OSV-2020-1777 Heap-buffer-overflow in exif_process_IFD_in_MAKERNOTE

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19044 Crash type: Heap-buffer-overflow READ 9 Crash state: exifprocessIFDinMAKERNOTE exifprocessIFDTAG exifprocessIFDinTIFF...