1 files changed, 3 insertions, 0 deletions
diff --git a/Lib/gzip.py b/Lib/gzip.py
index ac17810..6773ea3 100644
--- a/Lib/gzip.py
+++ b/Lib/gzip.py
@@ -603,6 +603,9 @@ def decompress(data):
         do = zlib.decompressobj(wbits=-zlib.MAX_WBITS)
         # Read all the data except the header
         decompressed = do.decompress(data[fp.tell():])
+        if not do.eof or len(do.unused_data) < 8:
+            raise EOFError("Compressed file ended before the end-of-stream "
+                           "marker was reached")
         crc, length = struct.unpack("<II", do.unused_data[:8])
         if crc != zlib.crc32(decompressed):
             raise BadGzipFile("CRC check failed")