We analyzed this project once some time ago. The results of that check were described in the post "PVS-Studio: analyzing ReactOS's code" . After re-checking the project, we have found a lot of new bugs and suspicious code fragments.
One of the developers participating in this project suggested that we re-analyzed the source code, as the code base is growing fast. We were glad to do that. We like this project, and we'll be happy if this article helps the developers to eliminate some bugs. Analysis was performed with the PVS-Studio 5.02 code analyzer."
Link to Original Source