Erik Faye-Lund
eaa718588e
If we end up never taking the loop that writes ret, we can end up with
an uninitialized value, and if we're *really* unlucky, that value can
be -1, causing us to go down an error-path instead of a success path.
This was obviously not intended, so let's just initialize this to zero.
Noticed by Valgrind:
Conditional jump or move depends on uninitialised value(s)
at 0xBA640A0: virgl_drm_winsys_resource_cache_create (virgl_drm_winsys.c:348)
by 0xBA62FCF: virgl_buffer_create (virgl_buffer.c:170)
by 0xBA605AC: virgl_resource_create (virgl_resource.c:60)
by 0xBCF816F: bufferobj_data (st_cb_bufferobjects.c:344)
by 0xBCF816F: st_bufferobj_data (st_cb_bufferobjects.c:390)
by 0xBB7E836: vbo_use_buffer_objects (vbo_exec_api.c:1136)
by 0xBCFCC6E: st_create_context_priv (st_context.c:414)
by 0xBCFD3CD: st_create_context (st_context.c:590)
by 0xBBB30CA: st_api_create_context (st_manager.c:896)
by 0xB981E76: dri_create_context (dri_context.c:155)
by 0xB97BDCE: driCreateContextAttribs (dri_util.c:473)
by 0x5288331: dri3_create_context_attribs (dri3_glx.c:309)
by 0x5264D64: glXCreateContextAttribsARB (create_context.c:78)
Fixes: a8987b88ff ("virgl: add driver for virtio-gpu 3D (v2)")
Signed-off-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library
======================================================
Source
------
This repository lives at https://gitlab.freedesktop.org/mesa/mesa.
Other repositories are likely forks, and code found there is not supported.
Build status
------------
Travis:
.. image:: https://travis-ci.org/mesa3d/mesa.svg?branch=master
:target: https://travis-ci.org/mesa3d/mesa
Appveyor:
.. image:: https://img.shields.io/appveyor/ci/mesa3d/mesa.svg
:target: https://ci.appveyor.com/project/mesa3d/mesa
Coverity:
.. image:: https://scan.coverity.com/projects/139/badge.svg?flat=1
:target: https://scan.coverity.com/projects/mesa
Build & install
---------------
You can find more information in our documentation (`docs/install.html
<https://mesa3d.org/install.html>`_), but the recommended way is to use
Meson (`docs/meson.html <https://mesa3d.org/meson.html>`_):
.. code-block:: sh
$ mkdir build
$ cd build
$ meson ..
$ sudo ninja install
Support
-------
Many Mesa devs hang on IRC; if you're not sure which channel is
appropriate, you should ask your question on `Freenode's #dri-devel
<irc://chat.freenode.net#dri-devel>`_, someone will redirect you if
necessary.
Remember that not everyone is in the same timezone as you, so it might
take a while before someone qualified sees your question.
To figure out who you're talking to, or which nick to ping for your
question, check out `Who's Who on IRC
<https://dri.freedesktop.org/wiki/WhosWho/>`_.
The next best option is to ask your question in an email to the
mailing lists: `mesa-dev\@lists.freedesktop.org
<https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_
Bug reports
-----------
If you think something isn't working properly, please file a bug report
(`docs/bugs.html <https://mesa3d.org/bugs.html>`_).
Contributing
------------
Contributions are welcome, and step-by-step instructions can be found in our
documentation (`docs/submittingpatches.html
<https://mesa3d.org/submittingpatches.html>`_).
Note that Mesa uses email mailing-lists for patches submission, review and
discussions.