https://codereview.chromium.org/2204793002
https://crbug.com/633387
https://pdfium.googlesource.com/pdfium/+/master/libtiff/

Author: thestig <thestig@chromium.org>
Date:   Mon Aug 1 19:36:27 2016 -0700

Fix a memory leak in libtiff.

--- a/libtiff/tif_dirread.c
+++ b/libtiff/tif_dirread.c
@@ -5372,6 +5372,8 @@ TIFFFetchStripThing(TIFF* tif, TIFFDirEntry* dir, uint32 nstrips, uint64** lpp)
 	static const char module[] = "TIFFFetchStripThing";
 	enum TIFFReadDirEntryErr err;
 	uint64* data;
+	_TIFFfree(*lpp);
+	*lpp = 0;
 	err=TIFFReadDirEntryLong8Array(tif,dir,&data);
 	if (err!=TIFFReadDirEntryErrOk)
 	{