Camera OMXMetadata issue

Hi

I'm using 4AJ.1.1 mr0, and I found "frame.mMetaData = allocator(-1, metaDataSize, 1, NULL);" in OMXMetadata.cpp

will allocate memory, but never release

allocator() will open "/dev/zero" but didn't close it

and fd will increase until system limit (1024 in our environment)

then it will make ion_map() failed in MemoryManager

So now, I want to release "mMetaData" but I don't know when to do that

Thanks