Bug 111139

Summary: linux 5.2: rare NULL pointer dereference when SteamVR idles
Product: DRI Reporter: Christoph Haag <haagch>
Component: DRM/AMDgpuAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact:
Severity: normal    
Priority: medium CC: nicholas.kazlauskas
Version: DRI git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
dmesg with null pointer dereference none

Description Christoph Haag 2019-07-15 17:19:35 UTC 
Created attachment 144791 [details]
dmesg with null pointer dereference

Vega 64, mesa git b68778e6de2, Linux 5.2.

I am relatively sure this started happening with linux 5.2 and that this did not happen on 5.1.

When SteamVR is idle for a while (i.e. the VR headset is not moved), it stops rendering to not waste resources.

When it does this, there is a chance that a kernel bug happens, see attached dmesg.

It does not happen very often, but often enough that I'm relatively sure it started happening with 5.2.
Comment 1 Christoph Haag 2019-07-19 02:31:06 UTC 
I'm being told that this bug does not only happen with SteamVR, and that it has been triggered without SteamVR running, possibly by Chrome/Chromium.
Comment 2 Martin Peres 2019-11-19 09:36:43 UTC 
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