id summary reporter owner description type status component version resolution keywords cc guest host 6183 VBoxSF.sys attempts to close an invalid kernel handle Bruce Cran When booting Windows 7 x86 with the driver verifier enabled (for a different driver), an INVALID_KERNEL_HANDLE crash occurs on startup, and WinDBG reports that VBoxSF.sys is at fault. VirtualBox is running on a FreeBSD 9-CURRENT host. defect closed shared folders VirtualBox 3.1.2 fixed Windows other