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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 2328d9a850 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)
2014-01-14 21:41:54 -07:00
.gnulib@4a5ee89c8a maint: update to latest gnulib 2013-09-24 06:53:07 -06:00
build-aux Add API for calling systemd-machined's DBus API 2013-07-22 13:09:58 +01:00
daemon Remove all direct use of getenv 2013-10-29 16:13:03 +00:00
docs LXC: Fix handling of RAM filesystem size units 2013-10-15 12:58:52 +02:00
examples Don't link virt-login-shell against libvirt.so (CVE-2013-4400) 2013-10-21 14:19:05 +01:00
gnulib Don't link virt-login-shell against libvirt.so (CVE-2013-4400) 2013-10-21 14:19:05 +01:00
include libvirt: add new public API virConnectGetCPUModelNames 2013-09-23 15:41:50 -06:00
m4 maint: update to latest gnulib 2013-09-24 06:53:07 -06:00
po Prep for release 1.1.3.2 2013-12-14 14:26:46 -05:00
python Return right error code for baselineCPU 2013-12-14 13:39:42 -05:00
src Don't crash if a connection closes early 2014-01-14 21:41:54 -07:00
tests qemu: don't use deprecated -no-kvm-pit-reinjection 2013-11-13 10:33:44 +01:00
tools libvirt-guests: Run only after libvirtd 2013-11-20 09:03:52 -05:00
.ctags maint: Make ctags work out of the box 2013-07-18 08:47:21 +02:00
.dir-locals.el build: avoid tabs that failed syntax-check 2012-09-06 09:43:46 -06:00
.gitignore Fix flaw in detecting log format 2013-10-29 16:10:22 +00:00
.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 build: make autobuild require rpm build deps 2013-09-16 09:35:05 -06:00
autogen.sh autogen.sh: Correctly detect .git as a file 2013-08-29 13:19:45 +02:00
bootstrap maint: update to latest gnulib 2013-09-24 06:53:07 -06:00
bootstrap.conf Add helpers for getting env vars in a setuid environment 2013-10-21 14:18:47 +01:00
cfg.mk Block all use of getenv with syntax-check 2013-10-29 16:14:00 +00:00
ChangeLog-old docs, comments: minor typo fixes 2013-09-10 17:06:41 -06:00
config-post.h build: fix build of virt-login-shell on systems with older gnutls 2013-10-23 09:02:38 +01:00
configure.ac Prep for release 1.1.3.2 2013-12-14 14:26:46 -05:00
COPYING maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
COPYING.LESSER maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
HACKING docs: mention VIR_TEST_RANGE 2013-08-12 20:44:41 -06:00
libvirt.pc.in Add missing 'libvirt_lxc_api' variable in pkg-config file 2013-09-04 14:52:40 +01:00
libvirt.spec.in Prep for release 1.1.3.2 2013-12-14 14:26:46 -05:00
Makefile.am Don't link virt-login-shell against libvirt.so (CVE-2013-4400) 2013-10-21 14:19:05 +01:00
Makefile.nonreentrant maint: use LGPL correctly 2013-05-20 14:03:48 -06:00
mingw-libvirt.spec.in build: add configure option to disable gnulib tests 2013-08-12 10:02:38 -06:00
README
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>