cache - fix corruption when client prematurely terminates request (#8155)

cmd/disk-cache-backend.go

@@ -418,18 +418,19 @@ func (c *diskCache) bitrotWriteToCache(ctx context.Context, cachePath string, re
 	bufp := c.pool.Get().(*[]byte)
 	defer c.pool.Put(bufp)
 
+	var n int
 	for {
-		n, err := io.ReadFull(reader, *bufp)
-		if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF && err != io.ErrClosedPipe {
+		n, err = io.ReadFull(reader, *bufp)
+		if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF {
 			return 0, err
 		}
-		eof := err == io.EOF || err == io.ErrUnexpectedEOF || err == io.ErrClosedPipe
+		eof := err == io.EOF || err == io.ErrUnexpectedEOF
 		if n == 0 && size != 0 {
 			// Reached EOF, nothing more to be done.
 			break
 		}
 		h.Reset()
-		if _, err := h.Write((*bufp)[:n]); err != nil {
+		if _, err = h.Write((*bufp)[:n]); err != nil {
 			return 0, err
 		}
 		hashBytes := h.Sum(nil)
@@ -522,7 +523,9 @@ func (c *diskCache) Put(ctx context.Context, bucket, object string, data io.Read
 	if err != nil {
 		return err
 	}
-
+	if actualSize != uint64(n) {
+		return IncompleteBody{}
+	}
 	return c.saveMetadata(ctx, bucket, object, metadata, n)
 }
 

cmd/disk-cache.go

@@ -240,7 +240,7 @@ func (c *cacheObjects) GetObjectNInfo(ctx context.Context, bucket, object string
 		pipeWriter.CloseWithError(putErr)
 	}()
 	cleanupBackend := func() { bkReader.Close() }
-	cleanupPipe := func() { pipeReader.Close() }
+	cleanupPipe := func() { pipeWriter.Close() }
 	return NewGetObjectReaderFromReader(teeReader, bkReader.ObjInfo, opts.CheckCopyPrecondFn, cleanupBackend, cleanupPipe)
 }