Crash when using "Set Vertex Colors" without a brush. #128257

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Anirudh Vempati · 2024-09-27T15:45:31+02:00

Anirudh Vempati commented

2024-09-27 15:45:31 +02:00

System Information
Operating system: Windows 10 Version 10.0.19045.4894
Graphics card: Nvidia

Blender Version
Broken: main
Worked: unknown

Short description of error
Clicking "Set Vertex Colors" in the Paint menu in Vertex Paint mode causes Blender to crash with the following error,

Error   : EXCEPTION_ACCESS_VIOLATION
Address : 0x00007FF60B77B604
Module  : blender.exe
Thread  : 0000098c
Writing: C:\Users\xxxxxx\AppData\Local\Temp\blender.crash.txt

Exact steps for others to reproduce the error
Use default startup cube.

Use the dropdown at top left to change to Vertex Paint mode.
Press Set Vertex Colors in the Paint menu.

The issue is due to a null pointer dereference in the call to IMB_colormanagement_srgb_to_scene_linear_v3 in vpaint_get_current_col in paint_vertex.cc. BKE_paint_brush_for_read returns a null pointer and as a result brush_color points to the zero page, thus causing a null pointer dereference and hence the access violation exception.

**System Information** Operating system: Windows 10 Version 10.0.19045.4894 Graphics card: Nvidia **Blender Version** Broken: main Worked: unknown **Short description of error** Clicking "Set Vertex Colors" in the Paint menu in Vertex Paint mode causes Blender to crash with the following error, ``` Error : EXCEPTION_ACCESS_VIOLATION Address : 0x00007FF60B77B604 Module : blender.exe Thread : 0000098c Writing: C:\Users\xxxxxx\AppData\Local\Temp\blender.crash.txt ``` **Exact steps for others to reproduce the error** Use default startup cube. 1. Use the dropdown at top left to change to Vertex Paint mode. 2. Press Set Vertex Colors in the Paint menu. The issue is due to a null pointer dereference in the call to `IMB_colormanagement_srgb_to_scene_linear_v3` in `vpaint_get_current_col` in `paint_vertex.cc`. `BKE_paint_brush_for_read` returns a null pointer and as a result `brush_color` points to the zero page, thus causing a null pointer dereference and hence the access violation exception.

Anirudh Vempati added the

labels 2024-09-27 15:45:32 +02:00

Anirudh Vempati referenced a pull request that will close this issue

2024-09-27 15:53:52 +02:00

Fix #128257: Crash when using Set Vertex Colors with no brush #128260

YimingWu added

Module

Sculpt, Paint & Texture

and removed

labels 2024-09-27 16:36:57 +02:00

Sean Kim commented

2024-09-30 17:50:57 +02:00

Lowering the severity of this issue since the crash was based on the assets being in a weird state when setting the repo up (mentioned in the linked PR)

Sean Kim added

and removed

labels 2024-09-30 17:51:17 +02:00

Sean Kim referenced this issue from a commit

2024-10-01 00:05:12 +02:00

Fix #128257: Crash when using Set Vertex Colors with no brush

Sean Kim closed this issue

2024-10-01 00:05:13 +02:00