Crash using force fields and hair dynamics #73304

New Issue

Scott Ramsay · 2020-01-21T22:16:00+01:00

Scott Ramsay commented

2020-01-21 22:16:00 +01:00

System Information
Operating system: Linux-5.4.13-arch1-1-x86_64-with-arch 64 Bits
Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.44

Blender Version
Broken: version: 2.83 (sub 1), branch: master, commit date: 2020-01-20 22:30, hash: 04e318de3a

Short description of error
Using any force objects along with Hair Dynamics enabled causes Blender to crash.

Exact steps for others to reproduce the error
From the default scene, add any force field object (wind, turbulence, drag, etc...)
Select the default cube and add a hair particle system
Enable 'Hair Dynamics'
Press play to crash

Example file - open and press play
hair-crash.blend

**System Information** Operating system: Linux-5.4.13-arch1-1-x86_64-with-arch 64 Bits Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.44 **Blender Version** Broken: version: 2.83 (sub 1), branch: master, commit date: 2020-01-20 22:30, hash: `04e318de3a` **Short description of error** Using any force objects along with Hair Dynamics enabled causes Blender to crash. **Exact steps for others to reproduce the error** From the default scene, add any force field object (wind, turbulence, drag, etc...) Select the default cube and add a hair particle system Enable 'Hair Dynamics' Press play to crash Example file - open and press play [hair-crash.blend](https://archive.blender.org/developer/F8293966/hair-crash.blend)

Scott Ramsay commented

2020-01-21 22:16:00 +01:00

Added subscriber: @smramsay

Jacques Lucke commented

2020-01-22 11:27:37 +01:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2020-01-22 11:27:37 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Jacques Lucke commented

2020-01-22 11:27:37 +01:00

There is a heap-buffer-overflow.

==4668==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6060004400a0 at pc 0x562f34c62fd0 bp 0x7fd8dd5f9340 sp 0x7fd8dd5f9330
READ of size 4 at 0x6060004400a0 thread T66
    - 0 0x562f34c62fcf in cloth_calc_force /home/jacques/blender-git/blender/source/blender/physics/intern/BPH_mass_spring.cpp:639
    - 1 0x562f34c6bf91 in BPH_cloth_solve /home/jacques/blender-git/blender/source/blender/physics/intern/BPH_mass_spring.cpp:1167
    - 2 0x562f2e87564f in do_step_cloth /home/jacques/blender-git/blender/source/blender/blenkernel/intern/cloth.c:405
    - 3 0x562f2e876dff in clothModifier_do /home/jacques/blender-git/blender/source/blender/blenkernel/intern/cloth.c:515
    - 4 0x562f2e3b3eb2 in do_hair_dynamics /home/jacques/blender-git/blender/source/blender/blenkernel/intern/particle_system.c:3503
    - 5 0x562f2e3b547c in hair_step /home/jacques/blender-git/blender/source/blender/blenkernel/intern/particle_system.c:3545
    - 6 0x562f2e3ccf7a in particle_system_update /home/jacques/blender-git/blender/source/blender/blenkernel/intern/particle_system.c:4872
    - 7 0x562f2fe1594f in deformVerts /home/jacques/blender-git/blender/source/blender/modifiers/intern/MOD_particlesystem.c:212
    - 8 0x562f2e1c9da1 in modwrap_deformVerts /home/jacques/blender-git/blender/source/blender/blenkernel/intern/modifier.c:976
    - 9 0x562f2e77b895 in mesh_calc_modifiers /home/jacques/blender-git/blender/source/blender/blenkernel/intern/DerivedMesh.c:983

There is a heap-buffer-overflow. ``` ==4668==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6060004400a0 at pc 0x562f34c62fd0 bp 0x7fd8dd5f9340 sp 0x7fd8dd5f9330 READ of size 4 at 0x6060004400a0 thread T66 - 0 0x562f34c62fcf in cloth_calc_force /home/jacques/blender-git/blender/source/blender/physics/intern/BPH_mass_spring.cpp:639 - 1 0x562f34c6bf91 in BPH_cloth_solve /home/jacques/blender-git/blender/source/blender/physics/intern/BPH_mass_spring.cpp:1167 - 2 0x562f2e87564f in do_step_cloth /home/jacques/blender-git/blender/source/blender/blenkernel/intern/cloth.c:405 - 3 0x562f2e876dff in clothModifier_do /home/jacques/blender-git/blender/source/blender/blenkernel/intern/cloth.c:515 - 4 0x562f2e3b3eb2 in do_hair_dynamics /home/jacques/blender-git/blender/source/blender/blenkernel/intern/particle_system.c:3503 - 5 0x562f2e3b547c in hair_step /home/jacques/blender-git/blender/source/blender/blenkernel/intern/particle_system.c:3545 - 6 0x562f2e3ccf7a in particle_system_update /home/jacques/blender-git/blender/source/blender/blenkernel/intern/particle_system.c:4872 - 7 0x562f2fe1594f in deformVerts /home/jacques/blender-git/blender/source/blender/modifiers/intern/MOD_particlesystem.c:212 - 8 0x562f2e1c9da1 in modwrap_deformVerts /home/jacques/blender-git/blender/source/blender/blenkernel/intern/modifier.c:976 - 9 0x562f2e77b895 in mesh_calc_modifiers /home/jacques/blender-git/blender/source/blender/blenkernel/intern/DerivedMesh.c:983 ```

Luca Rood was assigned by Jacques Lucke

2020-01-22 11:35:13 +01:00

Jacques Lucke commented

2020-01-22 11:35:13 +01:00

This seems to be caused by d42a7bbd6e.

This seems to be caused by d42a7bbd6e.

blender-admin commented

2020-01-26 15:15:02 +01:00

This issue was referenced by 96339c4cef

This issue was referenced by 96339c4cef104a007bafcc38a788a04e6b263ec8

Luca Rood commented

2020-01-26 15:28:26 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Luca Rood closed this issue

2020-01-26 15:28:26 +01:00

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Crash using force fields and hair dynamics #73304