Merge pull request #6847 from ipfs/fix/6765

fix: fix a potential out of bounds issue in fuse

fuse/readonly/readonly_unix.go

@@ -257,13 +257,15 @@ func (s *Node) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadR
 	if err != nil {
 		return err
 	}
-
-	buf := resp.Data[:min(req.Size, int(int64(r.Size())-req.Offset))]
+	// Data has a capacity of Size
+	buf := resp.Data[:int(req.Size)]
 	n, err := io.ReadFull(r, buf)
-	if err != nil && err != io.EOF {
+	resp.Data = buf[:n]
+	switch err {
+	case nil, io.EOF, io.ErrUnexpectedEOF:
+	default:
 		return err
 	}
-	resp.Data = resp.Data[:n]
 	lm["res_size"] = n
 	return nil // may be non-nil / not succeeded
 }
@@ -287,10 +289,3 @@ type roNode interface {
 }
 
 var _ roNode = (*Node)(nil)
-
-func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}