VirtualBox

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Ticket Resolution Summary Owner Reporter
#8053 obsolete VirtualBox RDP server sends two PDUs inside userData of one sendDataIndication. kiilerix
Description

VirtualBox RDP server will occasionally send extra data inside encrypted PDUs.

One example is that the VirtualBox server sends a sendDataIndication containing:

     initiator: User Channel
     channelId: I/O Channel
     dataPriority: high
     segmentation: begin end
     sec_flags: SEC_ENCRYPT

userData contains a security header that specifies encryption, and the decrypted data are:

18 00 07 00 00 00 00 00 00 00 00 00 06 00 1b 00 00 00 07 00 00 00 02 00
18 00 07 00 00 00 00 00 00 00 00 00 06 00 1b 00 00 00 07 00 00 00 03 00

It apparently contains two Share Data Header messages.

Note the similarity with the spurious message that is reported on http://www.virtualbox.org/ticket/8032 . I have also seen the issue with other "normal" (and much longer) PDUs.

I don't see any indication in the RDP specification that two messages in one sendDataIndication is permitted and I consider this a bug in the protocol implementation.

Microsofts RDP implementation never sends that.

AFAICS it is not defined how client implementations should handle such data, and they might choose to ignore the extra data or to fail because the received data obviously were wrong and nothing can be trusted.

I have only seen this when running XP (with Guest Additions) inside the VM. I have never seen it with linux and X (without additions) inside the VM. It mostly happens when minimizing/maximizing and moving the mouse in/out of the RDP client.

Please make sure that all Share Data Headers are sent in individual packages. That will allow interoperability with strictly protocol compliant clients.

VirtualBox-4.0-4.0.0_69151_fedora14-1.i686
Oracle_VM_VirtualBox_Extension_Pack-4.0.0-69151.vbox-extpack 
#8054 obsolete Disk errors ("No space left on device" with nearly empty disks) deever
Description

In a FreeBSD guest, doing disk I/O intensive things like copying large/deep directory trees, I'm getting errors after a while:

/: create/symlink failed, no inodes free
./configure: cannot create config.log: No space left on device

although df reports 97% free inodes and 95% free space on disk. These aren't reproducible for exactly the same filenames and somethimes, after restoring the current snapshot and redoing the same operation again, it succeeds.

I had something similar also in the previous x.0 versions (2.0 and 3.0) of VirtualBox, where there were no specific error messages, but general disk failure, so no way to run df anymore.

Maybe it is a matter that I use Linux LVM for storing the VM's data?

#8056 obsolete shared folders function failed, in VirtualBox 4.0.0 r69151 with Linux Guest kernel version 2.6.37 Ted Feng
Description

After installed Guest Addition, create shared folders, but mount failed.

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