Merge pull request #30 from ids1024/free

Avoid corrupting free node
2017-08-02 07:27:10 -06:00
parent 1e9cec6092 0996d844c4
commit e270ce117f
1 changed files with 6 additions and 1 deletions
@@ -185,7 +185,12 @@ impl FileSystem {
            Ok(())
        } else {
            if parent.1.next == 0 {
-                parent.1.next = self.allocate(1)?;
+                let next = self.allocate(1)?;
+                // Could be mutated by self.allocate if free block
+                if parent.0 == self.header.1.free {
+                    self.read_at(parent.0, &mut parent.1)?;
+                }
+                parent.1.next = next;
                self.write_at(parent.0, &parent.1)?;
                self.write_at(parent.1.next, &Node::default())?;
            }