1 files changed, 1 insertions, 1 deletions
diff --git a/exif.c b/exif.c
index 561852b..6d8b96d 100644
--- a/exif.c
+++ b/exif.c
@@ -658,7 +658,7 @@ static void ProcessExifDir(unsigned char * DirStart, unsigned char * OffsetBase,
             unsigned OffsetVal;
             OffsetVal = Get32u(DirEntry+8);
             // If its bigger than 4 bytes, the dir entry contains an offset.
-            if (OffsetVal+ByteCount > ExifLength){
+            if (OffsetVal > UINT32_MAX - ByteCount || OffsetVal+ByteCount > ExifLength){
                 // Bogus pointer offset and / or bytecount value
                 ErrNonfatal("Illegal value pointer for tag %04x", Tag,0);
                 continue;