1969893 - Crash in [@ abort | terminate]

Status: RESOLVED INCOMPLETE

(Core :: Graphics: CanvasWebGL, defect)

Description

[BugBot [:suhaib / :marco]]

Crash report: https://crash-stats.mozilla.org/report/index/24ee81dc-b3ca-4f44-b37b-136dc0250602

Reason: EXCEPTION_STACK_BUFFER_OVERRUN / FAST_FAIL_FATAL_APP_EXIT

Top 10 frames of crashing thread:

0  ucrtbase.dll  abort  
1  ucrtbase.dll  terminate  
2  ucrtbase.dll  FindHandler<__FrameHandler4>  
3  ucrtbase.dll  __InternalCxxFrameHandler<__FrameHandler4>  
4  ucrtbase.dll  __InternalCxxFrameHandlerWrapper<__FrameHandler4>  
5  ucrtbase.dll  _CxxFrameHandler4  
6  ntdll.dll  RtlpExecuteHandlerForException  
7  ntdll.dll  RtlDispatchException  
8  ntdll.dll  RtlRaiseException  
9  KERNELBASE.dll  RaiseException  

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

• First crash report: 2025-03-26
• Process type: Multiple distinct types
• Is startup crash: No
• Has user comments: No
• Is null crash: No

Comment 1

[Andrew McCreight [:mccr8]]

This signature looks pretty useless. I split by proto signatures and there's just a bunch of random junk. If I'm reading this stack correctly, it looks like this is happening when C++ code tries and fails to throw an exception.

Maybe the best fix here would be to add RaiseException as a sentinel, so all of the failed stack unwinding junk gets eaten up, and also add it to the prefix signature list. The volume in general is rather low so I'm not sure how useful that will be.

Hmm. It looks like RaiseException is already in a third list, the irrelevant signature list, so it could have some weird effects on existing signatures.
Some high volume (a few hundreds in the last month) signatures with RaiseException in the proto signature:
[@ hmpalert.dll | VirtualProtect ] bp-3a26eb62-4fda-4246-bac5-114c00250602
[@ RtlAllocateHeap | astmcwebbrowsercontrol.dll | RtlVirtualUnwind | RtlRaiseException | astmcwebbrowsercontrol.dll | <unknown in combase.pdb> ] bp-b1a4d43a-99e5-4822-8650-a562b0250602
[@ RtlAllocateHeap | astmcwebextension3.dll | RtlVirtualUnwind | RtlRaiseException | astmcwebextension3.dll | <unknown in combase.pdb> ] bp-e02dee81-db3f-4aef-88a6-948fc0250602

Comment 2

[Andrew McCreight [:mccr8]]

Let's just close this. It doesn't look like a useful bug.