Commit Graph

248 Commits

Author SHA1 Message Date
intrigeri
3343ab0cd9 AppArmor: add mount rules needed with additional mediation features brought by Linux 4.14
This set of rules was proposed by Christian Boltz <apparmor@cboltz.de>
on https://bugzilla.opensuse.org/show_bug.cgi?id=1065123.
2017-11-19 19:16:27 +01:00
intrigeri
3b1d19e6c9 AppArmor: add rules needed with additional mediation features brought by Linux 4.14. 2017-11-19 19:16:27 +01:00
Christian Ehrhardt
b4470515f6 apparmor, virt-aa-helper: allow ipv6
In case ipv6 is used the network inet6 permission is required for
virt-aa-helper.

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
2017-11-07 16:57:32 +01:00
Christian Ehrhardt
37a4e6d430 apparmor: allow qemu to read max_segments
Since qemu 2.9 via 9103f1ce "file-posix: Consider max_segments for
BlockLimits.max_transfer" this is a new access that is denied by the
qemu profile.

It is non fatal, but prevents the fix mentioned to actually work.
It should be safe to allow reading from that path.

Since qemu opens a symlink path we need to translate that for apparmor from
"/sys/dev/block/*/queue/max_segments" to
"/sys/devices/**/block/*/queue/max_segments"

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
2017-11-07 16:57:32 +01:00
Andrea Bolognani
3e7db8d3e8 Remove backslash alignment attempts
Right-aligning backslashes when defining macros or using complex
commands in Makefiles looks cute, but as soon as any changes is
required to the code you end up with either distractingly broken
alignment or unnecessarily big diffs where most of the changes
are just pushing all backslashes a few characters to one side.

Generated using

  $ git grep -El '[[:blank:]][[:blank:]]\\$' | \
    grep -E '*\.([chx]|am|mk)$$' | \
    while read f; do \
      sed -Ei 's/[[:blank:]]*[[:blank:]]\\$/ \\/g' "$f"; \
    done

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
2017-11-03 13:24:12 +01:00
Christian Ehrhardt
d4d50bcc79 virt-aa-helper: fix libusb access to udev usb descriptions
In bf3a4140 "virt-aa-helper: fix libusb access to udev usb data" the
libusb access to properly detect the device/bus ids was fixed.

The path /run/udev/data/+usb* contains a subset of that information we
already allow to be read and are currently not needed for the function
qemu needs libusb for. But on the init of libusb all those files are
still read so a lot of apparmor denials can be seen when using usb host
devices, like:
  apparmor="DENIED" operation="open" name="/run/udev/data/+usb:2-1.2:1.0"
  comm="qemu-system-x86" requested_mask="r" denied_mask="r"

Today we could silence the warnings with a deny rule without breaking
current use cases. But since the data in there is only a subset of those
it can read already it is no additional information exposure. And on the
other hand a future udev/libusb/qemu combination might need it so allow
the access in the default apparmor profile.

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
2017-10-26 12:48:32 +02:00
Jim Fehlig
c44b29aacb apparmor: add dnsmasq ptrace rule to libvirtd profile
Commit b482925c added ptrace rule for the apparmor profiles,
but one was missed in the libvirtd profile for dnsmasq. It was
overlooked since the test machine did not have an active libvirt
network requiring dnsmasq that was also set to autostart. With
one active and set to autostart, the following denial is observed
in audit.log when restarting libvirtd

type=AVC msg=audit(1507320136.306:298): apparmor="DENIED" \
operation="ptrace" profile="/usr/sbin/libvirtd" pid=5472 \
comm="libvirtd" requested_mask="trace" denied_mask="trace" \
peer="/usr/sbin/dnsmasq"

