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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.
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Jiri Denemark c4d275c935 Don't crash if a connection closes early 
https://bugzilla.redhat.com/show_bug.cgi?id=1047577

When a client closes its connection to libvirtd early during
virConnectOpen, more specifically just after making
REMOTE_PROC_CONNECT_SUPPORTS_FEATURE call to check if
VIR_DRV_FEATURE_PROGRAM_KEEPALIVE is supported without even waiting for
the result, libvirtd may crash due to a race in keep-alive
initialization. Once receiving the REMOTE_PROC_CONNECT_SUPPORTS_FEATURE
call, the daemon's event loop delegates it to a worker thread. In case
the event loop detects EOF on the connection and calls
virNetServerClientClose before the worker thread starts to handle
REMOTE_PROC_CONNECT_SUPPORTS_FEATURE call, client->keepalive will be
disposed by the time virNetServerClientStartKeepAlive gets called from
remoteDispatchConnectSupportsFeature. Because the flow is common for
both authenticated and read-only connections, even unprivileged clients
may cause the daemon to crash.

To avoid the crash, virNetServerClientStartKeepAlive needs to check if
the connection is still open before starting keep-alive protocol.

Every libvirt release since 0.9.8 is affected by this bug.

(cherry picked from commit 173c291473)
2014-01-15 10:36:44 -07:00
.gnulib@644c40496c maint: update to latest gnulib 2013-07-29 15:59:14 -06:00
build-aux Document bracket whitespace rules & add syntax-check rule 2012-11-02 14:00:32 +00:00
daemon Fix crash in remoteDispatchDomainMemoryStats (CVE-2013-4296) 2013-09-18 14:03:38 -06:00
docs LXC: Fix handling of RAM filesystem size units 2013-10-15 13:26:55 +02:00
examples examples: fix mingw build vs. printf 2013-07-29 16:20:29 -06:00
gnulib maint: update to latest gnulib 2013-01-02 09:38:30 -07:00
include Add a virGetLastErrorMessage() function 2013-06-12 16:37:55 -04:00
m4 Fix build with clang 2013-07-29 15:59:21 -06:00
po Prep for release 1.0.5.8 2013-12-14 14:26:49 -05:00
python Return right error code for baselineCPU 2013-12-14 13:39:20 -05:00
src Don't crash if a connection closes early 2014-01-15 10:36:44 -07:00
tests tests: be more explicit on qcow2 versions in virstoragetest 2014-01-15 10:27:03 -07:00
tools libvirt-guests: Run only after libvirtd 2013-11-20 09:04:09 -05:00
.dir-locals.el build: avoid tabs that failed syntax-check 2012-09-06 09:43:46 -06:00
.gitignore Add a test suite for cgroups functionality 2013-04-15 17:35:31 +01:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap Autogenerate AUTHORS 2012-10-19 12:44:56 -04:00
AUTHORS.in Add John Ferlan to the committers list 2013-02-05 10:59:32 -05:00
autobuild.sh Disable static libraries by default 2013-04-03 11:02:27 +01:00
autogen.sh build: honor autogen.sh --no-git 2013-07-29 15:58:59 -06:00
bootstrap maint: update to latest gnulib 2013-07-29 15:59:14 -06:00
bootstrap.conf maint: update to latest gnulib 2013-07-29 15:59:14 -06:00
cfg.mk build: honor autogen.sh --no-git 2013-07-29 15:58:59 -06:00
ChangeLog-old virterror.c: Fix several spelling mistakes 2012-02-03 11:32:51 -07:00
configure.ac Prep for release 1.0.5.8 2013-12-14 14:26:49 -05:00
COPYING.LIB Update to COPYING.LIB to latest LGPLv2.1 copy 2013-03-15 10:50:32 +01:00
HACKING build: honor autogen.sh --no-git 2013-07-29 15:58:59 -06:00
libvirt.pc.in build: silence warning from autoconf 2012-05-30 09:22:02 -06:00
libvirt.spec.in Prep for release 1.0.5.8 2013-12-14 14:26:49 -05:00
Makefile.am build: Fix AUTHORS generation 2012-12-17 21:17:55 +01:00
Makefile.nonreentrant Ban use of all inet_* functions 2010-10-22 11:59:23 +01:00
mingw-libvirt.spec.in test: Return Libvirt logo as domain screenshot 2013-04-02 14:38:56 +02:00
README Correct typos in the documentation (Atsushi SAKAI) 2008-01-24 10:15:13 +00:00
README-hacking maint: relax git minimum version 2010-02-24 14:29:27 -05:00
run.in run: license as LGPL 2013-02-23 14:03:19 -07:00
TODO Update todo list file to point at bugzilla/website 2010-10-13 16:45:26 +01:00

README 

         LibVirt : simple API for virtualization

  Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.

Daniel Veillard <veillard@redhat.com>