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-rw-r--r--WebCore/fileapi/Blob.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/WebCore/fileapi/Blob.cpp b/WebCore/fileapi/Blob.cpp
index d5a5602..90df3c4 100644
--- a/WebCore/fileapi/Blob.cpp
+++ b/WebCore/fileapi/Blob.cpp
@@ -86,7 +86,7 @@ PassRefPtr<Blob> Blob::slice(long long start, long long length, const String& co
if (start >= size) {
start = 0;
length = 0;
- } else if (start + length > size)
+ } else if (start + length > size || length > std::numeric_limits<long long>::max() - start)
length = size - start;
OwnPtr<BlobData> blobData = BlobData::create();