This bug was fixed in the package virtualbox - 6.1.16-dfsg-6
--------------- virtualbox (6.1.16-dfsg-6) unstable; urgency=medium
* debian/patches/linux-5.10-r0drv-memobj-fix-r0.patch: - upstream-proposed patch to fix a build failure with linux 5.10 (LP: #1903741)
-- Gianfranco Costamagna <email address hidden> Fri, 04 Dec 2020 23:58:18 +0100
This bug was fixed in the package virtualbox - 6.1.16-dfsg-6
---------------
virtualbox (6.1.16-dfsg-6) unstable; urgency=medium
* debian/ patches/ linux-5. 10-r0drv- memobj- fix-r0. patch:
- upstream-proposed patch to fix a build failure with linux 5.10
(LP: #1903741)
-- Gianfranco Costamagna <email address hidden> Fri, 04 Dec 2020 23:58:18 +0100