Segfault/Crash when rendering VDBs in Cycles Linux

[redhoot-dev]

Version: Gaffer 1.4.1.0-linux-gcc11
Third-party tools: Gaffer Deadline
Third-party modules: None

Description

Simple setup, trying to render a small vdb (or any other I have on disk) results in a crash.
Interactive mode seg faults and crashes while doing a local dispatch render outputs:

Tried various shaders, and connecting the density parameters. All results in the same crash.

INFO    [Render] Executing frame 1
INFO    [Render] Cycles : Mem:0.000G, Peak:0.000G | Waiting for render to start
INFO    [Render] Cycles : Mem:0.000G, Peak:0.000G | Loading render kernels (may take a few minutes the first time)
INFO    [Render] Cycles : Mem:0.000G, Peak:0.000G | Updating Scene
INFO    [Render] Cycles : Mem:0.000G, Peak:0.000G | Updating Shaders
INFO    [Render] Cycles : Mem:0.000G, Peak:0.000G | Updating Procedurals
INFO    [Render] Cycles : Mem:0.000G, Peak:0.000G | Updating Background
INFO    [Render] Cycles : Mem:0.000G, Peak:0.000G | Updating Camera
INFO    [Render] Cycles : Mem:0.000G, Peak:0.000G | Updating Meshes Flags
INFO    [Render] Cycles : Mem:0.000G, Peak:0.000G | Updating Meshes Volume Bounds
INFO    [Render] Cycles : Mem:0.000G, Peak:0.000G | Updating Volume Images
INFO    [Render] Cycles : Mem:0.000G, Peak:0.000G | Updating Mesh: Computing Volume Mesh /group/vdb
ERROR   [Render] Execution failed for frame 1
INFO    [gaffer_141_cyclesVdbCrash 000004] Status.Failed

Steps to reproduce

Download the script to see.
https://drive.google.com/drive/folders/1e1hdsMcCDkkX-yGXY9jKU-UP3THPU7fC?usp=drive_link

Debug log

Click to Expand

[boberfly]

I suspect the VDB code hasn't changed much, #5373 was the code to get it to work, but needs rebasing and the unit test to function.

[johnhaddon]

I spent a tiny bit of time looking at this on Friday. With a rebased #5373 the crash is gone, but interactive shader updates don't seem to take effect without a renderer restart. There's a lot of stuff bundled up into that one commit in that PR, so I'll need to find some time to pick it apart and rebuild it...

[statixVFX]

Just confirming whats been said on discord. The GafferCycles build from Alex previously worked OK in regards to rendering VDBs and doing shader (parameters) updates in an interactive session.

[rahbari70]

i have same issue on windows 11, cycles crash when try to render vdb. i try to load vdb from embergen and cycles crash in cpu or gpu . both have issue.

[Shimoon]

I have the same issue on Windows 10. But it seems to crash only if the vdb is being shaded.