fix Uvarint overflow. (see golang#11)

makhov · Jun 1, 2015 · 432dca5 · 432dca5
1 parent a911026
commit 432dca5
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/snappy/decode.go b/snappy/decode.go
@@ -30,6 +30,9 @@ func decodedLen(src []byte) (blockLen, headerLen int, err error) {
 	if n == 0 {
 		return 0, 0, ErrCorrupt
 	}
+	if n < 0 {
+		return 0, 0, errors.New("snappy: value larger than 64 bits (overflow)")
+	}
 	if uint64(int(v)) != v {
 		return 0, 0, errors.New("snappy: decoded block is too large")
 	}