With an active network, I suspect a libvirtd restart causes access
to /proc/<dnsmasq-pid>/*, hence the resulting denial. As a nasty
side affect of the denial, libvirtd thinks it needs to spawn a
dnsmasq process even though one is already running for the network.
E.g. after two libvirtd restarts

dnsmasq   1683  0.0  0.0  51188  2612 ?        S    12:03   0:00 \
 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf \
 --leasefile-ro --dhcp-script=/usr/lib64/libvirt/libvirt_leaseshelper
root      1684  0.0  0.0  51160   576 ?        S    12:03   0:00 \
 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf \
 --leasefile-ro --dhcp-script=/usr/lib64/libvirt/libvirt_leaseshelper
dnsmasq   4706  0.0  0.0  51188  2572 ?        S    13:54   0:00 \
 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf \
 --leasefile-ro --dhcp-script=/usr/lib64/libvirt/libvirt_leaseshelper
root      4707  0.0  0.0  51160   572 ?        S    13:54   0:00 \
 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf \
 --leasefile-ro --dhcp-script=/usr/lib64/libvirt/libvirt_leaseshelper
dnsmasq   4791  0.0  0.0  51188  2580 ?        S    13:56   0:00 \
 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf \
 --leasefile-ro --dhcp-script=/usr/lib64/libvirt/libvirt_leaseshelper
root      4792  0.0  0.0  51160   572 ?        S    13:56   0:00 \
 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf \
 --leasefile-ro --dhcp-script=/usr/lib64/libvirt/libvirt_leaseshelper

A simple fix is to add a ptrace rule for dnsmasq.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-By: Guido Günther <agx@sigxcpu.org>
2017-10-06 16:39:15 -06:00
Christian Ehrhardt
bf3a414087 virt-aa-helper: fix libusb access to udev usb data
libusb as used by qemu needs to read data from /run/udev/data/ about usb
devices. That is read once on the first initialization of libusb_init by
qemu.

Therefore generating just the device we need would not be sufficient as
another hotplug later can need another device which would fail as the
data is no more re-read at this point.

But we can restrict the paths very much to just the major number of
potential usb devices which will make it match approximately the detail
that e.g. an lsusb -v would reveal - that is much safer than the
"/run/udev/data/* r" blanket many users are using now as a workaround.

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
2017-10-06 11:14:49 +02:00
Jim Fehlig
b482925c22 apparmor: support ptrace checks
Kernel 4.13 introduced finer-grained ptrace checks

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=v4.13.2&id=290f458a4f16f9cf6cb6562b249e69fe1c3c3a07

With kernel 4.13 and apparmor 2.11, simply starting libvirtd
results in the following apparmor denial

type=AVC msg=audit(1506112085.645:954): apparmor="DENIED"
operation="ptrace" profile="/usr/sbin/libvirtd" pid=6984
comm="libvirtd" requested_mask="trace" denied_mask="trace"
peer="unconfined"

Attempting to start an unconfined domain results in

type=AVC msg=audit(1506112301.227:1112): apparmor="DENIED"
operation="ptrace" profile="/usr/sbin/libvirtd" pid=7498
comm="libvirtd" requested_mask="trace" denied_mask="trace"
peer="/usr/sbin/libvirtd"

And attempting to start a confined domain results in

type=AVC msg=audit(1506112631.408:1312): apparmor="DENIED"
operation="open" profile="virt-aa-helper" name="/etc/libnl/classid"
pid=8283 comm="virt-aa-helper" requested_mask="r" denied_mask="r"
fsuid=0 ouid=0
type=AVC msg=audit(1506112631.530:1319): apparmor="DENIED"
operation="open" profile="virt-aa-helper" name="/etc/libnl/classid"
pid=8289 comm="virt-aa-helper" requested_mask="r" denied_mask="r"
fsuid=0 ouid=0
type=AVC msg=audit(1506112632.186:1324): apparmor="DENIED"
operation="ptrace" profile="/usr/sbin/libvirtd" pid=8342
comm="libvirtd" requested_mask="trace" denied_mask="trace"
peer="libvirt-66154842-e926-4f92-92f0-1c1bf61dd1ff"

Add ptrace rules to allow the trace operations.

