BUG: unable to handle kernel NULL pointer dereference (aa_label_merge)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
AppArmor |
Confirmed
|
Medium
|
John Johansen | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
John Johansen | ||
Trusty |
Confirmed
|
Undecided
|
John Johansen | ||
Vivid |
Won't Fix
|
Undecided
|
Unassigned | ||
Wily |
Won't Fix
|
Undecided
|
John Johansen |
Bug Description
I had a kernel problem with one of my high availability VMs. This was not the first occurence of the problem, it seems to appear every now and then.
The VM froze because of the Kernel bug appended as a text file. I had to hard reset it.
I am running Ubuntu 14.04.2 Kernel 3.16.0-34-generic with libapache2-
Unfortunately I am unable to reproduce the bug at will. This is a serious problem for high availability VMs.
Looking at the trace, I assume this is a bug in AppArmor.
---
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 May 15 14:13 seq
crw-rw---- 1 root audio 116, 33 May 15 14:13 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.14.1-0ubuntu3.10
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=
InstallationDate: Installed on 2015-03-25 (61 days ago)
InstallationMedia: Ubuntu-Server 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
IwConfig:
eth0 no wireless extensions.
lo no wireless extensions.
Lsusb:
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
Package: linux (not installed)
PciMultimedia:
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 cirrusdrmfb
ProcKernelCmdLine: BOOT_IMAGE=
ProcVersionSign
RelatedPackageV
linux-
linux-
linux-firmware 1.127.11
RfKill: Error: [Errno 2] No such file or directory
Tags: trusty
Uname: Linux 3.16.0-37-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
WifiSyslog:
_MarkForUpload: True
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: rel-1.7.
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.
dmi.modalias: dmi:bvnSeaBIOS:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.
dmi.sys.vendor: QEMU
Changed in apparmor: | |
importance: | Undecided → Medium |
status: | New → Confirmed |
summary: |
- BUG: unable to handle kernel NULL pointer dereference + BUG: unable to handle kernel NULL pointer dereference (aa_label_merge) |
Changed in linux (Ubuntu): | |
assignee: | nobody → John Johansen (jjohansen) |
I saw the same thing this morning.
Ubuntu 14.04.2 LTS 3.16.0- 30-generic mod-apparmor 2.8.95~ 2430-0ubuntu5. 1
Kernel linux-image-
libapache2-
apache2-mpm-prefork 2.4.7-1ubuntu4.4
Attached is first the warning (like in bug 1447530), and then the Oops, 9 seconds later.