Possible regression reading DPX files

[filmkorn]

Hello,

We've encountered an error trying to run identify or convert on some DPX files.

Code: Select all

identify: ImproperImageHeader
' @ error/dpx.c/ReadDPXImage/744.

I'm assuming this relates to these lines:

Code: Select all

  if (dpx.file.industry_size > GetBlobSize(image))
     ThrowReaderException(CorruptImageError,"ImproperImageHeader");

Unfortunately I don't know what `dpx.file.industry_size` relates to. I am unsure if the file is header is actually corrupted or the validation above is incorrect.

The file is readable in older versions 7.0.2-6 to 7.0.6-9 though, but not in 7.0.8-47 or 7.0.8-50.
Converting the file (using older versions of convert or oiiotool) produces a file readable by the latest version.

Unfortunately I am not allowed to share the file in question. So my first question would be how I can share the relevant header?

Apologies for the lack of infos.

Any help would be appreciated so we don't get stuck on an old version.

Best,

Mitja

[magick]

Can you post a link to a DPX image that throws this exception? We need to reproduce the problem to determine why the exception is thrown and determine if there is a bug or if its a security issue.