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Mark Nelson e28ffe90fd util/guest-random: Fix size arg to tail memcpy
We know that in the body of this if statement i is less than len, so
we really should be copying len - i bytes not i - len bytes.

Fix this typo.

Fixes: 8d8404f156 ("util: Add qemu_guest_getrandom and associated routines")
Signed-off-by: Mark Nelson <mdnelson8@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210709120600.11080-1-mdnelson8@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-07-09 18:42:46 +02:00
.github Update documentation to refer to new location for issues 2021-06-21 05:43:11 +02:00
.gitlab/issue_templates GitLab: Add "Feature Request" issue template. 2021-06-25 10:08:37 +01:00
.gitlab-ci.d python: rename 'venv-check' target to 'check-pipenv' 2021-06-30 21:54:04 -04:00
accel tcg: Use correct trap number for page faults on *BSD systems 2021-06-29 10:04:57 -07:00
audio coreaudio: Lock only the buffer 2021-06-23 14:16:48 +02:00
authz configure, meson: convert pam detection to meson 2021-06-25 10:54:10 +02:00
backends vhost: Add Error parameter to vhost_dev_init() 2021-06-30 13:15:44 +02:00
block block/io: Merge discard request alignments 2021-07-06 14:28:55 +01:00
bsd-user accel/tcg: Merge tcg_exec_init into tcg_init_machine 2021-06-11 09:26:28 -07:00
capstone@f8b1b83301
chardev chardev/socket: Use qcrypto_tls_creds_check_endpoint() 2021-06-29 18:30:17 +01:00
contrib vhost-user-gpu: reorder free calls. 2021-06-15 07:16:25 +02:00
crypto crypto: Make QCryptoTLSCreds* structures private 2021-06-29 18:30:24 +01:00
default-configs
disas
docs pc,pci,virtio: bugfixes, improvements 2021-07-09 14:30:01 +01:00
dtc@85e5d83984
dump
ebpf ebpf: Added eBPF RSS loader. 2021-06-04 15:25:46 +08:00
fpu softfloat: Use _Generic instead of QEMU_GENERIC 2021-06-16 15:03:26 +02:00
fsdev
gdb-xml
hw hw/virtio: Document *_should_notify() are called within rcu_read_lock() 2021-07-09 18:42:46 +02:00
include Pull request 2021-07-08 22:17:28 +01:00
io sockets: Support multipath TCP 2021-06-08 19:36:22 +01:00
libdecnumber
linux-headers Update Linux headers to 5.13-rc4 2021-06-17 14:11:06 -04:00
linux-user linux-user/syscall: Remove hardcoded tabs (code style) 2021-07-07 21:34:21 +02:00
meson@776acd2a80
migration migration: fix typo in mig_throttle_guest_down comment 2021-07-09 18:42:46 +02:00
monitor tpm: Return QMP error when TPM is disabled in build 2021-06-15 10:59:02 -04:00
nbd nbd/client-connection: add option for non-blocking connection attempt 2021-06-18 12:21:22 -05:00
net Fixed calculation error of pkt->header_size in fill_pkt_tcp_info() 2021-06-11 10:30:13 +08:00
pc-bios pc-bios: Update the palcode-clipper image 2021-06-28 07:27:32 -07:00
plugins plugins/api: expose symbol lookup to plugins 2021-06-25 10:08:37 +01:00
po
python python: Fix broken ReST docstrings 2021-06-30 21:57:08 -04:00
qapi block/ssh: add support for sha256 host key fingerprints 2021-06-30 12:45:32 +02:00
qga
qobject
qom qom: export more functions for use with non-UserCreatable objects 2021-07-06 08:33:51 +02:00
replay
roms pc-bios: Update the palcode-clipper image 2021-06-28 07:27:32 -07:00
scripts Set icon for QEMU binary on Mac OS 2021-07-06 09:35:08 +02:00
scsi docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