Resolves: https://bugzilla.suse.com/show_bug.cgi?id=1058847
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Guido Günther <agx@sigxcpu.org>
2017-09-25 12:03:35 +02:00
Julio Faracco
b06521928c storage: Add new events for *PoolBuild() and *PoolDelete().
This commit adds new events for two methods and operations: *PoolBuild() and
*PoolDelete(). Using the event-test and the commands set below we have the
following outputs:

$ sudo ./event-test
Registering event callbacks
myStoragePoolEventCallback EVENT: Storage pool test Defined 0
myStoragePoolEventCallback EVENT: Storage pool test Created 0
myStoragePoolEventCallback EVENT: Storage pool test Started 0
myStoragePoolEventCallback EVENT: Storage pool test Stopped 0
myStoragePoolEventCallback EVENT: Storage pool test Deleted 0
myStoragePoolEventCallback EVENT: Storage pool test Undefined 0

Another terminal:
$ sudo virsh pool-define test.xml
Pool test defined from test.xml

$ sudo virsh pool-build test
Pool test built

$ sudo virsh pool-start test
Pool test started

$ sudo virsh pool-destroy test
Pool test destroyed

$ sudo virsh pool-delete test
Pool test deleted

$ sudo virsh pool-undefine test
Pool test has been undefined

This commits can be a solution for RHBZ #1475227.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1475227

Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2017-09-20 11:52:56 +02:00
Guido Günther
f305d8a191 apparmor: add attach_disconnected
Otherwise we fail to reconnect to /dev/net/tun opened by libvirtd
like

    [ 8144.507756] audit: type=1400 audit(1505488162.386:38069121): apparmor="DENIED" operation="file_perm" info="Failed name lookup - disconnected path" error=-13 profile="libvirt-5dfcc8a7-b79a-4fa9-a41f-f6271651934c" name="dev/net/tun" pid=9607 comm="qemu-system-x86" requested_mask="r" denied_mask="r" fsuid=117 ouid=0

Reviewed-By: Jamie Strandboge <jamie@canonical.com>
Acked-By: Michal Privoznik <mprivozn@redhat.com>
2017-09-18 19:06:52 +02:00
intrigeri
e7f5d627f9 apparmor, libvirt-qemu: Allow QEMU to gather information about available host resources. 2017-08-11 16:57:59 -03:00
Serge Hallyn
ba326c8699 apparmor, libvirt-qemu: Allow access to certificates used by libvirt-vnc
When setting up VncTLS according to the official Libvirt documentation,
only one certificate for libvirt/libvirt-vnc is used. The document
indicates to use the following directories :

 /etc/pki/CA
 /etc/pki/libvirt
 /etc/pki/libvirt/private

in order to manage the certificates used by libvirt-vnc.

Bug-Ubuntu: https://bugs.launchpad.net/bugs/901272

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
2017-06-16 10:38:52 +02:00
Serge Hallyn
78769b8bd9 apparmor, libvirt-qemu: Allow access to ceph config
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
2017-06-16 10:38:52 +02:00
Stefan Bader
5b4d46a95e apparmor, libvirtd: Allow libxl-save-helper to run on Debian/Ubuntu
On Debian/Ubuntu the libxl-save-helper (used when saving/restoring
a domain through libxl) is located under /usr/lib/xen-<version>/bin.

Bug-Ubuntu: https://bugs.launchpad.net/bugs/1334195

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
2017-06-16 10:38:52 +02:00
Serge Hallyn
233e08c057 apparmor, libvirt-qemu: Add ppc64el related changes
Updates profile to allow running on ppc64el.

Bug-Ubuntu: https://bugs.launchpad.net/bugs/1374554

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
2017-06-16 10:38:52 +02:00
William Grant
f3b0f324eb apparmor, virt-aa-helper: Allow aarch64 UEFI.
Allow access to aarch64 UEFI images.

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Guido Günther <agx@sigxcpu.org>
2017-06-16 10:38:52 +02:00
Simon McVittie
8d4aad6412 virt-aa-helper, apparmor: allow /usr/share/OVMF/ too
The split firmware and variables files introduced by
https://bugs.debian.org/764918 are in a different directory for
some reason. Let the virtual machine read both.

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
2017-06-16 10:38:52 +02:00
Martin Kletzander
a8eba5036c qemu: Report shutdown event details
QEMU will likely report the details of it shutting down, particularly
whether the shutdown was initiated by the guest or host.  We should
forward that information along, at least for shutdown events.  Reset
has that as well, however that is not a lifecycle event and would add
extra constants that might not be used.  It can be added later on.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1384007

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2017-05-26 15:01:15 +02:00
Felix Geyer
dd875fb326 apparmor, virt-aa-helper: Explicit denies for host devices
Add explicit denies for disk devices to avoid cluttering dmesg with
(acceptable) denials.

