A process can access a file if the set of MCS categories
for the file is equal-to *or* a subset-of, the set of
MCS categories for the process.
If there are two VMs:
a) svirt_t:s0:c117
b) svirt_t:s0:c117,c720
Then VM (b) is able to access files labelled for VM (a).
IOW, we must discard case where the categories are equal
because that is a subset of many other valid category pairs.
Fixes: https://gitlab.com/libvirt/libvirt/-/issues/153
CVE-2021-3631
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Mention fixing of disk iothread validation and the disk serial
truncation state.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Updated by "Update PO files to match POT (msgmerge)" hook in Weblate.
Translation: libvirt/libvirt
Translate-URL: https://translate.fedoraproject.org/projects/libvirt/libvirt/
Co-authored-by: Weblate <noreply@weblate.org>
Signed-off-by: Fedora Weblate Translation <i18n@lists.fedoraproject.org>
There are few cases where we execute a virCommand with all caps
cleared (virCommandClearCaps()). For instance
dnsmasqCapsRefreshInternal() does just that. This means, that
after fork() and before exec() the virSetUIDGIDWithCaps() is
called. But since the caller did not want to change anything,
just drop capabilities, these are the values of arguments:
virSetUIDGIDWithCaps (uid=-1, gid=-1, groups=0x0, ngroups=0,
capBits=0, clearExistingCaps=true)
This means that indeed all capabilities will be dropped,
including CAP_SETPCAP. But this capability controls whether
capabilities can be set, IOW whether capng_apply() succeeds.
There are two calls of capng_apply() in the function. The
CAP_SETPCAP is dropped after the first call and thus the other
call (capng_apply(CAPNG_SELECT_BOUNDS);) fails.
The solution is to keep the capability for as long as needed
(just like CAP_SETGID and CAP_SETUID) and drop it only at the
very end (just like CAP_SETGID and CAP_SETUID).
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1949388
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
The macro can take multiple arguments, and the calls are more efficient
if done in one go.
Signed-off-by: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
I noticed the following denial when running confined VMs with the QEMU
driver
type=AVC msg=audit(1623865089.263:865): apparmor="DENIED" operation="open" \
profile="virt-aa-helper" name="/etc/ssl/openssl.cnf" pid=12503 \
comm="virt-aa-helper" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
Allow reading the file by including the openssl abstraction in the
virt-aa-helper profile.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
I noticed the following denial messages from apparmor in audit.log when
starting confined VMs via the QEMU driver
type=AVC msg=audit(1623864006.370:837): apparmor="DENIED" operation="open" \
profile="virt-aa-helper" name="/etc/libnl/classid" pid=11265 \
comm="virt-aa-helper" requested_mask="r" denied_mask="r" fsuid=0 ouid=0
type=AVC msg=audit(1623864006.582:849): apparmor="DENIED" operation="open" \
profile="libvirt-0ca2720d-6cff-48bb-86c2-61ab9a79b6e9" \
name="/etc/libnl/classid" pid=11270 comm="qemu-system-x86" \
requested_mask="r" denied_mask="r" fsuid=107 ouid=0
It is possible for site admins to assign names to classids in this file,
which are then used by all libnl tools, possibly those used by libvirt.
To be on the safe side, allow read access to the file in the virt-aa-helper
profile and the libvirt-qemu abstraction.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Update the caps data for the upcoming qemu version.
Notable changes are:
- 'query-sev-attestation-report' command added
- 'sample-pages' members for dirty rate calculation added
- 'qtest' device added
- 'share' member added to query-memdev and 'reserve' members added to
query-memdev/memory-backend-[file,memfd,ram]
- 'qemu-vdagent' chardev added
- 'mptcp' toggle added to inet servers
- 'zstd' compression for qcow2
- new cpu models: - "Snowridge-v3"
- "Skylake-Server-v5"
- "Skylake-Client-v4"
- "Icelake-Server-v5"
- "Icelake-Client-v3"
- "Dhyana-v2"
- "Denverton-v3"
- "Cooperlake-v2"
- "Cascadelake-Server-v5"
- 'avx-vnni' added to some existing cpu models
- 'model-id' is now being reported as the host cpu again rather than
QEMU TCG as I've noted in previous bump
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
The base OS image might include outdated contents, and we don't
want to get spurious failures caused by bugs that have already been
fixed in the respective packages.
