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8361d335ab
If there's a list of mdevs to be assigned to a domain, but one of them (NOT the first) is already assigned to a different domain we're going to crash in the qemuProcessStop phase in virMediatedDeviceListFindIndex, because some of the pointers in mgr->activeMediatedHostdevs are dangling. This is due to virMediatedDeviceListMarkDevices using cleanup instead of rollback when we find out that a device is already taken. Reproducer steps: 1. start vm1 with mdev1 2. start vm2 with mdev2, mdev1 (the order is important!) Backtrace: #0 0x0000ffffb8c36250 in strcmp #1 0x0000ffffb9b80754 in virMediatedDeviceListFindIndex #2 0x0000ffffb9b80870 in virMediatedDeviceListFind #3 0x0000ffffb9c9e168 in virHostdevReAttachMediatedDevices #4 0x0000ffff9949f724 in qemuHostdevReAttachMediatedDevices #5 0x0000ffff9949f7f8 in qemuHostdevReAttachDomainDevices #6 0x0000ffff994bcd70 in qemuProcessStop #7 0x0000ffff994bf4e0 in qemuProcessStart Signed-off-by: Binfeng Wu <wubinfeng@huawei.com> Reviewed-by: Erik Skultety <eskultet@redhat.com>
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==============================
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:
https://libvirt.org
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:
https://libvirt.org/contact.html