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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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Dario Faggioli d5f89a6dd7 libxl: avoid crashing if calling `virsh numatune' on inactive domain 
by, in libxlDomainGetNumaParameters(), calling libxl_bitmap_init() as soon as
possible, which avoids getting to 'cleanup:', where libxl_bitmap_dispose()
happens, without having initialized the nodemap, and hence crashing after some
invalid free()-s:

 # ./daemon/libvirtd -v
 *** Error in `/home/xen/libvirt.git/daemon/.libs/lt-libvirtd': munmap_chunk(): invalid pointer: 0x00007fdd42592666 ***
 ======= Backtrace: =========
 /lib64/libc.so.6(+0x7bbe7)[0x7fdd3f767be7]
 /lib64/libxenlight.so.4.3(libxl_bitmap_dispose+0xd)[0x7fdd2c88c045]
 /home/xen/libvirt.git/daemon/.libs/../../src/.libs/libvirt_driver_libxl.so(+0x12d26)[0x7fdd2caccd26]
 /home/xen/libvirt.git/src/.libs/libvirt.so.0(virDomainGetNumaParameters+0x15c)[0x7fdd4247898c]
 /home/xen/libvirt.git/daemon/.libs/lt-libvirtd(+0x1d9a2)[0x7fdd42ecc9a2]
 /home/xen/libvirt.git/src/.libs/libvirt.so.0(virNetServerProgramDispatch+0x3da)[0x7fdd424e9eaa]
 /home/xen/libvirt.git/src/.libs/libvirt.so.0(+0x1a6f38)[0x7fdd424e3f38]
 /home/xen/libvirt.git/src/.libs/libvirt.so.0(+0xa81e5)[0x7fdd423e51e5]
 /home/xen/libvirt.git/src/.libs/libvirt.so.0(+0xa783e)[0x7fdd423e483e]
 /lib64/libpthread.so.0(+0x7c53)[0x7fdd3febbc53]
 /lib64/libc.so.6(clone+0x6d)[0x7fdd3f7e1dbd]

Signed-off-by: Dario Faggili <dario.faggioli@citrix.com>
Cc: Jim Fehlig <jfehlig@suse.com>
Cc: Ian Jackson <Ian.Jackson@eu.citrix.com>
(cherry picked from commit f9ee91d355)

Conflicts:
	src/libxl/libxl_driver.c
2013-12-28 16:49:31 -06:00
.gnulib@644c40496c maint: update to latest gnulib 2013-07-19 05:53:02 -06:00
build-aux Add API for calling systemd-machined's DBus API 2013-07-22 13:09:58 +01:00
daemon Fix max stream packet size for old clients 2013-10-01 13:58:23 +01:00
docs LXC: Fix handling of RAM filesystem size units 2013-10-15 13:14:55 +02:00
examples examples: fix mingw build vs. printf 2013-07-29 12:53:36 -06:00
gnulib maint: use LGPL correctly 2013-05-20 14:03:48 -06:00
include Rename VIR_DOMAIN_PAUSED_GUEST_PANICKED to VIR_DOMAIN_PAUSED_CRASHED 2013-07-29 18:08:55 +01:00
m4 Fix build with clang 2013-07-04 11:35:59 +02:00
po Release of libvirt-1.1.1 2013-07-30 17:38:35 +08:00
python python: Drop TODO 2013-07-29 07:54:18 -04:00
src libxl: avoid crashing if calling `virsh numatune' on inactive domain 2013-12-28 16:49:31 -06:00
tests build: Add lxc testcase to dist list 2013-10-15 15:58:10 +02:00
tools virsh: Fix debugging 2013-10-18 08:56:22 +02:00
.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 Add API for calling systemd-machined's DBus API 2013-07-22 13:09:58 +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 Set PKG_CONFIG_LIBDIR in autobuild.sh 2013-05-17 17:09:29 +01:00
autogen.sh autogen: Handle case when libvirt's submodule 2013-07-19 13:45:22 +02:00
bootstrap maint: update to latest gnulib 2013-07-19 05:53:02 -06:00
bootstrap.conf maint: update to latest gnulib 2013-07-19 05:53:02 -06:00
cfg.mk maint: split long lines in Makefiles 2013-07-19 05:25:35 -06:00
ChangeLog-old virterror.c: Fix several spelling mistakes 2012-02-03 11:32:51 -07:00
configure.ac Add support for using 3-arg pkcheck syntax for process (CVE-2013-4311) 2013-09-18 16:09:02 +01:00
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 Adapt to VIR_ALLOC and virAsprintf in docs/ 2013-07-10 11:07:31 +02:00
libvirt.pc.in build: silence warning from autoconf 2012-05-30 09:22:02 -06:00
libvirt.spec.in Add support for using 3-arg pkcheck syntax for process (CVE-2013-4311) 2013-09-18 16:09:02 +01:00
Makefile.am maint: split long lines in Makefiles 2013-07-19 05:25:35 -06:00
Makefile.nonreentrant maint: use LGPL correctly 2013-05-20 14:03:48 -06:00
mingw-libvirt.spec.in conf: add features to volume target XML 2013-06-21 13:25:30 +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>