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83ed40cdcd
In the case where u_index_generator returns zero new vertices, we never
filled tmp_indices before trying to duplicate the last veretx. This
causes us to read unitialized memory.
This fixes a Valgrind issue triggering in glxgears on Zink:
---8<---
==296461== Invalid read of size 2
==296461== at 0x570F335: compile_vertex_list (vbo_save_api.c:733)
==296461== by 0x570FEFB: wrap_buffers (vbo_save_api.c:1021)
==296461== by 0x571050A: upgrade_vertex (vbo_save_api.c:1134)
==296461== by 0x571050A: fixup_vertex (vbo_save_api.c:1251)
==296461== by 0x57114D1: _save_Normal3f (vbo_attrib_tmp.h:315)
==296461== by 0x10B750: ??? (in /usr/bin/glxgears)
==296461== by 0x10A2CC: ??? (in /usr/bin/glxgears)
==296461== by 0x4B3F30F: (below main) (in /usr/lib/libc.so.6)
==296461== Address 0x11ca23de is 2 bytes before a block of size 1,968 alloc'd
==296461== at 0x4845899: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==296461== by 0x570E647: compile_vertex_list (vbo_save_api.c:604)
==296461== by 0x570FEFB: wrap_buffers (vbo_save_api.c:1021)
==296461== by 0x571050A: upgrade_vertex (vbo_save_api.c:1134)
==296461== by 0x571050A: fixup_vertex (vbo_save_api.c:1251)
==296461== by 0x57114D1: _save_Normal3f (vbo_attrib_tmp.h:315)
==296461== by 0x10B750: ??? (in /usr/bin/glxgears)
==296461== by 0x10A2CC: ??? (in /usr/bin/glxgears)
==296461== by 0x4B3F30F: (below main) (in /usr/lib/libc.so.6)
---8<---
Fixes:
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||
|---|---|---|
| .gitlab/issue_templates | ||
| .gitlab-ci | ||
| android | ||
| bin | ||
| build-support | ||
| docs | ||
| include | ||
| src | ||
| subprojects | ||
| .dir-locals.el | ||
| .editorconfig | ||
| .gitattributes | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .mailmap | ||
| .travis.yml | ||
| CODEOWNERS | ||
| meson.build | ||
| meson_options.txt | ||
| README.rst | ||
| VERSION | ||
`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 & install --------------- You can find more information in our documentation (`docs/install.rst <https://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <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 `OFTC's #dri-devel <irc://irc.oftc.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.rst <https://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.