This is particularly important on macOS, because 'brew install foo'
will fail if 'foo' is already installed but outdated: upgrading all
packages first ensures we never run into this scenario.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
When 'driver_remote' is 'auto', the 'enabled()' method does not
evaluate to true, causing the libssh/libssh2 checks to be skipped.
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
The host key fingerprint for SSH servers is used in a scenario where
cryptographic strength is important. We should thus be defaulting to
use of SHA256 where available. We only need SHA1 for Ubuntu 18.04
which does not have libssh >= 0.8.1
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Iterating over all child elements of a node does not require xpath.
By doing away with xpath for this code, the code can be simplified.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Cleanup to follow. This removes the last re-use of `nodes` in this function,
eliminating two VIR_FREEs.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Iterating over all child elements of a node does not require xpath.
By doing away with xpath for this code, the code can be simplified.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
`feature` is always one of the values listed in the switch,
ensured by `virDomainKVMTypeFromString` above.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Iterating over all child elements of a node does not require xpath.
By doing away with xpath for this code, the code can be simplified.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Iterating over all child elements of a node does not require xpath.
By doing away with xpath for this code, the code can be simplified.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Iterating over all child elements of a node does not require xpath.
By doing away with xpath for this code, the code can be inlined and
simplified. This also removes the re-use of `nodes`, elimininating
two VIR_FREEs.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Vast majority of device types is not supported by the Cloud-Hypervisor
driver. Simplify the error reporting by using
virDomainDeviceTypeToString.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Now that the minimum supported Xen version has bumped to 4.9, all
uses of LIBXL_HAVE_* that are included in Xen 4.9 can be removed
from the libxl driver.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
When removing check for return value of VIR_EXPAND_N this place was
incorrectly modified causing failure to start a VM with cputune
memorytune configured with useless error message:
error: Failed to start domain 'vm1'
error: An error occurred, but the cause is unknown
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1973094
Fixes: 7d2fd6ef01
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
virISCSIDirectScanTargets now returns a GStrv, so we can use automatic
cleanup for it and get rid of the cleanup section.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Count the elements in advance rather than using VIR_APPEND_ELEMENT and
ensure that there's a NULL terminator for the string list so it's GStrv
compatible.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Using an allocated version together with copying the
host/initiator/device portions into it allows us to switch to automatic
clearing rather than open-coding it.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Instead of trying to match devices passed in based on the monitor
detecting the number of devices that were used in the domain
definition, use the deviceValidateCallback to evaluate if
unsupported devices are used.
This allows the compiler to detect when new device types are added
that need to be checked.
Signed-off-by: William Douglas <william.douglas@intel.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Originally qemuDomainAttachNetDevice() would wait until the cleanup at
the very end of the function to add newly hotplugged interfaces to the
domain's nets list. commit 7b8bec4560 modified it to add the new
interface to the nets list earlier (but not all the way at the
beginning of the function either, because there are some operations
(PCI address assignment in particular) that need the new device to not
yet be visible in the domaindef).
But hostdev interfaces short-circuit past most of the body of
qemuDomainAttachNetDevice() (since none of it applies to hostdev
interfaces). In the past that was okay, but since the line that adds
the new interface to the domaindef's nets list is in that "most of the
body", after that commit hotplugged hostdev interfaces are no longer
being properly added to the domaindef nets list, so they don't show up
in the status XML or the virsh domiflist output.
It really *is* important to add interfaces to the nets list earlier,
so we can't revert commit 7b8bec4560, and we also can't move the
insert to common code *earlier* in the function, so instead this patch
duplicates the VIR_APPEND_ELEMENT_COPY() just before the code path for
hostdev interfaces jumps to cleanup.
Resolves: https://bugzilla.redhat.com/1972468
Fixes: 7b8bec4560
Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
When determining what socket path to connect to for a given URI we will
- Connect to the driver specific daemon if its UNIX socket exists
- Connect to libvirtd if its UNIX socket exists
- If non-root, auto-spawn a daemon based on the default mode
Historically the last point would result in spawning libvirtd, but with
this change we now spawn a modular daemon. Remote client probing logic
will pick a specific hypervisor daemon to connect to when the URI is
NULL.
Tested-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Now that the remote driver itself can probe for listening sockets /
running daemons, virtproxyd doesn't need to probe URIs itself. Instead
it can just delegate to the remote driver.
Tested-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
