a2476f37a7
In one of my previous patches I've tried to postpone dropping CAP_SETPCAP until the very end because it's needed for capng_apply(). What I did not realize back then was that we might not have the capability to begin with. Because of unknown reasons capng_apply() pollutes logs only for CAPNG_SELECT_BOUNDS and not for CAPNG_SELECT_CAPS. Reproducer is really simple: run libvirtd as a regular user. During its initialization, libvirtd will spawn some binaries (dnsmasq, qemu-*, etc.) and while doing so it will try to drop capabilities. Anyway, let's call capng_apply(CAPNG_SELECT_BOUNDS) only if we have the CAP_SETPCAP (which is tracked in need_setpcap variable). Fixes: 438b50dda8a863fdc988e9ab612f097cc1626e8a Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1924218 Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Cole Robinson <crobinso@redhat.com>
Libvirt API for virtualization
Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
For some of these hypervisors, it provides a stateful management daemon which runs on the virtualization host allowing access to the API both by non-privileged local users and remote users.
Layered packages provide bindings of the libvirt C API into other languages including Python, Perl, PHP, Go, Java, OCaml, as well as mappings into object systems such as GObject, CIM and SNMP.
Further information about the libvirt project can be found on the website:
License
The libvirt C API is distributed under the terms of GNU Lesser
General Public License, version 2.1 (or later). Some parts of the code
that are not part of the C library may have the more restrictive GNU
General Public License, version 2.0 (or later). See the files
COPYING.LESSER and COPYING for full license
terms & conditions.
Installation
Instructions on building and installing libvirt can be found on the website:
https://libvirt.org/compiling.html
Contributing
The libvirt project welcomes contributions in many ways. For most components the best way to contribute is to send patches to the primary development mailing list. Further guidance on this can be found on the website:
https://libvirt.org/contribute.html
Contact
The libvirt project has two primary mailing lists:
- libvirt-users@redhat.com (for user discussions)
- libvir-list@redhat.com (for development only)
Further details on contacting the project are available on the website: