** Tags added: patch
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https://bugs.launchpad.net/bugs/1317545
Title:
AppArmor: general protection fault: 0000 [#1] SMP
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
How to reproduce it:
1. Create a concatenated cache: (it might not be a correct thing to
do, but the kernel is not supposed to crash anyway)
. /lib/apparmor/functions
recache_profiles
rm -f "${PROFILES}"/cache/.ubercache
for i in "${PROFILES}"/cache/*; do
cat "$i" >> "${PROFILES}"/cache/.ubercache
done
2. sudo /etc/init.d/apparmor teardown
3. sudo /sbin/apparmor_parser --add -B /etc/apparmor.d/cache/.ubercache
=> $?=239 (EEXIST)
The issue with EEXIST is how apparmor_parser uploads the binary profiles to
the kernel in parser/parser_interface.c sd_load_buffer().
If /etc/apparmor.d/cache/.ubercache contains n profiles,
sd_load_buffer() was performing n write() to
/sys/kernel/security/apparmor/.load in this way:
1. write() with all profiles in the range [1, n]
2. write() with all profiles in the range [2, n]
3. write() with all profiles in the range [3, n]
...
n. write() with the n-th profile
The first write() is successful and the n-1 other write() return
EEXIST because the profiles is already uploaded in the first write().
Comment near parser/parser_interface.c sd_load_buffer():
/* bleah the kernel should just loop and do multiple load, but to support
* older systems we need to do this
4. sudo /sbin/apparmor_parser --replace -B /etc/apparmor.d/cache/.ubercache
=> segmentation fault (because of the kernel crash)
5. sudo /sbin/apparmor_parser --replace -B /etc/apparmor.d/cache/.ubercache
=> freeze in state "D"
ProblemType: KernelOops
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-24-generic 3.13.0-24.47
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
Annotation: Your system might become unstable now and might need to be
restarted.
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211
not found.
Date: Thu May 8 15:43:47 2014
Failure: oops
HibernationDevice: RESUME=UUID=ae00639c-b206-4387-b731-1a52e58547cf
InstallationDate: Installed on 2014-03-21 (48 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140321)
IwConfig:
eth0 no wireless extensions.
lo no wireless extensions.
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 80ee:0021 VirtualBox USB Tablet
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: innotek GmbH VirtualBox
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic
root=UUID=1ec94169-4f22-4000-90d6-c14f61a59998 ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions: kerneloops-daemon 0.12+git20090217-3ubuntu6
RfKill:
SourcePackage: linux
Title: general protection fault: 0000 [#1] SMP
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/01/2006
dmi.bios.vendor: innotek GmbH
dmi.bios.version: VirtualBox
dmi.board.name: VirtualBox
dmi.board.vendor: Oracle Corporation
dmi.board.version: 1.2
dmi.chassis.type: 1
dmi.chassis.vendor: Oracle Corporation
dmi.modalias:
dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
dmi.product.name: VirtualBox
dmi.product.version: 1.2
dmi.sys.vendor: innotek GmbH
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