semihosting
slirp@8f43a99191
softmmu misc: Remove redundant new line in perror() 2021-07-09 18:42:46 +02:00
storage-daemon
stubs async: the main AioContext is only "current" if under the BQL 2021-06-18 10:59:52 -05:00
subprojects/libvhost-user
target target/xtensa/xtensa-semi: Fix compilation problem on Haiku 2021-07-09 18:42:46 +02:00
tcg misc: Fix "havn't" typo 2021-07-09 18:42:46 +02:00
tests pc,pci,virtio: bugfixes, improvements 2021-07-09 14:30:01 +01:00
tools virtiofsd: Add missing newline in error message 2021-07-09 18:42:46 +02:00
trace
ui ui/vnc: Use qcrypto_tls_creds_check_endpoint() 2021-06-29 18:30:22 +01:00
util util/guest-random: Fix size arg to tail memcpy 2021-07-09 18:42:46 +02:00
.cirrus.yml
.dir-locals.el
.editorconfig
.exrc
.gdbinit
.gitattributes
.gitignore
.gitlab-ci.yml gitlab: Run Avocado tests manually (except mainstream CI) 2021-05-27 16:39:23 +02:00
.gitmodules
.gitpublish
.mailmap
.patchew.yml scripts/checkpatch: roll diff tweaking into checkpatch itself 2021-06-25 10:08:33 +01:00
.readthedocs.yml
.travis.yml
block.c block: Allow changing bs->file on reopen 2021-06-29 16:51:00 +02:00
blockdev-nbd.c block/nbd: Use qcrypto_tls_creds_check_endpoint() 2021-06-29 18:29:47 +01:00
blockdev.c block: drop BlockBackendRootState::read_only 2021-06-02 14:23:20 +02:00
blockjob.c progressmeter: protect with a mutex 2021-06-25 14:24:24 +03:00
configure config-host.mak: remove unused compiler-related lines 2021-07-06 09:35:08 +02:00
COPYING
COPYING.LIB
cpu.c cpu: Move CPUClass::vmsd to SysemuCPUOps 2021-05-26 15:33:59 -07:00
cpus-common.c
disas.c
gdbstub.c
gitdm.config
hmp-commands-info.hx hmp: Add "calc_dirty_rate" and "info dirty_rate" cmds 2021-06-08 20:18:26 +01:00
hmp-commands.hx netdev: add more commands to preconfig mode 2021-06-11 10:30:13 +08:00
iothread.c async: the main AioContext is only "current" if under the BQL 2021-06-18 10:59:52 -05:00
job-qmp.c progressmeter: protect with a mutex 2021-06-25 14:24:24 +03:00
job.c progressmeter: protect with a mutex 2021-06-25 14:24:24 +03:00
Kconfig
Kconfig.host
LICENSE
MAINTAINERS pc,pci,virtio: bugfixes, improvements 2021-07-09 14:30:01 +01:00
Makefile Makefile: Remove /usr/bin/env wrapper from the SHELL variable 2021-07-05 19:20:46 +02:00
memory_ldst.c.inc
meson_options.txt configure, meson: convert libxml2 detection to meson 2021-07-06 08:33:51 +02:00
meson.build config-host.mak: remove unused compiler-related lines 2021-07-06 09:35:08 +02:00
module-common.c
os-posix.c
os-win32.c
page-vary-common.c
page-vary.c
qemu-bridge-helper.c
qemu-edid.c
qemu-img-cmds.hx
qemu-img.c progressmeter: protect with a mutex 2021-06-25 14:24:24 +03:00
qemu-io-cmds.c qemu-io-cmds: assert that we don't have .perm requested in no-blk case 2021-06-02 14:23:20 +02:00
qemu-io.c
qemu-keymap.c
qemu-nbd.c qemu-nbd: Use qcrypto_tls_creds_check_endpoint() 2021-06-29 18:29:49 +01:00
qemu-options.hx qemu-options: Improve the documentation of the -display options 2021-07-05 19:21:07 +02:00
qemu.nsi
qemu.sasl sasl: remove comment about obsolete kerberos versions 2021-06-14 13:28:50 +01:00
README.rst Update documentation to refer to new location for issues 2021-06-21 05:43:11 +02:00
replication.c
thunk.c
trace-events docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
VERSION
version.rc

