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Ticket Resolution Summary Owner Reporter
#21301 duplicate Please restore 'Restore current snapshot' davevm
Description

This option has been removed in V7 when closing a VM and it is very inconvenient for me (and others from forum posts). Please restore it or add an option setting to do so. Thank you.

#21297 duplicate Missing option to "Restore current snapshot" when close VM in VirtualBox 7 PeterCWatson
Description

After upgrading to VB7, the first thing I noticed on closing a VM was that the option to "restore current snapshot" was missing. This was a great feature, and removing it is very annoying! I have several VMs set up as test platforms and regularly start them, carry out a test (e.g. installing or running a program), then close the VM to restore its clean "snapshot" state. Having to go back to the main UI and restore the snapshot manually is an inconvenient extra step. After using VirtualBox for many years, this issue has prompted me to create an account and raise the issue in the hope it will be addressed.

#21292 invalid Shared folders between 64 bit host and 32 bit guests corrupt data. KimonHoffmann
Description

Writing to files shared via VirtualBox shared folders between a 64 bit host and a 32 bit linux guest leads to corrupted file contents on the opposing side.

This appears to be an issue between the upstream vboxsf module and the 64 bit host implementation, and I have been able to reproduce this issue without fail with multiple distributions if this condition was met.

Creating a file on the host side and viewing it on the guest side, yields:

  • A file with the correct size
  • Completely garbage content (apparently comprised of random guest memory).

Please note that this also applies to files that were already present, when the folder was first mounted in the VM.

Creating a file on the guest side and viewing it on the host side, yields:

  • A file with the correct size
  • Completely garbage content (probably also random memory).

Please note that when creating and later viewing a file on the guest side, its contents only appear unscathed for as long as the file stays in the cache. After executing a sync and dropping caches, its contents are just as garbled as if the file had been created on the host side.

This issue has been observed:

  • on macOS as well as Windows host (we were not able to test Linux hosts yet).
  • on VirtualBox versions going as far back as at least 6.1.28.

Neither the VirtualBox nor the vboxsf kernel module report any problems in either case.

--

People at Mageia have encountered what is probably the same issue and you can find the report including more elaborate analysis into what's happening here: https://bugs.mageia.org/show_bug.cgi?id=26214

I have discussed this problem in more detail in the context of a VirtualBox forum post that describes a similar issue, here: https://forums.virtualbox.org/viewtopic.php?f=6&t=105367&start=15#p523118

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