In the Linux kernel, the following vulnerability has been resolved: pcmcia: Fix a NULL pointer dereference in _iodynfindioregion() In _iodynfindioregion(), pcmciamakeresource() is assigned to res and used in pcibusallocresource(). There is a dereference of res in pcibusallocresource(), which could lead to a NULL pointer dereference on failure of pcmciamakeresource(). Fix this bug by adding a check of res.