===========
QEMU README
===========

QEMU is a generic and open source machine & userspace emulator and
virtualizer.

QEMU is capable of emulating a complete machine in software without any
need for hardware virtualization support. By using dynamic translation,
it achieves very good performance. QEMU can also integrate with the Xen
and KVM hypervisors to provide emulated hardware while allowing the
hypervisor to manage the CPU. With hypervisor support, QEMU can achieve
near native performance for CPUs. When QEMU emulates CPUs directly it is
capable of running operating systems made for one machine (e.g. an ARMv7
board) on a different machine (e.g. an x86_64 PC board).

QEMU is also capable of providing userspace API virtualization for Linux
and BSD kernel interfaces. This allows binaries compiled against one
architecture ABI (e.g. the Linux PPC64 ABI) to be run on a host using a
different architecture ABI (e.g. the Linux x86_64 ABI). This does not
involve any hardware emulation, simply CPU and syscall emulation.

QEMU aims to fit into a variety of use cases. It can be invoked directly
by users wishing to have full control over its behaviour and settings.
It also aims to facilitate integration into higher level management
layers, by providing a stable command line interface and monitor API.
It is commonly invoked indirectly via the libvirt library when using
open source applications such as oVirt, OpenStack and virt-manager.

QEMU as a whole is released under the GNU General Public License,
version 2. For full licensing details, consult the LICENSE file.


Documentation
=============

Documentation can be found hosted online at
`<https://www.qemu.org/documentation/>`_. The documentation for the
current development version that is available at
`<https://www.qemu.org/docs/master/>`_ is generated from the ``docs/``
folder in the source tree, and is built by `Sphinx
<https://www.sphinx-doc.org/en/master/>_`.


Building
========

QEMU is multi-platform software intended to be buildable on all modern
Linux platforms, OS-X, Win32 (via the Mingw64 toolchain) and a variety
of other UNIX targets. The simple steps to build QEMU are:


.. code-block:: shell

  mkdir build
  cd build
  ../configure
  make

Additional information can also be found online via the QEMU website:

* `<https://qemu.org/Hosts/Linux>`_
* `<https://qemu.org/Hosts/Mac>`_
* `<https://qemu.org/Hosts/W32>`_


Submitting patches
==================

The QEMU source code is maintained under the GIT version control system.

.. code-block:: shell

   git clone https://gitlab.com/qemu-project/qemu.git

When submitting patches, one common approach is to use 'git
format-patch' and/or 'git send-email' to format & send the mail to the
qemu-devel@nongnu.org mailing list. All patches submitted must contain
a 'Signed-off-by' line from the author. Patches should follow the
guidelines set out in the `style section
<https://www.qemu.org/docs/master/devel/style.html>` of
the Developers Guide.

Additional information on submitting patches can be found online via
the QEMU website

* `<https://qemu.org/Contribute/SubmitAPatch>`_
* `<https://qemu.org/Contribute/TrivialPatches>`_

The QEMU website is also maintained under source control.

.. code-block:: shell

  git clone https://gitlab.com/qemu-project/qemu-web.git

* `<https://www.qemu.org/2017/02/04/the-new-qemu-website-is-up/>`_

A 'git-publish' utility was created to make above process less
cumbersome, and is highly recommended for making regular contributions,
or even just for sending consecutive patch series revisions. It also
requires a working 'git send-email' setup, and by default doesn't
automate everything, so you may want to go through the above steps
manually for once.

For installation instructions, please go to

*  `<https://github.com/stefanha/git-publish>`_

The workflow with 'git-publish' is:

.. code-block:: shell

  $ git checkout master -b my-feature
  $ # work on new commits, add your 'Signed-off-by' lines to each
  $ git publish

Your patch series will be sent and tagged as my-feature-v1 if you need to refer
back to it in the future.

Sending v2:

.. code-block:: shell

  $ git checkout my-feature # same topic branch
  $ # making changes to the commits (using 'git rebase', for example)
  $ git publish

Your patch series will be sent with 'v2' tag in the subject and the git tip
will be tagged as my-feature-v2.

Bug reporting
=============

The QEMU project uses GitLab issues to track bugs. Bugs
found when running code built from QEMU git or upstream released sources
should be reported via:

* `<https://gitlab.com/qemu-project/qemu/-/issues>`_

If using QEMU via an operating system vendor pre-built binary package, it
is preferable to report bugs to the vendor's own bug tracker first. If
the bug is also known to affect latest upstream code, it can also be
reported via GitLab.

For additional information on bug reporting consult:

* `<https://qemu.org/Contribute/ReportABug>`_


ChangeLog
=========

For version history and release notes, please visit
`<https://wiki.qemu.org/ChangeLog/>`_ or look at the git history for
more detailed information.


Contact
=======

The QEMU community can be contacted in a number of ways, with the two
main methods being email and IRC

* `<mailto:qemu-devel@nongnu.org>`_
* `<https://lists.nongnu.org/mailman/listinfo/qemu-devel>`_
* #qemu on irc.oftc.net

Information on additional methods of contacting the community can be
found online via the QEMU website:

* `<https://qemu.org/Contribute/StartHere>`_