Stack Buffer Overrun Exception when a worksheet contains a picture

[niclasbb]

I use EPPlus in a web application running in Azure.
Version of .NET Framework is 4.8.4526.0.

Accessing worksheets containing drawings of type picture makes the application to chrash.

Crashdump from Azure:

InlinedCallFrame
InlinedCallFrame
DomainNeutralILStubClass.IL_STUB_PInvoke
System.Drawing.Image.FromStream
OfficeOpenXml.Drawing.GenericImageHandler.GetImageBounds
OfficeOpenXml.ExcelImageSettings.GetImageBounds
OfficeOpenXml.Drawing.PictureStore.GetImageBounds
OfficeOpenXml.Drawing.PictureStore.AddImage
OfficeOpenXml.Drawing.PictureStore.SavePicture
OfficeOpenXml.Drawing.ExcelImage.SetImageContainer
OfficeOpenXml.Drawing.ExcelPicture..ctor
OfficeOpenXml.Drawing.ExcelDrawing.GetDrawingFromNode
OfficeOpenXml.Drawing.ExcelDrawings.AddDrawings
OfficeOpenXml.Drawing.ExcelDrawings..ctor
OfficeOpenXml.ExcelWorksheets.Delete

[JanKallman]

Are you using the latest version of EPPlus?

[niclasbb]

Yes, version 6.1.3

[JanKallman]

Looks like a missing GDI issue. Are you using the free tier in Azure?

[hakano14]

No - Standard S3 Plan ( 4 vCPU and 7 GB Memory)

[JanKallman]

Does the workbooks open correctly if you run EPPlus locally?

[hakano14]

Yes - everything works perfect locally and on-premise servers. But crashes direct in Azure App Service (Windows Plan - .Net Framework).

[niclasbb]

If we remove the picture from the worksheet it works as well.

[JanKallman]

It likely crashes here...

EPPlus/src/EPPlus/Drawing/ImageHandling/GenericImageHandler.cs

Line 57 in c61adff

var img = Image.FromStream(image);

It's weird as it should catch the Exception and use the build in image handler. Also, if you use Windows it should have GDI available.
Is this your setting:

Do you have a more detailed stack trace of the error?

[niclasbb]

Yes that is the correct setting.

This is the file with the image causing the error. I have tried with some other images and this is the only one that fails.
Maybe there is a problem with this image?

Offermall_err.xlsx

[JanKallman]

This is an EMF image. I wonder if Azure's GDI implementation does not support EMF's. I will try to see if I can replicate this issue. We have a build in handler for all image types, but it seems that it does not fallback on it when an exception is thrown in this case.

[JanKallman]

Obviously the quick fix for you is to change the image to a png or jpg and see if it works.

[niclasbb]

Yes other image types seem to work.

[JanKallman]

I will remove the usage of System.Drawing.Common in for .NET framework in the GenericImageHandler , so it will use the build-in instead (Note that .NET core, .NET 6 & 7 already uses it). This should solve this issue.