Merge cherrypicks of [2331043, 2330986, 2331024, 2331025, 2330859, 2330970, 2331044, 2330893, 2330950, 2330951, 2330940, 2331045, 2330954, 2330799, 2330987, 2331004, 2331061, 2331005, 2331047, 2330955, 2331030, 2331031, 2331101, 2330972, 2330956, 2331032, 2331006, 2330894, 2331063, 2331064, 2330895, 2331048, 2331102, 2331035, 2331007, 2331083, 2331103, 2331104, 2330897, 2331084, 2331067, 2331009, 2331010, 2330898, 2330989, 2331105, 2330899, 2331011, 2331069, 2330990, 2331121, 2331122, 2331086] into nyc-mr2-security-a-release
Change-Id: Ie344f6e3f755cadbb802d0c2c2fbdc443efb0831
diff --git a/source/dng_ifd.cpp b/source/dng_ifd.cpp
index 317ebf9..7f22065 100644
--- a/source/dng_ifd.cpp
+++ b/source/dng_ifd.cpp
@@ -3979,7 +3979,7 @@
if (fTileWidth)
{
- return (fImageWidth + fTileWidth - 1) / fTileWidth;
+ return (SafeUint32Sub(SafeUint32Add(fImageWidth, fTileWidth), 1)) / fTileWidth;
}
@@ -3995,7 +3995,7 @@
if (fTileLength)
{
- return (fImageLength + fTileLength - 1) / fTileLength;
+ return (SafeUint32Sub(SafeUint32Add(fImageLength, fTileLength), 1)) / fTileLength;
}
