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Ian Romanick 844314f39b mesa: Fix segfaults in _mesa_delete_program and _mesa_reference_program_
`_mesa_delete_program` and `_mesa_reference_program_` both use fields
in `sh` without determining whether `sh` or `arb` is valid. Herein
lies the problem. I cannot see any reliable way to determine which is
valid without knowing what call path you are in.

There are two possible methods, but neither seems particularly
reliable. We could check whether `shader_program` is `NULL`, or we
could check whether `Parameters` (only used for ARB assembly shaders)
is `NULL`.

Instead of doing that, I chose to add a new field that captures the
`is_arb_asm` parameter already passed to `_mesa_init_gl_program`. This
seemed the most reliable. It is possible that more
`assert(!prog->is_arb_asm)` and `assert(prog->is_arb_asm)` should be
sprinkled throughout the code base.

I don't know how this has not already been a problem. Starting with
492a176cbb ("util: increase SHA1_DIGEST_LENGTH to 32
(BLAKE3_KEY_LEN)"), I observed segfaults in
`_mesa_uniform_detach_all_driver_storage` while freeing ARB assembly
shaders. Those shaders should never hit this path.

Not all assembly shaders hit this path. In fact, **nothing** in the
open shader-db encounters this problem. This is presumably why
pre-merge CI didn't catch this problem. In my closed shader-db,
shaders from the following applications hit this:

 - rocketbirds-hardboiled-chicken
 - shadowrun-returns
 - windward
 - ziggurat

I believe it was just blind luck that most of the time the fields of
`sh::data` that were access through this path, `sh::BindlessSamplers`,
and `sh::BindlessImages` happened to line up with fields of `arb` that
contained `NULL`. Changing the size of the hash key changed that luck.

Fixes: ca16c271fa ("mesa: make struct in gl_program a union and remove FIXME")
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
(cherry picked from commit 884cf1d39e)

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39462>
2026-01-14 10:22:59 -08:00
.ci-farms Revert "ci: disable Collabora's farm due to maintenance" 2025-10-06 13:00:52 +02:00
.ci-farms-disabled Revert "ci: disable Collabora's farm due to maintenance" 2025-10-06 13:00:52 +02:00
.github/workflows meson: remove unused osmesa option 2025-06-23 06:42:50 +00:00
.gitlab docs: update gitlab docs urls 2025-02-23 00:31:59 +01:00
.gitlab-ci Revert "ci/android: add sudo to EPHEMERAL deps for debian/x86_64_test-android.sh" 2026-01-09 12:40:33 -08:00
.marge/hooks ci: pipeline_message: reset empty errors 2025-01-07 05:08:10 +00:00
android android: fix building rules for i915, r300 2025-10-08 23:43:33 +02:00
bin bin/symbols-check: Fix undefined symbol detection on macOS 2025-12-28 18:58:23 -08:00
build-support meson: move tsan-blacklist.txt to build-support with the other build support files 2024-05-01 07:05:12 +00:00
docs docs: Add 25.3.3 checksums 2026-01-01 12:39:10 -08:00
include drm-uapi: Import the new NVIDIA modifiers 2025-11-13 08:10:17 -08:00
licenses licenses: add missing licenses 2025-01-08 20:37:51 +00:00
src mesa: Fix segfaults in _mesa_delete_program and _mesa_reference_program_ 2026-01-14 10:22:59 -08:00
subprojects rust: build ucd-trie dependency with the correct edition 2025-12-16 09:49:04 -08:00
.clang-format
.clang-format-ignore ci: enforce formatting for RADV & ACO 2023-06-16 19:59:52 +00:00
.clang-format-include ethos: Initial commit of a driver for the Arm Ethos-U65 NPU. 2025-10-15 20:10:15 +00:00
.dir-locals.el
.editorconfig editorconfig: move OpenCL configuration to root 2025-08-30 22:49:08 -07:00
.git-blame-ignore-revs freedreno: Add register renaming to .git-blame-ignore-revs 2025-07-03 12:50:04 +00:00
.gitattributes gitlab: Highlight .cl as C 2023-11-02 11:37:46 +00:00
.gitignore intel/mda: Add code to produce mesa debug archives 2025-09-24 23:08:45 -07:00
.gitlab-ci.yml ci: use $CI_TRON_JOB_PRIORITY tag on all ci-tron jobs 2025-12-01 09:16:33 -08:00
.graphqlrc.yml
.mailmap mailmap: Update for Dylan Baker 2025-09-16 19:45:15 +00:00
.mr-label-maker.yml mr-label-maker.yml: remove remaining osmesa occurrences 2025-06-23 06:42:50 +00:00
.pick_status.json mesa: Fix segfaults in _mesa_delete_program and _mesa_reference_program_ 2026-01-14 10:22:59 -08:00
.shellcheckrc ci: move shellcheck options to .shellcheckrc 2024-10-24 22:43:03 +00:00
CODEOWNERS intel: update code owners 2025-08-31 15:38:27 +00:00
meson.build vk/runtime,zink: only integrate renderdoc on supported platforms 2026-01-08 07:49:54 -08:00
meson.options rusticl: fix 'enable-drivers' meson option 2026-01-06 08:09:39 -08:00
README.rst docs: Match README installation guide with meson.rst 2024-07-27 11:53:53 +00:00
rustfmt.toml mesa: Add rustfmt.toml 2024-11-18 22:29:14 +00:00
VERSION VERSION: bump for 25.3.3 2026-01-01 10:34:04 -08:00

`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://docs.mesa3d.org/install.html>`_), but the recommended way is to use
Meson (`docs/meson.rst <https://docs.mesa3d.org/meson.html>`_):

.. code-block:: sh

  $ meson setup build
  $ ninja -C build/
  $ sudo ninja -C build/ 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://docs.mesa3d.org/bugs.html>`_).


Contributing
------------

Contributions are welcome, and step-by-step instructions can be found in our
documentation (`docs/submittingpatches.rst
<https://docs.mesa3d.org/submittingpatches.html>`_).

Note that Mesa uses gitlab for patches submission, review and discussions.