Subdivision surface modifier causes crash #95582

System Information
Operating system: Linux-5.13.0-28-generic-x86_64-with-glibc2.34 64 Bits
Graphics card: llvmpipe (LLVM 12.0.1, 256 bits) Mesa/X.org 4.5 (Core Profile) Mesa 21.2.2

Blender Version
Broken: version: 3.2.0 Alpha, branch: master, commit date: 2022-02-07 11:18, hash: b3bb51dd83
Worked: 3.2.0 Alpha, branch: master, commit date: 2022-02-07 11:18, hash: b3bb51dd83 on Windows11.

Short description of error
[Please fill out a short description of the error here]
Subdivision surface modifier causes crash on

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]
Start blender then apply Subdivision surface modifier.

blender.crash.txt

Added subscriber: @jmztn

Added subscriber: @OmarEmaraDev

Changed status from 'Needs Triage' to: 'Needs User Info'

I can't replicate that.
Does the crash happen when you add the modifier or when you apply it?
It works on Windows but not on Linux?
Can you try on a GPU driver instead of LLVMpipe?

The crash happens when I add the modifier.
Yes, it works on Windows 11 but not on Linux.
I tried Reder Devices:None and Optix:RTX3070 both crash.

I got messages below.

$ blender --factory-startup
ERROR (gpu.shader): subdiv patch evaluation limit normals Linking:

    | Error: Too many compute shader storage blocks (9/8)

Writing: /tmp/blender.crash.txt
Segmentation fault (core dumped)

Changed status from 'Needs User Info' to: 'Confirmed'

Added subscriber: @kevindietrich

Looks like LLVMpipe defines a limit of 8 SSBO blocks. Maybe MAX_COMPUTE_SHADER_STORAGE_BLOCKS should be considered when testing for GPU capabilities. @kevindietrich

I reboot the system.
It worked fine.

I'm sorry to trouble you.

Changed status from 'Confirmed' to: 'Archived'

Alright. I guess there was a fallback to software rasterization and it was no longer needed after reboot.

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Subdivision surface modifier causes crash #95582