fix error handling

process/process_linux.go

@@ -379,17 +379,16 @@ func (p *Process) ConnectionsMaxWithContext(ctx context.Context, max int) ([]net
 }
 
 // function of parsing a block
-func readBlock(line string, m *MemoryMapsStat) {
-
+func readBlock(line string, m *MemoryMapsStat) error {
 	field := strings.Split(line, ":")
 	if len(field) < 2 {
-		continue
+		return nil
 	}
 	v := strings.Trim(field[1], "kB") // remove last "kB"
 	v = strings.TrimSpace(v)
 	t, err := strconv.ParseUint(v, 10, 64)
 	if err != nil {
-		return m, err
+		return err
 	}
 
 	switch field[0] {
@@ -414,6 +413,7 @@ func readBlock(line string, m *MemoryMapsStat) {
 	case "Swap":
 		m.Swap = t
 	}
+	return nil
 }
 
 func appendToGrouped(ret []MemoryMapsStat, g *MemoryMapsStat) {
@@ -463,7 +463,9 @@ func (p *Process) MemoryMapsWithContext(ctx context.Context, grouped bool) (*[]M
 		} else if len(fields) > 0 && !strings.HasSuffix(fields[0], ":") {
 			m.Path = field[len(fields)-1]
 		} else {
-			readBlock(line, &ret[0])
+			if err := readBlock(line, &ret[0]); err != nil {
+				return nil, err
+			}
 		}
 	}