Public bug reported:
After a recent upgrade of virtualbox-guest-utils from version
6.1.16-dfsg-6~ubuntu1.20.04.2 to 6.1.22-dfsg-2~ubuntu1.20.04.1 (on an
Ubuntu 20.04 guest system running in a VirtualBox VM), mounting shared
folders doesn't work any more.
When trying to mount a shared folder, the following error messages
appear in /var/log/kern.log:
vboxsf: Invalid info signature: 0x75 0x69 0x64 0x3d!
vbsf_read_super_aux err=-22
After downgrading the package virtualbox-guest-utils (on the guest system) from
6.1.22-dfsg-2~ubuntu1.20.04.1 to 6.1.16-dfsg-6~ubuntu1.20.04.2, shared folders
can be mounted again.
Version information:
Host: Ubuntu 21.04 AMD64, Kernel 5.11.0-25-generic, Virtualbox 6.1.18-dfsg-5
Guest: Ubuntu 20.04 AMD64, Kernel 5.4.0-80-generic
** Affects: virtualbox (Ubuntu)
Importance: Undecided
Status: New
** Package changed: dkms (Ubuntu) => virtualbox (Ubuntu)
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https://bugs.launchpad.net/bugs/1939168
Title:
Recent virtualbox-guest-utils update breaks mounting of shared folders
(vboxsf)
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