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Guido Günther <agx@sigxcpu.org>
2017-05-19 09:48:23 +02:00
Felix Geyer
95740052ea apparmor, virt-aa-helper: Allow access to libnl-3 config files
Allow access to libnl-3 config files

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Guido Günther <agx@sigxcpu.org>
2017-05-19 09:48:23 +02:00
Michal Privoznik
1a4a4ffa3e lib: Fix c99 style comments
We prefer c89 style of comments.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2017-04-27 14:13:19 +02:00
Peter Krempa
085e794a86 lib: Introduce event for tracking disk backing file write threshold
When using thin provisioning, management tools need to resize the disk
in certain cases. To avoid having them to poll disk usage introduce an
event which will be fired when a given offset of the storage is written
by the hypervisor. Together with the API which will be added later, it
will allow registering thresholds for given storage backing volumes and
this event will then notify management if the threshold is exceeded.
2017-03-27 09:29:57 +02:00
Guido Günther
123cc3e11c apparmor: allow /usr/lib/qemu/qemu-bridge-helper
This is where e.g. Debian puts it.
2017-03-17 09:59:42 +01:00
Daniel P. Berrange
42241208d9 secret: add support for value change events
Emit an event whenever a secret value changes

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-01-09 16:42:04 +00:00
Daniel P. Berrange
dabaa05d27 examples: add secret events to event demo program
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-01-09 15:53:49 +00:00
Daniel P. Berrange
c50070173d Add domain event for metadata changes
When changing the metadata via virDomainSetMetadata, we now
emit an event to notify the app of changes. This is useful
when co-ordinating different applications read/write of
custom metadata.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-01-09 15:53:00 +00:00
Guido Günther
1a9148fbdf apparmor: pass attach_disconnected
to cure

 + virsh lxc-enter-namespace --noseclabel sl /bin/ls /bin/ls
 libvirt:  error : Expected at least one file descriptor
 error: internal error: Child process (2714) unexpected exit status 125

caused by

 apparmor="DENIED" operation="open" info="Failed name lookup - disconnected path" error=-13 profile="/usr/sbin/libvirtd" name="" pid=1422 comm="libvirtd" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
2016-12-21 06:26:31 +01:00
Michal Privoznik
3b67fc9f9f examples: Resolve sign-compare warnings
For instance:

hellolibvirt/hellolibvirt.c: In function 'showDomains':
hellolibvirt/hellolibvirt.c💯19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < numNames; i++) {
                   ^

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-12-20 13:11:25 +01:00
Erik Skultety
0c169930c0 admin: Add an example demonstrating how to use the logging APIs
Provide a simple C example demonstrating the use of both query APIs as
well as setter APIs.

Signed-off-by: Erik Skultety <eskultet@redhat.com>
2016-12-15 10:36:23 +01:00
intrigeri
a73e7037e5 AppArmor: allow QEMU to set_process_name.
https://bugzilla.redhat.com/show_bug.cgi?id=1369281

Acked-by: Christian Ehrhardt <christian.ehrhardt@canonical.co>
2016-12-12 14:08:45 +00:00
intrigeri
de79efdeb8 AppArmor policy: support merged-/usr.
Acked-by: Christian Ehrhardt <christian.ehrhardt@canonical.co>
2016-12-12 14:08:35 +00:00
Luyao Huang
aafa297044 examples: Distribute all systemtap scripts.
Due to a missing entries in Makefile, we were not distributing
all the systemtap scripts we have.

Signed-off-by: Luyao Huang <lhuang@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-10-10 15:02:38 +08:00
Cédric Bosdonnat
f03013c212 apparmor: move qemu-bridge-helper to libvirtd profile
qemu-bridge-helper is only called from libvirtd, it has to be moved
from the qemu domain abstraction to the usr.sbin.libvirtd profile.
2016-09-26 13:23:01 +02:00
Jovanka Gulicoska
43a6b37b24 Introduce node device update event as top level event
This event is emitted when a nodedev XML definition is updated,
like when cdrom media is changed in a cdrom block device.

