[Bug 111802] SegFault missing slots in framebuffer

[Bug 111802] SegFault missing slots in framebuffer

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=111802

            Bug ID: 111802
           Summary: SegFault missing slots in framebuffer
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: not set
          Priority: not set
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: jeroen@blender.org
        QA Contact: dri-devel@lists.freedesktop.org

This fault has been detected when using Blender (2.80 or master branch)
Steps to reproduce the error:

1. Start Blender
2. Go to edit mode (press tab)
3. Start Merge vertices tool (press ALT-M)
4. Select any mode (press ENTER)

And a segmentation fault happens.
This has been tested on Mesa 18.2.2, 19.0.8 and 19.3.0~dev.

The root cause is that you have a framebuffer with multiple color slots with
empty slots in between. If there is an empty color slot between the color
slots, all textures after this slot are apparently skipped/discarded.

Our work around is to reuse empty slots with other slots.
`gpu_framebuffer_update_attachments_and_fill_empty_slots`
in
https://developer.blender.org/diffusion/B/browse/master/source/blender/gpu/intern/gpu_framebuffer.c$429-483

This issue also existed in the official AMD drivers, but has been solved to our
knowledge.

https://developer.blender.org/T70187

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[Bug 111802] SegFault missing slots in framebuffer

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=111802

GitLab Migration User <gitlab-migration@fdo.invalid> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #1 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/1432.

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