1975343 - Crash in [@ <unknown in nvwgf2umx.dll> | CDecodeContext::CLS::FinalConstruct]

Status: RESOLVED WORKSFORME

(Core :: Audio/Video, defect, P3)

Description

[BugBot [:suhaib / :marco]]

Crash report: https://crash-stats.mozilla.org/report/index/14fbc46e-f5d1-44e4-ab5e-6249e0250626

Reason: EXCEPTION_ACCESS_VIOLATION_WRITE

Top 10 frames of crashing thread:

0  nvwgf2umx.dll  <unknown in nvwgf2umx.dll>  
1  nvwgf2umx.dll  <unknown in nvwgf2umx.dll>  
2  nvwgf2umx.dll  <unknown in nvwgf2umx.dll>  
3  nvwgf2umx.dll  <unknown in nvwgf2umx.dll>  
4  nvwgf2umx.dll  <unknown in nvwgf2umx.dll>  
5  nvwgf2umx.dll  <unknown in nvwgf2umx.dll>  
6  d3d11.dll  CDecodeContext::CLS::FinalConstruct  
7  d3d11.dll  CLayeredObjectWithCLS<CDecodeContext>::FinalConstruct  
8  d3d11.dll  CLayeredObjectWithCLS<CDecodeContext>::CreateInstance  
9  d3d11.dll  CDevice::CreateLayeredChild  

By querying Nightly crashes reported within the last 2 months, here are some insights about the signature:

• First crash report: 2025-04-26
• Process type: GPU
• Is startup crash: No
• Has user comments: No
• Is null crash: Yes - all crashes happened on null or near null memory address

Comment 1

[Jim Mathies [:jimm]]

Seems to be happening on the creation of a driver video decoder in the gpu process.

CDevice::CreateVideoDecoder(D3D11_VIDEO_DECODER_DESC const*, D3D11_VIDEO_DECODER_CONFIG const*, ID3D11VideoDecoder**)

Comment 2

[BugBot [:suhaib / :marco]]

Closing because no crashes reported for 12 weeks.