Also includes node device update event implementation for udev
backend, virsh nodedev-event support, and event-test support
2016-08-15 08:30:56 -04:00
Jovanka Gulicoska
f803f5ff34 event-test: support node device lifecycle event APIs 2016-08-02 09:52:00 -04:00
Ján Tomko
aa7bb4f36d examples: check asprintf return value in client_info.c
On error, asprintf returns -1 and the contents of the string
pointer is undefined. In the rest of the libvirt code,
the virAsprintf wrapper takes care of that.

Check the return value and report a generic error, since we
purposefully avoid linking to virutil.
2016-07-01 15:39:01 +02:00
Erik Skultety
fbb8205de3 examples: admin: Add some examples for the new admin APIs
Some of the examples make use of asprintf and strtol functions (to keep
things simple) which are prohibited to use within our code (enforced by
syntax-check). Therefore besides adding some examples, this patch also updates
cfg.mk to exclude examples directory from asprintf and strtol rules, as well as
updates .gitignore to exclude all the new admin binaries created in the
'examples' dir.

Signed-off-by: Erik Skultety <eskultet@redhat.com>
2016-06-26 00:21:06 +02:00
Daniel P. Berrange
0330848207 Promote storage pool refresh lifecycle event to top level event
The VIR_STORAGE_POOL_EVENT_REFRESHED constant does not
reflect any change in the lifecycle of the storage pool.

It should thus not be part of the storage pool lifecycle
event set, but rather be a top level event in its own
right. Thus we introduce VIR_STORAGE_POOL_EVENT_ID_REFRESH
to replace it.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-06-24 18:26:11 +01:00
Jovanka Gulicoska
028c56631f event-test: support storage lifecycle event APIs 2016-06-16 12:22:11 -04:00
Guido Günther
2e34cb5463 apparmor: Don't scrub environment of virtlogd process
otherwise we drop variables like XDG_RUNTIME_DIR with qemu:///session
and libvirtd faild to find virtlogd's socket.
2016-06-12 13:36:28 +02:00
Jovanka Gulicoska
b29e08dbe3 More usage of virGetLastErrorMessage
Convert to virGetLastErrorMessage() in the rest of the code
2016-05-19 15:17:03 -04:00
Michal Privoznik
25866ec6a6 examples: Try harder to uninstall nwfilter
We have this code in our Makefile that tries to remove
/etc/libvirt/nwfilter if directory is left empty after all our
example nwfilters were uninstalled. However, the check for that
is missing quotation marks thus rendering the test useless:

test -z allow-arp.xml allow-dhcp-server.xml .. qemu-announce-self.xml || \
  rmdir "/some/path/libvirt.git/_install/etc/libvirt/nwfilter"
/bin/sh: line 0: test: too many arguments

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2016-04-20 17:33:55 +02:00
Peter Krempa
dc7aeeade1 event-test: Enforce domain event sync
Use verify to force adding new events by means of static assertions.
2016-04-18 16:31:30 +02:00
Peter Krempa
09b28782de event-test: Add VIR_DOMAIN_EVENT_ID_IO_ERROR_REASON
When adding the static check I've noticed that one other event is
missing.
2016-04-18 16:31:29 +02:00
Peter Krempa
cecbb0642e event-test: Add VIR_DOMAIN_EVENT_ID_DEVICE_REMOVAL_FAILED 2016-04-18 16:31:29 +02:00
Peter Krempa
9e9a5cf0f4 event-test: Add VIR_DOMAIN_EVENT_ID_JOB_COMPLETED 2016-04-18 16:31:29 +02:00
Peter Krempa
bb25001a5b event-test: Add VIR_DOMAIN_EVENT_ID_MIGRATION_ITERATION callback 2016-04-18 16:31:29 +02:00
Peter Krempa
9da32b368e event-test: Add VIR_DOMAIN_EVENT_ID_BLOCK_JOB and VIR_DOMAIN_EVENT_ID_BLOCK_JOB_2 2016-04-18 16:31:29 +02:00
Peter Krempa
e55b149169 event-test: make domain event registration declarative
Rather than copying loads of ugly code, let's help out by a few C
tricks.
2016-04-18 16:31:29 +02:00