_hda_codec_generic serio_raw snd_seq_midi snd_seq_midi_event snd_rawmidi snd_hda_intel iwlmvm snd_hda_codec snd_hda_core mac80211 snd_hwdep snd_seq snd_pcm snd_seq_device iwlwifi thinkpad_acpi cfg80211 nvram mei_me mei rtsx_pci_ms lpc_ich memstick snd_timer shpchp snd soundcore mac_hid parport_pc ppdev sunrpc lp parport autofs4 btrfs xor raid6_pq rtsx_pci_sdmmc i915 psmouse ahci e1000e libahci i2c_algo_bit drm_kms_helper ptp rtsx_pci pps_core drm wmi video
kernel: [ 23.257616] CPU: 0 PID: 2732 Comm: qmgr Tainted: G W OE 4.2.0-16-generic #19-Ubuntu
kernel: [ 23.257660] Hardware name: LENOVO 20BXCTO1WW/20BXCTO1WW, BIOS JBET46WW (1.11 ) 03/02/2015
kernel: [ 23.257701] task: ffff88034da15280 ti: ffff88034c460000 task.ti: ffff88034c460000
kernel: [ 23.257740] RIP: 0010:[<ffffffff8136dd9d>] [<ffffffff8136dd9d>] aa_label_merge+0x59d/0x8c0
kernel: [ 23.257781] RSP: 0018:ffff88034c463af0 EFLAGS: 00010202
kernel: [ 23.257797] RAX: 0000000000000000 RBX: ffff88034c7da100 RCX: 0000000000000000
kernel: [ 23.257817] RDX: 0000000000000020 RSI: 0000000000000000 RDI: ffff88035102f000
kernel: [ 23.257837] RBP: ffff88034c463b60 R08: ffff880351023ff6 R09: 0000000000000000
kernel: [ 23.257858] R10: 0000000000000006 R11: 0000000000000000 R12: ffff880348de6030
kernel: [ 23.257878] R13: 0000000000000020 R14: ffff88035102f0a0 R15: ffff88035102f0a0
kernel: [ 23.257899] FS: 0000000000000000(0000) GS:ffff88035dc00000(0000) knlGS:0000000000000000
kernel: [ 23.257922] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kernel: [ 23.257939] CR2: 0000000000000008 CR3: 000000034d8e0000 CR4: 00000000003406f0
kernel: [ 23.257960] Stack:
kernel: [ 23.257966] 0000000000000000 00000000c81d2599 ffff88034c463bf4 ffff880348de6000
kernel: [ 23.257990] ffff88035102f0a0 ffffffff8136ae94 ffff880300000000 00000000c81d2599
kernel: [ 23.258013] ffff880300000000 ffff88034d858c60 ffff88034c7da100 ffff880348de6030
kernel: [ 23.258037] Call Trace:
kernel: [ 23.258046] [<ffffffff8136ae94>] ? __aa_path_perm+0xf4/0x110
kernel: [ 23.258065] [<ffffffff8136a8a2>] update_file_cxt+0x32/0x80
kernel: [ 23.258081] [<ffffffff8136b706>] aa_file_perm+0x366/0x410
kernel: [ 23.258098] [<ffffffff8136b7b0>] ? aa_file_perm+0x410/0x410
kernel: [ 23.258115] [<ffffffff8136b811>] match_file+0x61/0x70
kernel: [ 23.258132] [<ffffffff8121a368>] iterate_fd+0x58/0x90
kernel: [ 23.258148] [<ffffffff8136b8f3>] aa_inherit_files+0xd3/0x1e0
kernel: [ 23.258166] [<ffffffff8136796b>] apparmor_bprm_committing_creds+0x6b/0x90
kernel: [ 23.258187] [<ffffffff813261d5>] security_bprm_committing_creds+0x25/0x40
kernel: [ 23.258209] [<ffffffff812030d6>] install_exec_creds+0x16/0x80
kernel: [ 23.258228] [<ffffffff812555ce>] load_elf_binary+0xb4e/0x1140
kernel: [ 23.258246] [<ffffffff812034d6>] search_binary_handler+0x96/0x1c0
kernel: [ 23.258266] [<ffffffff81204c55>] do_execveat_common.isra.33+0x545/0x710
kernel: [ 23.258286] [<ffffffff81022a9b>] ? do_audit_syscall_entry+0x4b/0x70
kernel: [ 23.258306] [<ffffffff812050ca>] SyS_execve+0x3a/0x50
kernel: [ 23.258324] [<ffffffff817efd25>] stub_execve+0x5/0x5
kernel: [ 23.258340] [<ffffffff817ef9f2>] ? entry_SYSCALL_64_fastpath+0x16/0x75
kernel: [ 23.258359] Code: 14 24 39 c8 89 c2 75 07 e9 6b fb ff ff 89 c2 85 d2 74 d3 8d 4a 01 89 d0 f0 41 0f b1 0c 24 39 d0 75 eb e9 51 fb ff ff 48 8b 73 30 <48> 8b 5e 08 48 85 db 74 15 8b 0b 85 c9 74 f1 8d 51 01 89 c8 f0
kernel: [ 23.258450] RIP [<ffffffff8136dd9d>] aa_label_merge+0x59d/0x8c0
kernel: [ 23.258469] RSP <ffff88034c463af0>
kernel: [ 23.258479] CR2: 0000000000000008
kernel: [ 23.269099] ---[ end trace 0efc345b852f3790 ]---